WO2017191817A1 - アジド基含有Fcタンパク質 - Google Patents
アジド基含有Fcタンパク質 Download PDFInfo
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- WO2017191817A1 WO2017191817A1 PCT/JP2017/017013 JP2017017013W WO2017191817A1 WO 2017191817 A1 WO2017191817 A1 WO 2017191817A1 JP 2017017013 W JP2017017013 W JP 2017017013W WO 2017191817 A1 WO2017191817 A1 WO 2017191817A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/70503—Immunoglobulin superfamily
- C07K14/70535—Fc-receptors, e.g. CD16, CD32, CD64 (CD2314/705F)
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/68—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an antibody, an immunoglobulin or a fragment thereof, e.g. an Fc-fragment
- A61K47/6801—Drug-antibody or immunoglobulin conjugates defined by the pharmacologically or therapeutically active agent
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K19/00—Hybrid peptides, i.e. peptides covalently bound to nucleic acids, or non-covalently bound protein-protein complexes
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/02—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing at least one abnormal peptide link
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
- C07K2317/52—Constant or Fc region; Isotype
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/30—Non-immunoglobulin-derived peptide or protein having an immunoglobulin constant or Fc region, or a fragment thereof, attached thereto
Definitions
- the present invention relates to an azide group-containing Fc protein and a method for producing the same, an Fc protein derivative to which a target substance is added using the azide group-containing Fc protein as a material, a method for producing the same, and the like.
- target substances such as proteins have various physiological activities
- various preparations have been developed using such target substances.
- fusion proteins of target substances such as proteins and Fc proteins have been developed.
- Patent Document 1 describes a method for preparing a fusion protein of a target protein and an Fc protein by a recombinant method.
- an thioester (R 1 —CO—SR) of a target peptide and an Fc protein having a cysteine residue at the N-terminus (NH 2 —CH (CH 2 SH) —R 2 ) are obtained by a native chemical ligation method.
- a method for preparing a fusion protein (R 1 —CO—NH—CH (CH 2 SH) —R 2 ) of a target peptide and an Fc protein by reacting is described.
- Patent Document 3 discloses that a target peptide having a formyl group (R 1 —CH 2 —CHO) is reacted with an Fc protein having an amino group (H 2 N—R 2 ) by reductive amination reaction, A method for preparing a fusion protein (R 1 —CH 2 —CH 2 —NH—R 2 ) with an Fc protein is described.
- Patent Document 4 an Fc protein having an azido group introduced at an arbitrary position in a cell-free protein expression system is prepared, and then the target peptide and Fc protein are subjected to a strain-promoted azide-alkyne cyclization (SPAC) reaction.
- SPAC strain-promoted azide-alkyne cyclization
- the fusion protein may not be expressed depending on the sequence of the fusion protein, and since it cannot be used when the Fc protein is to be fused with a target substance other than the protein, There is a problem in terms of sex.
- a mixture of a monoadduct and a diadduct of the target protein with respect to the Fc protein is obtained even when a large excess of the thioester of the target protein is used.
- Patent Document 3 has a problem in terms of reaction efficiency, and has a problem that the sodium cyanoborohydride used in this reaction causes a side reaction called chemical conversion of protein side chains.
- Patent Document 4 has a problem that it is difficult to say that it is a practical method from the viewpoint of the availability and cost of raw materials for cell-free protein expression systems.
- An object of the present invention is to provide means for efficiently producing a fusion substance of an Fc protein and a target substance (eg, protein).
- the present inventors have produced a predetermined azide group-containing Fc protein by a specific enzyme reaction, and by using the produced azide group-containing Fc protein as a material, It has been found that the fusion protein can be produced efficiently.
- the methodology developed by the present inventors using a predetermined azide group-containing Fc protein as a material is excellent in versatility because it can also be applied to the addition of substances other than proteins to Fc proteins, and is a cell-free protein expression system. Since it can be avoided, it is considered to be excellent in practicality. Based on the above, the inventors have succeeded in solving the above-mentioned problems and have completed the present invention.
- N 3 represents an azide group
- L a represents a bond or a divalent group
- Phe represents a residue of phenylalanine or a derivative thereof
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus
- Fc represents Fc protein.
- N 3 -L a -Phe (2) A method for producing an azide group-containing Fc protein, Using phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase Following formula (2): N 3 -L a -Phe (2) [Where, N 3 represents an azide group; L a represents a bond or a divalent group, Phe represents phenylalanine or a derivative thereof.
- a phenylalanine derivative containing an azide group represented by Following formula (3): L b -Fc (3) [Where, L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus; Fc represents Fc protein.
- N 3 and L a is the same as the formula (2)
- Phe represents a residue of phenylalanine or a derivative thereof
- L b and Fc are the same as those in the above formula (3).
- a method for producing an Fc protein derivative to which a target substance is added Following formula (5): [Where, S represents the target substance, L represents a bond or a divalent group; Ring a represents a ring having a triple bond between carbon atoms.
- N 3 represents an azide group
- L a represents a bond or a divalent group
- Phe represents a residue of phenylalanine or a derivative thereof
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus
- Fc represents Fc protein.
- the method further includes reacting the target substance with a reagent containing a ring having a triple bond between carbon atoms to generate a target substance to which a ring having a triple bond between carbon atoms is added. ] Or [16].
- a method for producing an Fc protein derivative to which a target substance is added including the following (A) and (B): (A) Using phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase Following formula (2): N 3 -L a -Phe (2) [Where, N 3 represents an azide group; L a represents a bond or a divalent group, Phe represents phenylalanine or a derivative thereof.
- a phenylalanine derivative containing an azide group represented by Following formula (3): L b -Fc (3) [Where, L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus; Fc represents Fc protein.
- N 3 -L a -Phe-L b -Fc N 3 -L a -Phe-L b -Fc (1)
- Phe represents a residue of phenylalanine or a derivative thereof
- L b and Fc are the same as those in the above formula (3).
- B the following formula (5): [Where, S represents the target substance, L represents a bond or a divalent group; Ring a represents a ring having a triple bond between carbon atoms.
- a method for producing an Fc protein comprising: Using phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase, a phenylalanine derivative containing an azide group is reacted with an Fc protein having the peptide linker at the N-terminus to contain the azide group Producing a Fc protein.
- the azide group-containing Fc protein of the present invention is excellent in the reaction efficiency with the target substance to be fused, it is useful for producing an Fc protein derivative to which the target substance is added.
- the present invention also provides an Fc protein derivative produced by using such an azide group-containing Fc protein to which a target substance is added.
- the Fc protein of the present invention having a peptide linker consisting of 16 amino acid residues at the N-terminus is excellent in reaction efficiency with the target substance.
- FIG. 1 is a diagram showing an outline of the present invention.
- FIG. 2 shows the results of SDS-PAGE analysis of the eluate after purifying the culture supernatant of Cys-Fc gene-introduced HEK293 cells with protein A. Lane 1: Molecular weight marker; Lane 2: Culture supernatant; Lane 3: Protein A permeate; Lane 4: Protein A eluate.
- FIG. 3 is a diagram showing the evaluation of the conversion rate to an azide group-containing Fc protein by SDS-PAGE in the synthesis of an azide group-containing Fc protein (see reaction A in FIG. 1).
- phenylalanyl tRNA (tRNA Phe ), aminoacyl tRNA synthetase (double-mutant aminoacyl-tRNA synthetase), and leucyl / phenylalanyl tRNA transferase (L / F-transferase) are used.
- tRNA Phe phenylalanyl tRNA
- aminoacyl tRNA synthetase double-mutant aminoacyl-tRNA synthetase
- L / F-transferase leucyl / phenylalanyl tRNA transferase
- a phenylalanine derivative (4-azidophenylalanine) containing an azide group was added to the following various Fc proteins. Conv. : Conversion rate.
- FIG. 4 is a diagram showing the evaluation of the conversion rate to the Fc protein derivative by SDS-PAGE in the synthesis of the Fc protein derivative to which the target substance was added (comparative example to reaction B in FIG. 1). Synthesis of the Fc protein derivative to which the target substance was added (comparative example) was performed by the reaction of the Fc protein with the target substance by the S-alkylation reaction. Conv. : Conversion rate.
- FIG. 5 is a diagram showing the evaluation of the conversion rate to the Fc protein derivative by SDS-PAGE in the synthesis of the Fc protein derivative to which the target substance has been added (reaction B in FIG. 1). The synthesis of the Fc protein derivative to which the target substance was added was performed by the reaction of the target substance with the azide group-containing Fc protein by SPAAC reaction. Conv. : Conversion rate.
- FIG. 6 shows the results of SDS-PAGE analysis of Fc protein having a lysine residue at the N-terminus (Lys-Fc) produced using transformed cells.
- Lane 1 Molecular weight marker
- Lane 2 Refolding Mixture
- Lane 3 Fc protein having a lysine residue at the N-terminus (Fc protein prepared in Example 7).
- FIG. 7 is a diagram showing the evaluation of the conversion rate to the Fc protein derivative by SDS-PAGE in the synthesis of the Fc protein derivative to which the unnatural cyclic peptide as the target substance was added (Reaction B in FIG. 1).
- the synthesis of the Fc protein derivative to which the target substance was added was performed by the reaction of the target substance with the azide group-containing Fc protein by SPAAC reaction.
- Lane 1 molecular weight marker
- Lane 2 Fc protein Fc (16) before reaction (negative control)
- Lane 3 reaction mixture in the synthesis of Fc protein derivative to which the target substance was added.
- FIG. 8 is a diagram showing the evaluation of the conversion rate to the Fc protein derivative by SDS-PAGE in the synthesis of the Fc protein derivative to which the non-natural linear peptide as the target substance was added (Reaction B in FIG. 1). .
- the synthesis of the Fc protein derivative to which the target substance was added was performed by the reaction of the target substance with the azide group-containing Fc protein by SPAAC reaction. Lane 1: molecular weight marker; Lane 2: Fc protein Fc (16) before reaction (negative control); Lane 3: reaction mixture in the synthesis of Fc protein derivative to which the target substance was added.
- FIG. 9 is a diagram showing the evaluation of the conversion rate to the Fc protein derivative by SDS-PAGE in the synthesis of the Fc protein derivative to which the oligonucleic acid (SEQ ID NO: 21) as the target substance was added (Reaction B in FIG. 1). It is.
- the synthesis of the Fc protein derivative to which the target substance was added was performed by the reaction of the target substance with the azide group-containing Fc protein by SPAAC reaction. Lane 1: molecular weight marker; Lane 2: Fc protein Fc (16) before reaction (negative control); Lane 3: reaction mixture in the synthesis of Fc protein derivative to which the target substance was added.
- FIG. 10 is a diagram showing the evaluation of the conversion rate to the Fc protein derivative by SDS-PAGE in the synthesis of the Fc protein derivative added with the oligonucleic acid (SEQ ID NO: 22) as the target substance (reaction B in FIG. 1). It is.
- the synthesis of the Fc protein derivative to which the target substance was added was performed by the reaction of the target substance with the azide group-containing Fc protein by SPAAC reaction. Lane 1: molecular weight marker; Lane 2: Fc protein Fc (16) before reaction (negative control); Lane 3: reaction mixture in the synthesis of Fc protein derivative to which the target substance was added.
- the present invention provides an azide group-containing Fc protein.
- the azide group-containing Fc protein of the present invention is represented by the following formula (1).
- N 3 represents an azide group
- L a represents a bond or a divalent group
- Phe represents a residue of phenylalanine or a derivative thereof
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus
- Fc represents Fc protein.
- the bond between Phe and L b, and binding between L b and Fc is an amide bond. Therefore, the Phe-L b -Fc moiety in the above formula (1) shows a polypeptide structure in which the constituent amino acid residues are linked by an amide bond.
- the divalent group represented by L a is a straight or branched chain groups linking the N 3 and Phe.
- linear or branched divalent hydrocarbon group examples include alkylene, alkenylene, and alkynylene.
- alkylene alkylene having 1 to 12 carbon atoms is preferable, alkylene having 1 to 6 carbon atoms is more preferable, and alkylene having 1 to 4 carbon atoms is particularly preferable.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- Alkylene may be linear, branched or cyclic, but is preferably linear alkylene. Examples of such alkylene include methylene, ethylene, propylene, butylene, pentylene, and hexylene.
- the alkenylene is preferably an alkenylene having 2 to 12 carbon atoms, more preferably an alkenylene having 2 to 6 carbon atoms, and particularly preferably an alkenylene having 2 to 4 carbon atoms.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- Alkenylene may be linear, branched or cyclic, but linear alkenylene is preferred. Examples of such alkenylene include ethylenylene, propynylene, butenylene, pentenylene, and hexenylene.
- alkynylene alkynylene having 2 to 12 carbon atoms is preferable, alkynylene having 2 to 6 carbon atoms is more preferable, and alkynylene having 2 to 4 carbon atoms is particularly preferable.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- Alkynylene may be linear, branched or cyclic, but linear alkynylene is preferred. Examples of such alkynylene include ethynylene, propynylene, butynylene, pentynylene, and hexynylene.
- the substituent that the linear or branched divalent hydrocarbon group may have, and the substituent represented by Ra are the same as the substituent that the phenylalanine derivative described later may have,
- the preferred range is also the same, but a hydrocarbon group is particularly preferred.
- the number of substituents that the linear or branched divalent hydrocarbon group may have is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- the divalent group represented by L a preferably divalent hydrocarbon radical, alkylene is more preferable.
- L a is a bond.
- the formula (1) can also be expressed as N 3 -Phe-L b -Fc (1 ′).
- the residue of phenylalanine or its derivative represented by Phe is an amide bond to adjacent L b (lysine residue or arginine residue, or N-terminal lysine residue or arginine residue in the peptide linker). Therefore, it has a structure (namely, CO-) on the C-terminal side of the amide bond at the C-terminal.
- the derivative of phenylalanine is phenylalanine having 1 to 5, 1 to 3, or 1 or 2 substituents on the side chain portion (benzyl group) of phenylalanine.
- substituents are, for example: (I) a hydrocarbon group, a halogen atom (eg, fluorine atom, chlorine atom, bromine atom, iodine atom), guanidino, or cyano; (Ii) R b —O—, R b —C ( ⁇ O) —, R b —O—C ( ⁇ O) —, or R b —C ( ⁇ O) —O— [R b in (ii) Represents a hydrogen atom or a hydrocarbon group]; or (iii) NR b1 R b2 —, NR b1 R b2 —C ( ⁇ O) —, NR b1 R b2 —C ( ⁇ O) —O—, or R b1 —C ( ⁇ O) —NR b2 — [R b1 and R b2 in (iii) are the same or different and represent a hydrogen atom or a hydrocarbon group
- the hydrocarbon group in (i) to (iii) is a linear, branched or cyclic monovalent hydrocarbon group, preferably a linear or branched monovalent hydrocarbon group.
- hydrocarbon groups include alkyl, alkenyl, and alkynyl.
- alkyl for example, alkyl having 1 to 12 carbon atoms is preferable, alkyl having 1 to 6 carbon atoms is more preferable, and alkyl having 1 to 4 carbon atoms is particularly preferable.
- Alkyl may be linear, branched or cyclic, but linear or branched alkyl is preferred.
- alkyl examples include methyl, ethyl, propyl, iso-propyl, butyl, iso-butyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, 1-ethylpropyl, hexyl, isohexyl, 1, Examples include 1-dimethylbutyl, 2,2-dimethylbutyl, 3,3-dimethylbutyl, and 2-ethylbutyl.
- alkenyl alkenyl having 2 to 12 carbon atoms is preferable, alkenyl having 2 to 6 carbon atoms is more preferable, and alkenyl having 2 to 4 carbon atoms is particularly preferable.
- the alkenyl may be linear, branched or cyclic, but is preferably linear or branched alkenyl. Examples of such alkenyl include ethenyl, propenyl, butenyl, pentenyl, and hexenyl.
- Alkynyl is preferably alkynyl having 2 to 12 carbon atoms, more preferably alkynyl having 2 to 6 carbon atoms, and particularly preferably alkynyl having 2 to 4 carbon atoms.
- Alkynyl may be linear, branched or cyclic, but is preferably linear or branched alkynyl. Examples of such alkynyl include ethynyl, propynyl, butynyl, pentynyl, and hexynyl.
- L b represents a peptide linker comprising two or more amino acid residues having a lysine residue or an arginine residue, or lysine residue or an arginine residue at the N-terminus.
- L b is a lysine residue or arginine residue, or a peptide linker having a lysine residue or arginine residue at the N-terminus is that in the method for producing an azide group-containing Fc protein represented by formula (1), In order to link a phenylalanine derivative containing a group (which may correspond to the structural unit of “N 3 -L a -Phe”) to L b by an amide bond, the arginine residue is used as an amino acid to which the phenylalanine derivative can be linked.
- L b represents a peptide linker comprising two or more amino acid residues with lysine residues or arginine residues at the N-terminus.
- the amino acid residue is an L-amino acid residue or a D-amino acid residue, and an L-amino acid residue is preferred.
- the amino acid residue is also preferably an ⁇ -amino acid.
- preferred amino acid residues include, for example, L-alanine (A), L-asparagine (N), L-cysteine (C), L-glutamine (Q), L-isoleucine (I), L-leucine (L), L-methionine (M), L-phenylalanine (F), L-proline (P), L-serine (S), L-threonine (T), L-tryptophan (W), L Tyrosine (Y), L-valine (V), L-aspartic acid (D), L-glutamic acid (E), L-arginine (R), L-histidine (H), or L-lysine (K), And glycine (G).
- A L-alanine
- N L-asparagine
- C L-cysteine
- Q L-glutamine
- Q L-isoleucine
- I L-leucine
- M L-methionine
- M L-phenylalanine
- P
- the peptide linker consists of 4 or more amino acid residues.
- the peptide linker may be composed of 6 or more, 8 or more, 10 or more, 12 or more, or 14 or more amino acid residues.
- the peptide linker may also consist of no more than 30, no more than 25, no more than 20, or no more than 18 amino acid residues.
- the peptide linker consists of 16 amino acid residues.
- the peptide linker may be composed of an amino acid sequence heterologous to the amino acid sequence of the Fc protein.
- an amino acid sequence that is “heterologous” to the amino acid sequence of an Fc protein means that the antibody consists of an amino acid sequence that is different from the amino acid sequence to which the Fc protein is naturally linked in an antibody.
- the N-terminal amino acid (methionine) residue of the Fc protein is naturally linked to the C-terminus of glycine.
- the peptide linker consists of an amino acid sequence that does not contain a glycine residue at its C-terminus.
- the peptide linker may be: (1) a peptide comprising an amino acid sequence of KVDKKKVEPKSSDKTHT (SEQ ID NO: 8); or (2) an amino acid sequence of KVDKKKVEPKSSDDKTHT (SEQ ID NO: 8), selected from the group consisting of deletion, substitution, addition and insertion of amino acid residues Alternatively, a peptide consisting of an amino acid sequence containing a mutation of two amino acid residues.
- the Fc protein represented by Fc is derived from the Fc region of an antibody of any animal (eg, birds such as chickens, mammals).
- the animal species from which the Fc protein is derived is a mammal.
- mammals include primates (eg, humans, monkeys, chimpanzees), rodents (eg, mice, rats, guinea pigs, rabbits), cows, pigs, horses, goats, sheep, but primates Or rodents are preferred, primates are more preferred, and humans are even more preferred.
- antibodies from which the Fc protein is derived include IgG (eg, IgG1, IgG2, IgG3, IgG4), IgM, IgA, IgD, IgE, and IgY, and hybrids of the Fc portion of these antibodies. , IgM, IgA, IgD, or IgE are preferred, and IgG is more preferred.
- the Fc protein is human IgG (eg, IgG1, IgG2, IgG3, IgG4).
- the Fc protein is selected from the group consisting of (a) to (c) below: (A) a protein comprising the amino acid sequence of SEQ ID NO: 1; (B) a protein comprising an amino acid sequence comprising a mutation of one or several amino acid residues selected from the group consisting of deletion, substitution, addition and insertion of amino acid residues in the amino acid sequence of SEQ ID NO: 1; and (c ) A protein comprising an amino acid sequence having at least 90% homology with the amino acid sequence of SEQ ID NO: 1.
- the number of mutations for one or several amino acid residues is, for example, 1 to 50, preferably 1 to 40, more preferably 1 to 30, and even more preferably 1 to 20 and most preferably 1 to 10 (eg, 1, 2, 3, 4 or 5).
- the percent homology of the amino acid sequence is preferably 92% or more, more preferably 95% or more, even more preferably 97% or more, most preferably 98% or more or 99% or more. Also good. Examples of homology include identity and similarity, but identity is preferred.
- the homology of amino acid sequences is determined using, for example, the algorithm BLAST by Karlin and Altschul (Pro. Natl. Acad. Sci. USA, 90, 5873 (1993)) and FASTA by Pearson (Methods Enzymol., 183, 63 (1990)). Can be determined. Since a program called BLASTP has been developed based on this algorithm BLAST (see http://www.ncbi.nlm.nih.gov), these programs are used with default settings, and amino acid sequence homology is used. May be calculated.
- substitutions may be conservative substitutions.
- conservative substitution refers to substitution of a given amino acid residue with an amino acid residue having a similar side chain. Families of amino acid residues with similar side chains are well known in the art.
- such families include amino acids having basic side chains (eg, lysine, arginine, histidine), amino acids having acidic side chains (eg, aspartic acid, glutamic acid), amino acids having uncharged polar side chains (Eg, asparagine, glutamine, serine, threonine, tyrosine, cysteine), amino acids with non-polar side chains (eg, glycine, alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), ⁇ -branched side chain Amino acids (eg, threonine, valine, isoleucine), amino acids having aromatic side chains (eg, tyrosine, phenylalanine, tryptophan, histidine), amino acids having side groups containing hydroxyl groups (eg, alcoholic, phenolic) ( Example, serine, thread Nin, tyrosine), and amino acids (e.g.
- amino acids having an uncharged polar side chain and amino acids having a nonpolar side chain are sometimes collectively referred to as neutral amino acids.
- the conservative substitution of amino acids is a substitution between aspartic acid and glutamic acid, a substitution between arginine and lysine and histidine, a substitution between tryptophan and phenylalanine, and between phenylalanine and valine. Or a substitution between leucine, isoleucine and alanine, and a substitution between glycine and alanine.
- the azide group-containing Fc protein represented by the above formula (1) is represented by the following formula (1-1).
- N 3 represents an azide group
- L a represents a bond or a divalent group
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus
- Fc represents Fc protein, The benzene ring may be further substituted.
- the benzene ring has a group of N 3 -L a-at an arbitrary position, and preferably a group of —CH 2 —CH (NH 2 ) —CO—L b —Fc. On the other hand, it has a meta position or a para position.
- the substituent is the same as the substituent that the above-described phenylalanine derivative may have, and the preferred range is also the same.
- the number of substituents is 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- the benzene ring has a group of N 3 -L a-in the para position with respect to the group of -CH 2 -CH (NH 2 ) -CO-L b -Fc. .
- the present invention also provides a method for producing an azide group-containing Fc protein represented by the above formula (1).
- This method uses phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase to convert a phenylalanine derivative containing an azide group represented by the following formula (2) into the following formula (3). And reacting with an Fc protein having an lysine residue or an arginine residue at the N-terminus, to produce an azide group-containing Fc protein represented by the above formula (1).
- N 3 represents an azide group
- L a represents a bond or a divalent group
- Phe represents phenylalanine or a derivative thereof.
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus;
- Fc represents Fc protein.
- the derivative of phenylalanine represented by Phe is phenylalanine having 1 to 5, 1 to 3, or 1 or 2 substituents on the side chain portion (benzyl group) of phenylalanine.
- the substituent is the same as the substituent that the above-described phenylalanine derivative may have, and the preferred range is also the same.
- a phenylalanine derivative containing an azide group represented by the following formula (2) a large number of derivatives are known. Therefore, in the present invention, such a derivative can be synthesized as appropriate, and a commercially available product can also be used.
- the phenylalanine derivative containing an azide group represented by the above formula (2) is represented by the following formula (2-1).
- N 3 represents an azide group
- L a represents a bond or a divalent group
- the benzene ring may be further substituted.
- the benzene ring has a group of N 3 -L a-at an arbitrary position, but preferably a meta position or a group of —CH 2 —CH (NH 2 ) —COOH. Have a para position.
- the substituent is the same as the substituent that the above-described phenylalanine derivative may have, and the preferred range is also the same.
- the number of substituents is 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- the benzene ring has a group of N 3 -L a — in the para position with respect to the group of —CH 2 —CH (NH 2 ) —COOH.
- the Fc protein represented by the formula (3) having a lysine residue or arginine residue at the N-terminus can be prepared by any method.
- a method for example, (1) a protein in which a secretory signal peptide is added to an N-terminal lysine residue or arginine residue of an Fc protein having a lysine residue or arginine residue at the N-terminus is cultured cells.
- Fc protein having a lysine residue or an arginine residue at the N-terminus, wherein the secretion signal peptide is cleaved is recovered from the medium (eg, WO 2002/081694; WO 2005/103278) ; See WO 2014/126260), (2) a method of adding a lysine residue or arginine residue to the N-terminal amino acid residue of an Fc protein (eg, US Pat. No. 7,404,956) Proc. Jap. Acad. Ser.
- Reaction with phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase can be added by an amide bond.
- a reaction is known as a NEXT-A reaction (eg, JP 2009-106267 A, JP 2009-106268 A, and International Publication No. 2011/024887).
- tRNA Phe Phenylalanyl tRNA
- tRNA Phe Phenylalanyl tRNA
- the aminoacyl-tRNA synthetase can be prepared according to a report (for example, ChemBioChem 2009, 2460; J. Am. Chem. Soc. 2002, 5652; ChemBioChem 1991, 99; Chembiochem, 2002, 235-237).
- a wild-type aminoacyl-tRNA synthetase having substrate specificity for phenylalanine or a derivative thereof, and a variant of an aminoacyl-tRNA synthetase with increased specificity for phenylalanine or a derivative thereof are used. be able to.
- E. coli-derived phenylalanyl tRNA synthetase E. coli-derived phenylalanyl tRNA synthetase (E.
- coli PheRS coli PheRS
- any of Ala294 ⁇ Gly mutant, Ala356 ⁇ Trp mutant, Thr251 ⁇ Ala mutant, or Gly318 ⁇ Trp mutant, Or these multiple mutants can be used.
- a commercially available aminoacyl tRNA synthetase may be obtained.
- Leucyl / phenylalanyl tRNA transferase (L / F transferase) has the ability to transfer phenylalanine bound to tRNA Phe or a derivative thereof to a protein having a lysine residue or an arginine residue at the N-terminus.
- Leucyl / phenylalanyl tRNA transferase can be prepared according to previous reports (eg, ChemBioChem 2006, 1676; J. Biol. Chem. 1995, 20631; Chembiochem, 2008, 719-722).
- the reaction using phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase can be performed in an aqueous medium such as an appropriate buffer containing coenzyme (ATP), salts and the like.
- an aqueous medium such as an appropriate buffer containing coenzyme (ATP), salts and the like.
- the buffer include HEPES buffer and Tris-HCl.
- such a reaction can be performed using a mixture of a HEPES buffer containing MgCl 2 and Spermidine and a solution containing ATP.
- the amount of the phenylalanine derivative containing an azide group and the Fc protein having a lysine residue or an arginine residue at the N-terminus used in the reaction can be appropriately set.
- reaction conditions such as reaction temperature, reaction pH, and reaction time
- mild conditions capable of avoiding protein denaturation can be appropriately set.
- the reaction temperature is, for example, about 4 ° C. to 40 ° C., preferably about 15 ° C. to 37 ° C.
- the reaction pH is, for example, about 6 to 9, preferably about 6.5 to 8.5, more preferably 7 to 8.
- the reaction time can be appropriately set according to the reaction temperature and reaction pH conditions and the desired amount of the product.
- the present invention further provides an Fc protein derivative to which a target substance is added.
- the Fc protein derivative of the present invention is represented by the following formula (4).
- L represents a bond or a divalent group
- Ring A represents a ring fused with triazole
- L a represents a bond or a divalent group
- Phe represents a residue of phenylalanine or a derivative thereof
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus
- Fc represents Fc protein.
- the target substance represented by S is a polymer substance or a non-polymer substance in which two or more structural units are linked, and a polymer substance is preferable.
- the polymer material is a homopolymer material in which the same structural units are connected or a heteropolymer material in which different structural units are connected.
- the number of structural units in the polymer material is not particularly limited as long as it is 2 or more, but is preferably 5 or more, 10 or more, 15 or more, 20 or more, 25 or more, or 30 or more.
- the number of structural units in the polymer-based material may also be, for example, 500 or less, 300 or less, 200 or less, 100 or less, or 50 or less.
- polymer material examples include peptides, saccharides, and nucleotides.
- peptides used as target substances in the present invention include oligopeptides (eg, dipeptides, tripeptides, tetrapeptides), and polypeptides.
- the peptide may be composed of 20 types of L- ⁇ -amino acids as described above and any other amino acid (eg, D-amino acid).
- the peptide may also be linear, branched or cyclic.
- the peptide may be modified with a molecule such as a saccharide.
- Examples of the saccharide used in the present invention as a target substance or for peptide modification include oligosaccharides (eg, disaccharide, trisaccharide, tetrasaccharide), and polysaccharide.
- the saccharide may also be a functional saccharide such as a ligand.
- Examples of nucleotides used as target substances in the present invention include oligonucleotides (eg, dinucleotides, trinucleotides, tetranucleotides) and polynucleotides.
- nucleotide examples include natural nucleotides (eg, RNA, DNA) and non-natural nucleotides (eg, peptide nucleic acid, lock nucleic acid, cross-linked nucleic acid, phosphorothioate nucleic acid).
- the nucleotide may also be a functional nucleotide such as an antisense nucleic acid, an RNA interference-inducing nucleic acid (eg, siRNA), a micro RNA (miRNA), a nucleic acid aptamer (eg, a DNA aptamer, an RNA aptamer).
- the target substance may also be a medicine or a reagent.
- the peptide is preferably a physiologically active polypeptide.
- physiologically active polypeptides include hormones, cytokines, chemokines, enzymes, antibodies, growth factors, transcriptional regulators, vaccines, structural proteins, ligand proteins, receptors, cell surface antigens, receptor antagonists, blood Factors and peptide drugs are mentioned. More specifically, examples of such physiologically active polypeptides include human growth hormone, growth hormone releasing hormone, growth hormone releasing peptide, interferon, interferon receptor, colony stimulating factor, glucagon-like peptide (eg, GLP- 1 (including precursors and derivatives such as matured products and intermediates, for example, Patent No.
- GLP- 1 including precursors and derivatives such as matured products and intermediates, for example, Patent No.
- G protein coupled receptor interleukin, interleukin receptor, enzyme, interleukin binding protein, Cytokine binding protein, macrophage activating factor, macrophage peptide, B cell factor, T cell factor, protein A, allergy inhibitory factor, cell death glycoprotein, immunotoxin, lymphotoxin, tumor death factor, tumor suppressor, metastatic growth factor ⁇ -1 antitrypsin, albumin, ⁇ -lactalbumin, apolipoprotein-E, erythropoiesis factor, highly glycated erythropoiesis factor, angiopoietins, hemoglobin, thrombin, thrombin receptor active peptide, thrombomodulin, blood factor VII, VIIa VIII, IX and XIII, plasminogen activator, fibrin binding peptide, urokinase, streptokinase, hirudin, protein C, C-reactive protein, renin inhibitor, collagenas
- Such a physiologically active polypeptide can be appropriately used as a fusion protein with an Fc protein (see, for example, Japanese Patent No. 5020934).
- Preferred examples of the glucagon-like peptide include Exenatide, GLP-1 (7-37), and GLP-1 (1-37) (Japanese Patent No. 4548335).
- the divalent group represented by L is a group composed of a linear, branched, or cyclic group connecting the target substance S and the ring A, or a combination thereof.
- the divalent group represented by L may have a substituent.
- Examples of the divalent group represented by L include a divalent hydrocarbon group, —C ( ⁇ O) —, —C ( ⁇ O) —O—, —NR— (R represents a hydrogen atom, or a substituent.
- R represents a hydrogen atom or a substituent
- a divalent heterocyclic group and two or more thereof (for example, 2 to And groups having a combination of 8, preferably 2 to 6, more preferably 2 to 4).
- L is bonded to any atom in ring A, for example, a ring atom, but is preferably bonded to a ring atom different from the carbon atom shared with triazole.
- the divalent hydrocarbon group is a linear, branched or cyclic divalent hydrocarbon group, preferably a linear or branched divalent hydrocarbon group.
- Examples of such a divalent hydrocarbon group include alkylene, alkenylene, alkynylene, and arylene.
- Alkylene is an example of the divalent group represented by L, alkenylene, and definitions of alkynylene, examples and preferable examples are alkylene are examples of divalent groups represented by L a, alkenylene, and the same as that of alkynylene It is.
- arylene having 6 to 24 carbon atoms is preferable, arylene having 6 to 18 carbon atoms is more preferable, arylene having 6 to 14 carbon atoms is further preferable, and arylene having 6 to 10 carbon atoms is still more preferable. preferable.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- the arylene include phenylene (eg, when an Fc protein derivative represented by the formula (4) is produced using a fluorobenzene reagent), naphthylene, and anthracenylene.
- the substituent represented by R in —NR— and —C ( ⁇ O) —NR— which is an example of the divalent group represented by L, is the same as the substituent that the above-described phenylalanine derivative may have.
- the preferred range is also the same.
- the divalent heterocyclic group which is an example of the divalent group represented by L is a divalent aromatic heterocyclic group or a divalent non-aromatic heterocyclic group. It is preferable that the hetero atom constituting the heterocycle contains at least one selected from the group consisting of an oxygen atom, a sulfur atom, a nitrogen atom, a phosphorus atom, a boron atom and a silicon atom, and an oxygen atom, a sulfur atom and a nitrogen atom More preferably, at least one selected from the group consisting of:
- the divalent aromatic heterocyclic group is preferably a divalent aromatic heterocyclic group having 3 to 21 carbon atoms, more preferably a divalent aromatic heterocyclic group having 3 to 15 carbon atoms, A divalent aromatic heterocyclic group having 3 to 9 carbon atoms is more preferable, and a divalent aromatic heterocyclic group having 3 to 6 carbon atoms is still more preferable.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- examples of the divalent aromatic heterocyclic group include, for example, pyrenediyl, pyrrole diyl, frangiyl, thiophene diyl, pyridinediyl, pyridazinediyl, pyrimidinediyl, pyrazinediyl, triazinediyl, pyrrolindiyl, piperidinediyl, triazole
- Examples include diyl, purine diyl, anthraquinone diyl, carbazole diyl, fluorenediyl, quinoline diyl, and isoquinoline diyl.
- the divalent non-aromatic heterocyclic group is preferably a non-aromatic heterocyclic group having 3 to 21 carbon atoms, more preferably a non-aromatic heterocyclic group having 3 to 15 carbon atoms, and 3 to 3 carbon atoms.
- a non-aromatic heterocyclic group having 9 carbon atoms is more preferred, and a non-aromatic heterocyclic group having 3 to 6 carbon atoms is still more preferred.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- divalent non-aromatic heterocyclic group for example, 2,5-pyrroldionediyl (when the Fc protein derivative represented by the formula (4) is produced using a maleimide reagent), 3-pyrroline-2,5-dione-1,3-diyl (when an Fc protein derivative is produced using a halogenated maleimide reagent), pyrrol-3-arylthio-2,5-dione-1,3-diyl (When Fc protein derivatives are produced using arylthiomaleimide reagents), oxiranediyl, aziridindiyl, azetidinediyl, oxetanediyl, thietanediyl, pyrrolidinediyl, dihydrofurandyl, tetrahydrofurandiyl, dioxolanediyl, tetrahydrothiophenediyl, imidazolidinediyl
- the divalent non-aromatic heterocyclic group is 2,5-pyrroldionediyl, 3-pyrroline-2,5-dione-1,3-diyl, pyrrol-3-arylthio-2,5-dione- 1,3-diyl.
- the divalent group represented by L is -L 1 -L 2- (L 1 and L 2 represent a divalent group).
- examples of the divalent group represented by L 1 include a divalent group as described above for L, preferably an arylene or a divalent heterocyclic group, more preferably Arylene or a divalent non-aromatic heterocyclic group, and even more preferably, phenyldiyl, 2,5-pyrroledionediyl, 3-pyrroline-2,5-dione-1,3-diyl, pyrrole-3- Arylthio-2,5-dione-1,3-diyl.
- Examples of the divalent group represented by L 2 include a divalent hydrocarbon group, —C ( ⁇ O) —, —C ( ⁇ O) —O—, —NR— (where R is a hydrogen atom, or a substituent Group), —O—, —S—, —C ( ⁇ O) —NR— (R represents a hydrogen atom or a substituent), a divalent heterocyclic group, and two or more thereof (for example, 2 A group consisting of a combination of ⁇ 7, preferably 2 to 5, more preferably 2 or 3).
- a divalent hydrocarbon group which is an example of a divalent group represented by L 2 , —NR— (R represents a hydrogen atom or a substituent), —C ( ⁇ O) —NR— (R Represents a hydrogen atom or a substituent).
- R represents a hydrogen atom or a substituent
- C ( ⁇ O) —NR— R Represents a hydrogen atom or a substituent
- the divalent group represented by L or L 1 or L 2 may have a substituent.
- the substituent is the same as the substituent that the above-described phenylalanine derivative may have, and the preferred range is also the same.
- the number of substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- ring A represents a ring condensed with triazole.
- the constituent part of ring A does not include the condensed triazole ring itself, but includes a part of a double bond between carbon atoms shared with triazole. Therefore, it can be said that the ring A is a ring having a double bond between carbon atoms.
- Ring A is a single ring or a condensed ring of a single ring and another ring. Ring A may have a substituent.
- the monocycle is preferably a homocycle or a heterocycle containing one or more selected from the group consisting of oxygen, sulfur, nitrogen, phosphorus, boron and silicon atoms. More preferably, the monocycle is a homocycle or a heterocycle containing one or more selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom.
- the monocycle is preferably a 5- to 12-membered monocycle, more preferably a 6- to 10-membered monocycle, and even more preferably a 7- to 9-membered monocycle.
- a non-aromatic monocycle is preferable.
- rings A When ring A is a condensed ring, examples of other rings condensed with a single ring include cycloalkane, arene, and heterocyclic ring.
- cycloalkane a cycloalkane having 3 to 24 carbon atoms is preferable, a cycloalkane having 6 to 18 carbon atoms is more preferable, a cycloalkane having 3 to 14 carbon atoms is more preferable, and a cycloalkane having 3 to 10 carbon atoms is more preferable. Even more preferred are cycloalkanes.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- examples of the cycloalkane include cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, and cyclooctane.
- arenes having 6 to 24 carbon atoms are preferable, arenes having 6 to 18 carbon atoms are more preferable, arenes having 6 to 14 carbon atoms are further preferable, and arenes having 6 to 10 carbon atoms are even more preferable. preferable.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms. Examples of arenes include benzene, naphthalene, and anthracene.
- the heterocycle is an aromatic heterocycle or a non-aromatic heterocycle. It is preferable that the hetero atom constituting the heterocycle contains at least one selected from the group consisting of an oxygen atom, a sulfur atom, a nitrogen atom, a phosphorus atom, a boron atom and a silicon atom, and an oxygen atom, a sulfur atom and a nitrogen atom More preferably, at least one selected from the group consisting of:
- aromatic heterocycle an aromatic heterocycle having 3 to 21 carbon atoms is preferable, an aromatic heterocycle having 3 to 15 carbon atoms is more preferable, and an aromatic heterocycle having 3 to 9 carbon atoms is more preferable. Even more preferred are aromatic heterocycles having 3 to 6 carbon atoms.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- examples of the aromatic heterocycle include pyrene, pyrrole, furan, thiophene, pyridine, pyridazine, pyrimidine, pyrazine, triazine, pyrroline, piperidine, triazole, purine, anthraquinone, carbazole, fluorene, quinoline, and An isoquinoline is mentioned.
- the non-aromatic heterocyclic ring is preferably a non-aromatic heterocyclic ring having 3 to 21 carbon atoms, more preferably a non-aromatic heterocyclic ring having 3 to 15 carbon atoms, and a non-aromatic heterocyclic ring having 3 to 9 carbon atoms.
- a ring is more preferred, and a non-aromatic heterocycle having 3 to 6 carbon atoms is even more preferred.
- the number of carbon atoms of the substituent is not included in the number of carbon atoms.
- non-aromatic heterocycle examples include, for example, oxirane, aziridine, azetidine, oxetane, thietane, pyrrolidine, dihydrofuran, tetrahydrofuran, dioxolane, tetrahydrothiophene, imidazolidine, oxazolidine, piperidine, dihydropyran, tetrahydropyran. , Tetrahydrothiopyran, morpholine, thiomorpholine, piperazine, dihydrooxazine, tetrahydrooxazine, dihydropyrimidine, and tetrahydropyrimidine.
- the substituent that ring A may have is the same as the substituent that the phenylalanine derivative described above may have, and the preferred range is also the same.
- the number of substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- ring A is a 7 to 9-membered monocycle or a condensed ring of a 7 to 9-membered monocycle and another ring.
- Suitable examples of such ring A are as follows (see, for example, Org. Biomol. Chem. 2013, 11, 6439, Angew. Chem. Int. Ed. 2015, 54, 1190).
- One of X and Y represents CH 2 , the other represents CH 2 , NH, O, or S; Z represents CH 2 , NH, O, or S; V and W are the same or different and each represents CH 2 , NH, O, or S. ]
- the Fc protein derivative represented by the above formula (4) is represented by the following formula (4-1).
- L represents a bond or a divalent group
- Ring A represents a ring fused with triazole
- L a represents a bond or a divalent group
- L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus
- Fc represents Fc protein.
- the benzene ring may have a substituent.
- the substituent that the benzene ring may have is the same as the substituent that the phenylalanine derivative described above may have, and the preferred range is also the same.
- the number of substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- the Fc protein derivative represented by the above formula (4) is represented by the following formula (4-2).
- S represents the target substance, L represents a bond or a divalent group;
- Ring A ′ represents an 8-membered ring fused with triazole, One of X and Y represents CH 2 , the other represents CH 2 , NH, O, or S;
- R 1 to R 4 are the same or different and each represents a hydrogen atom or a substituent, Alternatively, R 1 and R 2 may be combined to form a ring having a substituent, and R 3 and R 4 may be combined to form a ring having a substituent,
- a double line consisting of a solid line and a broken line in ring A ′ represents a single bond or a double bond, L a represents a bond or a divalent group, L b represents a lysine residue or arginine residue, or a peptide linker consisting of two or more amino acid residues having a lysine residue or arginine residue at the N-terminus;
- Fc represents Fc protein.
- the definitions, examples and preferred examples of S, L, L a , L b and Fc are the same as those in formula (4).
- the benzene ring may have a substituent.
- the substituent that the benzene ring may have is the same as the substituent that the phenylalanine derivative described above may have, and the preferred range is also the same.
- the number of substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- one of X and Y represents CH 2 and the other represents CH 2 , NH, O, or S.
- one of X and Y represents CH 2 and the other represents CH 2 or NH.
- X or Y is connected to L.
- the SL— group bonded to ring A ′ may be linked to X or Y to show the structure of SL—CH or SL—N.
- R 1 to R 4 are the same as the substituents that the phenylalanine derivative described above may have, and the preferred ranges are also the same.
- Examples of the ring formed by combining R 1 and R 2 and / or R 3 and R 4 include the above-described cycloalkanes, arenes, and heterocycles.
- the definitions, examples and preferred examples of cycloalkane, arene and heterocycle are the same as those described above.
- the substituent that the ring formed by combining R 1 and R 2 and / or R 3 and R 4 may have the same substituents that the phenylalanine derivative described above may have.
- the preferable range is also the same.
- the number of substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- Ring A ′ may have an additional substituent in addition to R 1 to R 4 .
- additional substituents are the same as the substituents that the above-described phenylalanine derivative may have, and the preferred ranges are also the same.
- the number of additional substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- the present invention also provides a method for producing an Fc protein derivative represented by the above formula (4).
- a target substance to which a ring having a triple bond between carbon atoms represented by the following formula (5) is added is reacted with an azide group-containing Fc protein represented by the above formula (1).
- S represents the target substance
- L represents a bond or a divalent group
- Ring a represents a ring having a triple bond between carbon atoms.
- Ring a represents a ring having a triple bond between carbon atoms.
- Ring a is a single ring or a condensed ring of a single ring and another ring.
- Ring a may have a substituent.
- the monocycle is preferably a homocycle or a heterocycle containing one or more selected from the group consisting of oxygen, sulfur, nitrogen, phosphorus, boron and silicon atoms. More preferably, the monocycle is a homocycle or a heterocycle containing one or more selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom.
- a 7 to 10-membered monocycle is preferable, and a 7 to 9-membered monocycle is more preferable.
- As the monocycle a non-aromatic monocycle is preferable.
- examples of other rings condensed with a single ring include cycloalkane, arene, and heterocyclic ring.
- the definitions, examples and preferred examples of cycloalkane, arene and heterocycle are the same as those of other rings in the fused ring for ring A.
- the substituent that the ring a may have is the same as the substituent that the phenylalanine derivative described above may have, and the preferred range is also the same.
- the number of substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- ring a is a 7 to 9-membered monocycle or a condensed ring of a 7 to 9-membered monocycle and another ring.
- Suitable examples of such a ring a are as follows (eg, Org. Biomol. Chem. 2013, 11, 6439; Angew. Chem. Int. Ed. 2015, 54, 1190; J. Am. Chem. Soc). 2004, 126, 15046; J. Am. Chem. Soc. 2008, 130, 11486; Chem. Commun. 2010, 46, 97).
- One of X and Y represents a CH 2, the other is CH 2, NH, O, or indicate the S, Z represents CH 2 , NH, O, or S; V and W are the same or different and each represents CH 2 , NH, O, or S. ]
- the target substance to which a ring having a triple bond between carbon atoms represented by the above formula (5) is added has a triple bond between carbon atoms represented by the following formula (5 ′). It is a target substance to which an 8-membered ring is added.
- S represents the target substance, L represents a bond or a divalent group; Ring a ′ represents an 8-membered ring having a triple bond between carbon atoms, One of X and Y represents CH 2 , the other represents CH 2 , NH, O, or S; R 1 to R 4 are the same or different and each represents a hydrogen atom or a substituent, Alternatively, R 1 and R 2 may be combined to form a ring having a substituent, and R 3 and R 4 may be combined to form a ring having a substituent, A double line composed of a solid line and a broken line in ring A ′ represents a single bond or a double bond. ]
- Ring a ′ may have an additional substituent in addition to R 1 to R 4 .
- additional substituents are the same as the substituents that the above-described phenylalanine derivative may have, and the preferred ranges are also the same.
- the number of additional substituents is, for example, 1 to 5, preferably 1 to 3, and more preferably 1 or 2.
- the reaction in the method for producing an Fc protein derivative can proceed by coexisting with a target substance to which a ring having a triple bond between carbon atoms is added and an azide group-containing Fc protein (reaction B in FIG. 1). reference). This is because a triple bond between carbon atoms in a given ring and an azide group react non-enzymatically.
- Such a reaction can be carried out in the presence or absence of a copper catalyst.
- Such a reaction is also known as a Huisgen reaction. Copper catalysts are used to increase reaction efficiency. However, it is preferable to carry out the reaction in the absence of the copper catalyst because the cytotoxicity of the copper catalyst and the residue in the product can be avoided.
- the reaction can be efficiently performed in the absence of a copper catalyst.
- a reaction is also known as a strain-promoted azide-alkyne cyclization (SPAC) reaction (eg, Org. Biomol. Chem. 2013, 11, 6439; Angew. Chem. Int. Ed. 2015, 54, 1190; J. Am. Chem. Soc. 2004, 126, 15046; J. Am. Chem. Soc. 2008, 130, 11486; Chem. Commun. 2010, 46, 97).
- SPAC strain-promoted azide-alkyne cyclization
- the method for producing an Fc protein derivative comprises reacting a target substance with a reagent containing a ring having a triple bond between carbon atoms to generate a target substance to which a ring having a triple bond between carbon atoms is added. Further, it may be included.
- a reagent include a maleimide reagent, a halogenated maleimide reagent, an alkylthiomaleimide reagent, and a fluorobenzene reagent.
- the amount of the target substance to which a ring having a triple bond between carbon atoms is used and the azide group-containing Fc protein used in the reaction can be appropriately set.
- a target substance to which a ring is added can be used.
- the reaction can be performed in an aqueous medium such as an appropriate buffer.
- aqueous medium such as an appropriate buffer.
- the buffer include phosphate buffer, HEPES buffer, Tris-HCl, and the like.
- reaction conditions such as reaction temperature, reaction pH, and reaction time
- mild conditions capable of avoiding protein denaturation can be appropriately set.
- the reaction temperature is, for example, about 4 ° C. to 40 ° C., preferably about 15 ° C. to 37 ° C.
- the reaction pH is, for example, about 6 to 9, preferably about 6.5 to 8.5, more preferably 7 to 8.
- the reaction time can be appropriately set according to the reaction temperature and reaction pH conditions and the desired amount of the product.
- the present invention also provides a method for producing an Fc protein derivative comprising the following steps: (A) Using phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase, reacting a phenylalanine derivative containing an azide group with an Fc protein having a lysine residue or an arginine residue at the N-terminus To produce an azide group-containing Fc protein; and (B) reacting a target substance to which a ring having a triple bond between carbon atoms is added with an azide group-containing Fc protein to produce an Fc protein derivative To do.
- Step (A) can be performed in the same manner as in the method for producing an azide group-containing Fc protein according to the present invention (see reaction A in FIG. 1).
- step (A) phenylalanyl tRNA, aminoacyl tRNA synthetase, leucyl / phenylalanyl tRNA transferase, phenylalanine derivative containing azide group, Fc protein having lysine residue or arginine residue at N-terminus, and azide
- the definition, examples and preferred examples of the group-containing Fc protein are as described above.
- Step (B) can be performed in the same manner as in the method for producing an Fc protein derivative according to the present invention (see reaction B in FIG. 1).
- Definitions, examples, and preferred examples of the target substance, azide group-containing Fc protein, and Fc protein derivative to which a ring having a triple bond between carbon atoms is added in the step (B) are as described above.
- Process (A) and (B) can be performed separately. Alternatively, steps (A) and (B) can be performed simultaneously. This is because the reactions in steps (A) and (B) are common in that they can be performed in an aqueous medium under mild conditions that can avoid protein denaturation. Therefore, the method of the present invention including steps (A) and (B) may be performed in a one-pot reaction.
- the Fc protein derivative of the present invention is useful, for example, as a medicine or a reagent. Accordingly, the Fc protein derivative of the present invention may be provided in the form of a pharmaceutical composition.
- a pharmaceutical composition may contain a pharmaceutically acceptable carrier in addition to the Fc protein derivative of the present invention.
- pharmaceutically acceptable carriers include sucrose, starch, mannitol, sorbit, lactose, glucose, cellulose, talc, calcium phosphate, calcium carbonate and other excipients, cellulose, methylcellulose, hydroxypropylcellulose, polypropylpyrrolidone.
- the Fc protein derivative of the present invention has an Fc protein portion, it can have high stability in the body of an animal such as a human.
- the Fc protein derivatives of the present invention may also have any modification (eg, PEGylation) that provides additional stability in addition to fusion with the Fc protein.
- Preparations suitable for oral administration include solutions in which an effective amount of an active ingredient is dissolved in a diluent such as water, physiological saline or orange juice, capsules or sachets containing an effective amount of the active ingredient as solids or granules.
- a diluent such as water, physiological saline or orange juice
- capsules or sachets containing an effective amount of the active ingredient as solids or granules.
- Agents or tablets suspensions in which an effective amount of an active ingredient is suspended in an appropriate dispersion medium
- emulsions in which an effective amount of an active ingredient is dissolved and dispersed in an appropriate dispersion medium .
- the pharmaceutical composition of the present invention is suitable for parenteral administration (eg, intravenous injection, subcutaneous injection, intramuscular injection, local injection, intraperitoneal administration).
- Such pharmaceutical compositions suitable for parenteral administration include aqueous and non-aqueous isotonic sterile injection solutions, which include antioxidants, buffers, antibacterial agents, isotonic agents. Etc. may be included.
- Aqueous and non-aqueous sterile suspensions are also included, which may contain suspending agents, solubilizers, thickeners, stabilizers, preservatives and the like.
- the dosage of the pharmaceutical composition of the present invention varies depending on the type and activity of the active ingredient, the severity of the disease, the animal species to be administered, the drug acceptability of the administration target, the body weight, the age, etc., but should be set as appropriate. Can do.
- the present invention provides an Fc protein having a peptide linker consisting of 16 amino acid residues at the N-terminus.
- peptide linker The definition, examples and preferred examples of the peptide linker are the same as those described above in (1. Azide group-containing Fc protein and method for producing the same) except that the peptide linker consists of 16 amino acid residues. .
- Fc protein The definition, examples and preferred examples of the Fc protein are the same as those described above (1. Azide group-containing Fc protein and production method thereof).
- the present invention also provides an azide having a phenylalanine derivative residue containing an azide group at the N-terminus via a peptide linker consisting of 16 amino acid residues whose N-terminal amino acid residue is a lysine residue or an arginine residue.
- a peptide linker consisting of 16 amino acid residues whose N-terminal amino acid residue is a lysine residue or an arginine residue.
- the present invention further provides a method for producing the azide group-containing Fc protein.
- phenylalanyl tRNA, aminoacyl tRNA synthetase and leucyl / phenylalanyl tRNA transferase are used to react a phenylalanine derivative containing an azide group with an Fc protein having the peptide linker at the N-terminus. Generating the azide group-containing Fc protein.
- phenylalanyl tRNA, aminoacyl tRNA synthetase, and leucyl / phenylalanyl tRNA transferase used in the above method for producing an azide group-containing Fc protein are as described in (1. Azide group-containing Fc protein). , And the manufacturing method thereof).
- the method for producing the azide group-containing Fc protein can be performed in the same manner as described above (1. Azide group-containing Fc protein and method for producing the same).
- Example 1 Preparation of Fc protein having a cysteine residue at the N-terminus (Cys-Fc) Cys-Fc (human IgG1-derived polypeptide consisting of the amino acid sequence of SEQ ID NO: 1) was expressed in HEK293 cells.
- HEK293 cells were transformed in an Opti-MEMI (Thermospheric Scientific) medium with an expression vector in which a gene encoding a polypeptide consisting of the amino acid sequence of SEQ ID NO: 2 was introduced into pSecTag2 / HygroA (Thermofisher Scientific).
- the gene encoding the polypeptide consisting of the amino acid sequence of SEQ ID NO: 2 encodes a protein in which a leader sequence [METDTLLLLWVLLLWVPGSTG (SEQ ID NO: 3)] is added to the N-terminus of the polypeptide consisting of the amino acid sequence of SEQ ID NO: 1. Since the protein secreted from the transformed cell is cleaved at the signal cleavage site immediately after the leader sequence, Cys-Fc (polypeptide comprising the amino acid sequence of SEQ ID NO: 1) is secreted into the culture supernatant. The obtained transformed cells were rotationally cultured (125 rpm) for 5 days under the conditions of 37 ° C. and CO 2 concentration of 8%.
- a leader sequence [METDTLLLLWVLLLWVPGSTG (SEQ ID NO: 3)] is added to the N-terminus of the polypeptide consisting of the amino acid sequence of SEQ ID NO: 1. Since the protein secreted from the transformed cell is cleaved
- the culture supernatant was obtained by centrifugation and purified with HiTrap Protein A FF (1 mL, GE Healthcare). The eluate was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, Bio-safe CBB G-250 staining under reducing conditions). The obtained Cys-Fc was analyzed by ESI-TOFMS according to the following procedure. The obtained Cys-Fc was subjected to sugar chain cleavage using PNGase F (NEW ENGLAND BioLabs, catalog number P0704) according to the manufacturer's protocol.
- GlycoBuffer2 (10 ⁇ , 8 ⁇ L) attached to the kit was added to a solution of Cys-Fc (40 ⁇ g), and water was added to make 80 ⁇ L. 4 ⁇ L of PNGase F solution diluted 10-fold with water was added and mixed, and then incubated at 37 ° C. for 24 hours. TFA (trifluoroacetic acid) was added to a final concentration of 0.2%, and the mixture was incubated at 37 ° C. for 30 minutes, and then this was subjected to 20 mM ammonium acetate (pH 6.5) using ultrafiltration (Vivaspin 500, 10 k MWCO). The buffer solution was replaced.
- Example 2 Preparation of peptide linker thioesters The peptide linker thioesters shown below were all prepared in the same manner. An N-terminal Boc-protected peptide was prepared by solid-phase peptide synthesis using 2-chlorotrityl resin by Fmoc method, and 20% HFIP (1,1,1,3,3,3-hexafluoro-2-propanol was prepared. ) / Protected peptide was cut out with dichloromethane solution.
- Example 3 Preparation of an Fc protein having a lysine residue at the N-terminus Fc protein is disclosed in patent literature (US Pat. No. 7,404,956) and non-patent literature (Proc. Jap. Acad. Ser. B, 2011, 603).
- 50 mM MES buffer (pH 6.5) containing 1.0 mM TCEP-HCl and 10 mM MPAA (4-mercaptophenylacetic acid) 0.02 mM Cys-Fc (prepared in Example 1) and 0.4 mM peptide linker
- the thioester (prepared in Example 2) was dissolved and mixed overnight at 25 ° C.
- the reaction solution was replaced with 20 mM acetate buffer (pH 5.5) with Vivaspin 500 (10k MWCO, Sartorius), and purified with Resource S (1 mL, GE Healthcare).
- the Fc protein having a lysine residue at the N-terminus obtained in Example 3 is as follows.
- the peptide linker and the Fc protein are linked through an amide bond because the peptide linker thioester reacts with the amino group of the N-terminal cysteine residue of the Fc protein to form an amide bond.
- Example 4 Preparation of enzyme and tRNA Two types of enzymes and tRNA used for the reaction of Fc protein having a lysine residue at the N-terminus and a phenylalanine derivative were prepared. Specifically, Leucyl / phenylalanyl-tRNA-protein transfer (L / F-Transferase) was prepared by the method described in non-patent literature (ChemBioChem 2006, 1676; J. Biol. Chem. 1995, 20631). Double-mutated ARS was prepared according to non-patent literature (ChemBioChem 2009, 2460; J. Am. Chem. Soc. 2002, 5562; ChemBioChem 1991, 99). tRNA Phe was prepared according to non-patent literature (ChemBioChem 2009, 2460; Nucleic Acids Res 1996, 907).
- Example 5 Difference in reactivity depending on N-terminal sequence of Fc protein (5-1) Preparation of target substance to which a ring having a triple bond between carbon atoms is added PEG as a target substance and a triple bond between carbon atoms A target substance (PEG-DIBAC) to which a ring having a ring was added was prepared by the following procedure.
- DIBAC acid (1-5 mg of 5- (5,6-Dihydro-11,12-dehydrodibenzo [b, f] azocin-5 (6H) -yl) -5-oxopentanoic acid) is dissolved in 1 mL of dichloromethane, and EDC-HCl 14.7 mg, HOBt-H 2 O 11.7 mg, diisopropylethylamine 17.5 ⁇ L were added, methoxypolyethyleneglycolpropylamine (SUNBRIGHT MEPA-20H) 102.2 mg was added, and the mixture was mixed overnight at room temperature. The reaction mixture was washed with saturated aqueous ammonium chloride solution and saturated brine, and the solvent was evaporated, and the residue was purified by silica gel column chromatography to obtain 94 mg of PEG-DIBAC.
- the obtained reaction mixture was purified by Protein A (Aspire Protein A Tips, Thermo), and the eluate was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, 4-20%, BIO-RAD). As shown in FIG.
- any Fc protein having a peptide linker length of 4 to 16 amino acid residues at the N-terminus was reacted with a phenylalanine derivative (4-azidophenylalanine), followed by the entire reaction with PEG-DIBAC. While showing a high conversion rate of 70% or more, there was a tendency that the conversion rate was different depending on the length of the peptide linker (FIG. 3). Fc (16) with a peptide linker length of 16 amino acid residues at the N-terminus showed an extremely high conversion rate of 90% (FIG. 3).
- Comparative Example 1 Method for producing Fc protein derivative to which target substance is added by S-alkylation reaction
- a peptide comprising the amino acid sequence of SEQ ID NO: 9 (Exenatide-Cys: cysteine at the C-terminal of a peptide drug called Exenatide was added by a peptide solid phase synthesis method.
- solution A 500 mM HEPES, pH 7.6, 100 mM MgCl 2 , 10 mM spermidine
- solution B 25 mM ATP, 200 mM KCl
- tRNA Phe aqueous solution (0.10 OD //) is added here.
- 4 ⁇ L double-mutant aminoacyl-tRNA synthetase solution (17.8 ⁇ M) 9 ⁇ L, L / F-transferase (39 ⁇ M) 4.1 ⁇ L, 4- (chloroacetamido) phenylalanine (11 mM) 29 ⁇ L, water 9.5 ⁇ L added Mixed.
- the obtained reaction mixture was purified with Protein A (Aspire Protein A Tips, Thermo), and the eluate was substituted with 0.1 M HEPES buffer, pH 7.5, and concentrated to 25 ⁇ L by ultrafiltration. To this was added 5 ⁇ L of an aqueous solution (18 mM) of the peptide (SEQ ID NO: 9) (containing 100 equivalents of the peptide (SEQ ID NO: 9) relative to the amount of chloroacetamide group-containing Fc protein), and mixed at 25 ° C. Shake for a day. As a result, an Fc protein derivative to which the peptide (SEQ ID NO: 9) was added was obtained by reacting the chloroacetamide group-containing Fc protein with the peptide (SEQ ID NO: 9).
- FIG. 4 shows the results of analyzing the obtained reaction mixture by SDS-PAGE (Mini-PROTEAN TGX gel, 4 to 20%, BIO-RAD; reducing conditions; stained with SYPRO (registered trademark) Ruby).
- reaction efficiency of the Fc protein by the S-alkylation reaction was 49% when about 100 equivalents of peptide was used relative to the amount of Fc protein (FIG. 4).
- Example 6 Method for producing Fc protein derivative to which target substance is added by SPAAC reaction (6-1) Preparation of azide group-containing Fc protein
- solution A 500 mM HEPES, pH 7.6, 100 mM MgCl 2
- solution B 25 mM ATP, 200 mM KCl
- tRNA Phe aqueous solution (0.10 OD / ⁇ L) 8 ⁇ L
- double-mutant aminoacid-tRNA synthetase solution 17.8 ⁇ M
- 18 ⁇ L L / F-transferase 39 ⁇ M
- 4-azidophenylalanine 11 mM
- the resulting reaction mixture was purified with Protein A (Aspire Protein A Tips, Thermo), and the eluate was replaced with a 0.1 M sodium phosphate buffer (pH 7.0), and ultrafiltered to 65 ⁇ L. Concentrated. The solution of the azide group-containing Fc protein was quantified by the A280 method, and it was 0.49 mg / mL.
- the Fc (16) used here and the azide group-containing Fc protein prepared here were analyzed by ESI-TOFMS according to the following procedure.
- the Fc (16) and azide group-containing Fc proteins were each cleaved using PNGase F (NEW ENGLAND BioLabs, catalog number P0704) according to the manufacturer's protocol.
- GlycoBuffer2 (10 ⁇ , 8 ⁇ L) attached to the kit was added to each compound (40 ⁇ g) solution, and water was added to make 80 ⁇ L. 4 ⁇ L of PNGase F solution diluted 10-fold with water was added and mixed, and then incubated at 37 ° C. for 24 hours. After adding TFA to a final concentration of 0.2% and incubating at 37 ° C.
- a peptide having the amino acid sequence of SEQ ID NO: 9 is used as a target substance to add a ring having a triple bond between carbon atoms.
- the target substance (peptide-DBCO adduct) was prepared by the following procedure. 818 ⁇ L of 0.1 M sodium phosphate buffer (pH 7.0) was added to 7.6 mg of the peptide consisting of the amino acid sequence of SEQ ID NO: 9, and DBCO (dibenzocyclooctyne) -maleimide (Tokyo Chemical Industries, 40 mM in DMSO) was added thereto.
- the obtained reaction mixture was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, 4 to 20%, BIO-RAD; under reducing conditions; stained with SYPRO (registered trademark) Ruby), and the results are shown in FIG. Further, the Fc protein derivative to which the obtained peptide (SEQ ID NO: 9) was added was analyzed by ESI-TOFMS according to the following procedure.
- the Fc protein derivative to which the obtained peptide (SEQ ID NO: 9) was added was subjected to sugar chain cleavage using PNGase F (NEW ENGLAND BioLabs, catalog number P0704) according to the manufacturer's protocol.
- GlycoBuffer2 (10 ⁇ , 8 ⁇ L) attached to the kit was added to a solution of the Fc protein derivative (40 ⁇ g) to which the peptide (SEQ ID NO: 9) was added, and water was added to make 80 ⁇ L. 4 ⁇ L of PNGase F solution diluted 10-fold with water was added and mixed, and then incubated at 37 ° C. for 24 hours. After adding TFA to a final concentration of 0.2% and incubating at 37 ° C. for 30 minutes, this was buffered to 20 mM ammonium acetate (pH 6.5) using ultrafiltration (Vivaspin 500, 10 k MWCO). Replaced.
- the reaction efficiency of the azide group-containing Fc protein by the SPAAC reaction showed a very high value of 100% even when a small amount of peptide equivalent to 2 equivalents to the amount of the azide group-containing Fc protein was used. (FIG. 5).
- Example 7 Preparation of Fc protein (Lys-Fc) having lysine residue at N-terminus using cultured cells (7-1) Construction of YDK0107 strain Bioactive peptide described in International Publication No. 2014/126260 C. as described in International Publication No. 2002/081694 using the secretion expression plasmid pPKK50TEV-Teri of Teriparatide. glutamicum YDK010 strain was transformed. PPKK50TEV-Teri is a secretory expression vector for Teriparatide, which is a physiologically active peptide.
- CspB50TEV-Teri International Publication No. 2014/126260.
- C. glutamicum YDK010 strain is C.I.
- the obtained transformant was added to a CMDex agar medium containing 25 mg / L kanamycin (glucose 5 g, magnesium sulfate heptahydrate 0.4 g, iron sulfate heptahydrate 0.01 g, manganese sulfate pentahydrate 0.
- YDK0107 strain After culture, a natural mutant strain in which a mutation was introduced into the phoS gene was selected and named YDK0107 strain.
- a plasmid full length of about 5.6 kbp was amplified by the PCR method using pPK4 as a template and the primers described in SEQ ID NO: 11 and SEQ ID NO: 12.
- Pyrobest (registered trademark) DNA polymerase (Takara Bio) was used for the PCR reaction, and the reaction conditions were 95 ° C. for 5 minutes (95 ° C. for 30 seconds, 55 ° C. for 1 minute, 72 ° C. for 12 minutes) ⁇ 12 cycle.
- the obtained PCR product was treated with the restriction enzyme DpnI to digest the methylated template DNA.
- the unmethylated plasmid obtained after Dpn I digestion was transformed into E. coli.
- the plasmid was obtained by introducing into a competent cell of E. coli JM109 (Takara Bio).
- a plasmid with a modified NaeI recognition site was constructed as expected.
- the base sequence was determined using BigDye (registered trademark) Terminator v3.1 Cycle Sequencing Kit (Applied Biosystems) and 3130 Genetic Analyzer (Applied Biosystems).
- the vector obtained by modifying the NaeI recognition site in the pPK4 vector thus obtained was named pPK5.
- the base sequence was determined using BigDye (registered trademark) Terminator v3.1 Cycle Sequencing Kit (Applied Biosystems) and 3130 Genetic Analyzer (Applied Biosystems).
- C Construction of a vector (pPK6) in which the recognition site for KpnI and XbaI in the tatABC gene in the pPK5-tatABC vector is modified (pPK6)
- the tatABC gene region in the pPK5-tatABC plasmid constructed in the previous section contains the restriction enzymes KpnI and XbaI. There is one recognition sequence.
- the KpnI recognition sequence ggtacc was changed to ggaacc
- the primers shown in SEQ ID NO: 15 and SEQ ID NO: 16 including the peripheral sequence in pPK5-tatABC
- the XbaI recognition sequence tctaga was changed to tgtaga.
- Primers described in SEQ ID NO: 17 and SEQ ID NO: 18 were synthesized, including the sequence and its surrounding sequences in pPK5-tatABC.
- the entire plasmid length of about 9.4 kbp was amplified by the PCR method so as to modify the KpnI recognition site in the tatABC gene region using pPK5-tatABC as a template and the primers described in SEQ ID NO: 15 and SEQ ID NO: 16.
- Pyrobest (registered trademark) DNA polymerase (Takara Bio) was used for the PCR reaction, and the reaction conditions were 95 ° C. for 5 minutes (95 ° C. for 30 seconds, 55 ° C. for 1 minute, 72 ° C. for 12 minutes) ⁇ 12 cycle.
- the obtained PCR product was treated with the restriction enzyme DpnI to digest the methylated template DNA.
- the unmethylated plasmid obtained after DpnI digestion was obtained from E. coli.
- the plasmid was obtained by introducing into a competent cell of E. coli JM109 (Takara Bio).
- pPK5-tatABC ⁇ KpnI a vector in which the KpnI recognition site in the tatABC gene region was modified, was constructed.
- the obtained PCR product was treated with the restriction enzyme DpnI to digest the methylated template DNA.
- the unmethylated plasmid obtained after DpnI digestion was obtained from E. coli.
- the plasmid was obtained by introducing into a competent cell of E. coli JM109 (Takara Bio).
- pPK5-tatABC ⁇ KpnI ⁇ XbaI which is a vector obtained by modifying the XbaI recognition sequence in the tatABC gene region, was obtained.
- the base sequence was determined using BigDye (registered trademark) Terminator v3.1 Cycle Sequencing Kit (Applied Biosystems) and 3130 Genetic Analyzer (Applied Biosystems).
- the tatABC gene carrying vector based on the pPK4 vector thus obtained was named pPK6.
- Each obtained transformant was mixed with MMTG liquid medium containing 25 mg / L of kanamycin (glucose 120 g, magnesium sulfate heptahydrate 3 g, ammonium sulfate 30 g, potassium dihydrogen phosphate 1.5 g, iron sulfate heptahydrate 0 0.03 g, manganese sulfate pentahydrate 0.03 g, thiamine hydrochloride 0.45 mg, biotin 0.45 mg, DL-methionine 0.15 g, soybean hydrochloride hydrolyzate (total nitrogen amount 0.2 g), calcium carbonate 50 g, The mixture was adjusted to 1 L with water and adjusted to pH 7.0) at 30 ° C. for 72 hours. After completion of the culture, each culture solution was centrifuged to obtain a culture supernatant.
- kanamycin glucose 120 g, magnesium sulfate heptahydrate 3 g, ammonium sulfate 30 g, potassium
- the culture supernatant (less than 9 mL) containing this Fc protein is filtered through a MILLEX-GV filter (0.22 ⁇ m, ⁇ 13 mm), and this is centrifuged with an ultrafiltration membrane (Amicon Ultra-4, 10 k MWCO) while being concentrated by PBS.
- the buffer solution was replaced with the above solution.
- 100 ⁇ L was used for refolding.
- 8M Guanidine-HCl in 20 mM sodium phosphate, pH 8.0 (300 ⁇ L) was added to the concentrate, mixed, and stirred at 37 ° C. for 1.5 h.
- the obtained product is purified with Protein A (Aspire Protein A Tips, Thermo), and the eluate is concentrated with an ultrafiltration membrane (Vivaspin 500, 10k MWCO) and substituted with PBS to have a lysine residue at the N-terminus.
- 100 ⁇ L of Fc protein (Lys-Fc) was obtained.
- the Fc protein in the obtained solution was calculated to be 0.69 mg / mL.
- SDS-PAGE Mini-PROTEAN TGX gel; non-reducing conditions; Bio-safe CBB G-250 staining
- an Fc protein having a lysine residue at the N-terminus can be prepared using cultured cells.
- Example 8 Method for producing Fc protein derivative to which unnatural cyclic peptide is added by SPAAC reaction (8-1) Target substance to which a ring having a triple bond between carbon atoms is added (unnatural cyclic peptide-DBCO Of adduct)
- the reaction mixture was purified by preparative HPLC (Inertsil ODS-3, ⁇ 20 ⁇ 250 mm, eluent A; 100 mM ammonium acetate aqueous solution, eluent B; acetonitrile, linear gradient from 33% B to 53% B), The obtained fraction was freeze-dried to obtain 9.8 mg of an unnatural cyclic peptide-DBCO adduct having the following formula.
- ESI-TOFMS positive mode
- the obtained reaction mixture was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, 4 to 20%, BIO-RAD; reducing conditions; stained with Coomassie Brilliant Blue G-250 Stain), and the results are shown in FIG. . From this result, it was found that the SPAAC reaction between this peptide and the azide group-containing Fc protein proceeds with extremely high reaction efficiency.
- Example 9 Method for producing Fc protein derivative to which non-natural linear peptide is added by SPAAC reaction (9-1) Target substance to which a ring having a triple bond between carbon atoms is added (non-natural linear peptide -DBCO adduct)
- reaction mixture was purified by preparative HPLC (Inertsil ODS-3, ⁇ 20 ⁇ 250 mm, eluent A: 100 mM ammonium acetate aqueous solution, eluent B: acetonitrile, linear gradient from 45% B to 65% B), The obtained fraction was freeze-dried to obtain 4.5 mg of an unnatural linear peptide-DBCO adduct having the following formula.
- ESI-TOFMS positive mode
- the obtained reaction mixture was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, 4-20%, BIO-RAD; reducing conditions; stained with Coomassie Brilliant Blue G-250 Stain), and the results are shown in FIG. . From this result, it was found that the SPAAC reaction between this peptide and the azide group-containing Fc protein proceeds with extremely high reaction efficiency.
- This reaction mixture was concentrated by ultrafiltration (Vivaspin 500, 10k MWCO) and diluted with 20 mM ammonium acetate (pH 6.5) five times to replace the buffer solution.
- Example 10 Method for producing Fc protein derivative to which oligonucleic acid is added by SPAAC reaction (10-1) of target substance (oligonucleic acid-DBCO adduct) to which a ring having a triple bond between carbon atoms is added Preparation
- oligonucleic acid (DNA, SEQ ID NO: 21) of the above formula as a target substance designed based on the report of Orava et al. (ACS Chem. Biol. 2013, 8, 170) was dissolved in 6.77 mL of water. 23.1 mixed solution of 10 mM Tris-HCl, 1 mM EDTA, pH 8.0, 23.1 mL and 0.12 M DTT aqueous solution and 0.5 M sodium phosphate buffer (pH 8.0) for 5.77 mL of solution 28 .8 mL was added and shaken overnight at room temperature. The reaction mixture was concentrated and diluted with water four times by ultrafiltration (Amicon Ultra-15, 3k MWCO), and the solvent was replaced.
- DBCO dibenzocyclooctyne
- DMSO 600 ⁇ L DMSO 600 ⁇ L were added and mixed, and the mixture was shaken at room temperature overnight.
- the reaction mixture was concentrated and diluted with water four times by ultrafiltration (Amicon Ultra-15, 3k MWCO), and the solvent was replaced.
- the resulting solution was lyophilized to obtain an oligonucleic acid-DBCO adduct of the following formula: Obtained 21.1 mg.
- ESI-TOFMS negative mode
- the obtained reaction mixture was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, 4-20%, BIO-RAD; reducing conditions; stained with Coomassie Brilliant Blue G-250 Stain), and the results are shown in FIG. . From this result, it was found that the SPAAC reaction between the present oligonucleic acid and the azide group-containing Fc protein proceeds with extremely high reaction efficiency.
- Example 11 Method for producing Fc protein derivative to which oligonucleic acid is added by SPAAC reaction (11-1) of target substance (oligonucleic acid-DBCO adduct) to which a ring having a triple bond between carbon atoms is added Preparation
- oligonucleic acid (DNA, SEQ ID NO: 22) of the above formula as a target substance designed based on a report by Potty et al. (Biopolymers 2009, 91 (2), 145) was dissolved in 5.55 mL of water. 18.2 mL of 10 mM Tris-HCl, 1 mM EDTA, pH 8.0 to 4.55 mL, and a 2: 1 mixed solution of 0.12 M DTT aqueous solution and 0.5 M sodium phosphate buffer (pH 8.0) 8 mL was added and shaken overnight at room temperature. The reaction mixture was concentrated and diluted with water four times by ultrafiltration (Amicon Ultra-15, 3k MWCO), and the solvent was replaced.
- DBCO dibenzocyclooctyne
- maleimide Tokyo Chemical Industries, 40 mM in DMSO
- 68.4 ⁇ L and DMSO 600 ⁇ L were added and mixed, and the mixture was shaken overnight at room temperature.
- the reaction mixture was concentrated and diluted with water four times by ultrafiltration (Amicon Ultra-15, 3k MWCO), and the solvent was replaced.
- the resulting solution was lyophilized to obtain an oligonucleic acid-DBCO adduct of the following formula: Obtained 24.7 mg.
- ESI-TOFMS negative mode
- the obtained reaction mixture was analyzed by SDS-PAGE (Mini-PROTEAN TGX gel, 4 to 20%, BIO-RAD; reducing conditions; stained with Coomassie Brilliant Blue G-250 Stain), and the results are shown in FIG. . From this result, it was found that the SPAAC reaction between the present oligonucleic acid and the azide group-containing Fc protein proceeds with extremely high reaction efficiency.
- the Fc protein derivative of the present invention is useful, for example, as a medicine or a reagent.
- the azide group-containing Fc protein of the present invention is useful, for example, as an intermediate in the production of the Fc protein derivative of the present invention.
- the Fc protein of the present invention having a peptide linker consisting of 16 amino acid residues at the N-terminus is useful, for example, as an intermediate in the production of the Fc protein derivative of the present invention.
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Abstract
Description
特許文献2には、native chemical ligation法により、目的ペプチドのチオエステル(R1-CO-SR)をN末端にシステイン残基を有するFcタンパク質(NH2-CH(CH2SH)-R2)と反応させて、目的ペプチドとFcタンパク質との融合タンパク質(R1-CO-NH-CH(CH2SH)-R2)を調製する方法が記載されている。
特許文献3には、還元アミノ化反応により、ホルミル基を有する目的ペプチド(R1-CH2-CHO)をアミノ基を有するFcタンパク質(H2N-R2)と反応させて、目的タンパク質とFcタンパク質との融合タンパク質(R1-CH2-CH2-NH-R2)を調製する方法が記載されている。
特許文献4には、セルフリーのタンパク質発現系において、任意の位置にアジド基を導入したFcタンパク質を調製し、次いでStrain-promoted azide-alkyne cyclization(SPAAC)反応によって、目的ペプチドとFcタンパク質との融合タンパク質を調製する方法が記載されている。
特許文献2に記載されるnative chemical ligation法については、目的タンパク質のチオエステルを大過剰用いてもFcタンパク質に対する目的タンパク質のモノ付加体とジ付加体の混合物が取得されており、反応効率と精製の煩雑さの点で課題がある。
特許文献3に記載される還元アミノ化反応は、反応効率の点で課題があり、また、本反応で用いられるsodium cyanoborohydrideがタンパク質側鎖の化学変換という副反応を引き起こすという課題がある。
特許文献4に記載される方法については、セルフリーのタンパク質発現系の原料の入手性及びコスト面から、実用的な方法とは言い難いという課題がある。
〔1〕下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、アジド基含有Fcタンパク質。
〔2〕前記ペプチドリンカーが4~30個のアミノ酸残基からなる、〔1〕のアジド基含有Fcタンパク質。
〔3〕前記ペプチドリンカーが16個のアミノ酸残基からなる、〔2〕のアジド基含有Fcタンパク質。
〔4〕前記式(1)で表されるアジド基含有Fcタンパク質が、下記式(1-1):
N3、La、Lb及びFcは、前記式(1)と同じであり、
ベンゼン環は、さらに置換されていてもよい。〕で表される、〔1〕~〔3〕のいずれかのアジド基含有Fcタンパク質。
〔5〕Fcタンパク質が哺乳動物抗体のFc領域に由来する、〔1〕~〔4〕のいずれかのアジド基含有Fcタンパク質。
〔6〕哺乳動物抗体がヒト抗体である、〔5〕のアジド基含有Fcタンパク質。
〔7〕Fcタンパク質がIgG抗体のFc領域に由来する、〔1〕~〔6〕のいずれかのアジド基含有Fcタンパク質。
〔8〕Fcタンパク質が、下記(a)~(c)からなる群より選ばれる、〔1〕~〔7〕のいずれかのアジド基含有Fcタンパク質:
(a)配列番号1のアミノ酸配列を含むタンパク質;
(b)配列番号1のアミノ酸配列において、アミノ酸残基の欠失、置換、付加及び挿入からなる群より選ばれる1又は数個のアミノ酸残基の変異を含むアミノ酸配列を含むタンパク質;並びに
(c)配列番号1のアミノ酸配列に対して少なくとも90%以上の相同性を有するアミノ酸配列を含むタンパク質。
〔9〕アジド基含有Fcタンパク質の製造方法であって、
フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、
下記式(2):
N3-La-Phe (2)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体を示す。〕で表される、アジド基を含有するフェニルアラニン誘導体を、
下記式(3):
Lb-Fc (3)
〔式中、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、リジン残基又はアルギニン残基をN末端に有するFcタンパク質と反応させて、
下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3及びLaは、前記式(2)と同じであり、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lb及びFcは、前記式(3)と同じである。〕で表されるアジド基含有Fcタンパク質を生成することを含む、方法。
〔10〕下記式(4):
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環Aは、トリアゾールと縮合している環を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、目的物質が付加されたFcタンパク質誘導体。
〔11〕環Aが、7~9員の単環、又は7~9員の単環と他の環との縮合環である、〔10〕のFcタンパク質誘導体。
〔12〕目的物質がポリマー系物質である、〔10〕又は〔11〕のFcタンパク質誘導体。
〔13〕目的物質が、ペプチド、サッカリド、又はヌクレオチドである、〔10〕~〔12〕のいずれかのFcタンパク質誘導体。
〔14〕目的物質が、システイン残基をC末端に有するペプチドである、〔10〕~〔13〕のいずれかのFcタンパク質誘導体。
〔15〕目的物質が付加されたFcタンパク質誘導体の製造方法であって、
下記式(5):
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環aは、炭素原子間3重結合を有する環を示す。〕で表される、炭素原子間3重結合を有する環が付加されている目的物質を、
下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表されるアジド基含有Fcタンパク質と反応させて、
下記式(4):
S及びLは、前記式(5)と同じであり、
環Aは、トリアゾールと縮合している環を示し、
La、Phe、Lb、及びFcは、前記式(1)と同じである。〕で表される、目的物質が付加されたFcタンパク質誘導体を生成することを含む、方法。
〔16〕炭素原子間3重結合を有する環が、7~9員環、又は7~9員の単環と他の環との縮合環である、〔15〕の方法。
〔17〕目的物質を、炭素原子間3重結合を有する環を含む試薬と反応させて、炭素原子間3重結合を有する環が付加されている目的物質を生成することをさらに含む、〔15〕又は〔16〕の方法。
〔18〕下記(A)及び(B)を含む、目的物質が付加されたFcタンパク質誘導体の製造方法:
(A)フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、
下記式(2):
N3-La-Phe (2)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体を示す。〕で表される、アジド基を含有するフェニルアラニン誘導体を、
下記式(3):
Lb-Fc (3)
〔式中、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、リジン残基又はアルギニン残基をN末端に有するFcタンパク質と反応させて、
下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3及びLaは、前記式(2)と同じであり、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lb及びFcは、前記式(3)と同じである。〕で表されるアジド基含有Fcタンパク質を生成すること;並びに
(B)下記式(5):
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環aは、炭素原子間3重結合を有する環を示す。〕で表される、炭素原子間3重結合を有する環が付加されている目的物質を、
前記式(1)で表されるアジド基含有Fcタンパク質と反応させて、
下記式(4):
S及びLは、前記式(5)と同じであり、
環Aは、トリアゾールと縮合している環を示し、
La、Phe、Lb、及びFcは、前記式(1)と同じである。〕で表される、目的物質が付加されたFcタンパク質誘導体を生成すること。
〔19〕16個のアミノ酸残基からなるペプチドリンカーをN末端に有する、Fcタンパク質。
〔20〕ペプチドリンカーのN末端アミノ酸残基が、リジン残基又はアルギニン残基である、〔19〕のFcタンパク質。
〔21〕N末端アミノ酸残基がリジン残基又はアルギニン残基である16個のアミノ酸残基からなるペプチドリンカーを介して、アジド基を含有するフェニルアラニン誘導体残基をN末端に有する、アジド基含有Fcタンパク質。
〔22〕N末端アミノ酸残基がリジン残基又はアルギニン残基である16個のアミノ酸残基からなるペプチドリンカーを介して、アジド基を含有するフェニルアラニン誘導体残基をN末端に有する、アジド基含有Fcタンパク質の製造方法であって、
フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、アジド基を含有するフェニルアラニン誘導体を、前記ペプチドリンカーをN末端に有するFcタンパク質と反応させて、前記アジド基含有Fcタンパク質を生成することを含む、方法。
16個のアミノ酸残基からなるペプチドリンカーをN末端に有する本発明のFcタンパク質は、目的物質との反応効率に優れる。
本発明は、アジド基含有Fcタンパク質を提供する。
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕
(i)炭化水素基、ハロゲン原子(例、フッ素原子、塩素原子、臭素原子、ヨウ素原子)、グアニジノ、若しくはシアノ;
(ii)Rb-O-、Rb-C(=O)-、Rb-O-C(=O)-、若しくはRb-C(=O)-O-〔(ii)におけるRbは、水素原子、又は炭化水素基を示す〕;又は
(iii)NRb1Rb2-、NRb1Rb2-C(=O)-、NRb1Rb2-C(=O)-O-、若しくはRb1-C(=O)-NRb2-〔(iii)におけるRb1及びRb2は、同一若しくは異なって、水素原子、若しくは炭化水素基を示す〕。
(1)KVDKKVEPKSSDKTHT(配列番号8)のアミノ酸配列からなるペプチド;又は
(2)KVDKKVEPKSSDKTHT(配列番号8)のアミノ酸配列において、アミノ酸残基の欠失、置換、付加及び挿入からなる群より選ばれる1若しくは2個のアミノ酸残基の変異を含むアミノ酸配列からなるペプチド。
(a)配列番号1のアミノ酸配列を含むタンパク質;
(b)配列番号1のアミノ酸配列において、アミノ酸残基の欠失、置換、付加及び挿入からなる群より選ばれる1又は数個のアミノ酸残基の変異を含むアミノ酸配列を含むタンパク質;並びに
(c)配列番号1のアミノ酸配列に対して少なくとも90%以上の相同性を有するアミノ酸配列を含むタンパク質。
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示し、
ベンゼン環は、さらに置換されていてもよい。〕
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体を示す。〕
〔式中、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕
本発明はさらに、目的物質が付加されたFcタンパク質誘導体を提供する。
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環Aは、トリアゾールと縮合している環を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環Aは、トリアゾールと縮合している環を示し、
Laは、結合又は2価の基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環A’は、トリアゾールと縮合している8員環を示し、
X及びYの一方は、CH2を示し、他方はCH2、NH、O、又はSを示し、
R1~R4は、同一又は異なって、水素原子、又は置換基を示し、
あるいは、R1及びR2は一緒になって、置換基を有する環を形成していてもよく、R3及びR4は一緒になって、置換基を有する環を形成していてもよく、
環A’における実線及び破線からなる二重線は、単結合又は二重結合を示し、
Laは、結合又は2価の基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環a’は、炭素原子間3重結合を有する8員環を示し、
X及びYの一方は、CH2を示し、他方はCH2、NH、O、又はSを示し、
R1~R4は、同一又は異なって、水素原子、又は置換基を示し、
あるいは、R1及びR2は一緒になって、置換基を有する環を形成していてもよく、R3及びR4は一緒になって、置換基を有する環を形成していてもよく、
環A’における実線及び破線からなる二重線は、単結合又は二重結合を示す。〕
(A)フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、アジド基を含有するフェニルアラニン誘導体を、リジン残基又はアルギニン残基をN末端に有するFcタンパク質と反応させて、アジド基含有Fcタンパク質を生成すること;並びに
(B)炭素原子間3重結合を有する環が付加されている目的物質を、アジド基含有Fcタンパク質と反応させて、Fcタンパク質誘導体を生成すること。
本発明は、16個のアミノ酸残基からなるペプチドリンカーをN末端に有する、Fcタンパク質を提供する。
HEK293細胞にてCys-Fc(配列番号1のアミノ酸配列からなるヒトIgG1由来ポリペプチド)の発現を行なった。HEK293細胞を、pSecTag2/HygroA(Thermofisher Scientific)に配列番号2のアミノ酸配列からなるポリペプチドをコードする遺伝子を導入した発現ベクターでOpti-MEMI(Thermofisher Scientific)培地中で形質転換した。配列番号2のアミノ酸配列からなるポリペプチドをコードする遺伝子は、配列番号1のアミノ酸配列からなるポリペプチドのN末端にリーダー配列〔METDTLLLWVLLLWVPGSTG(配列番号3)〕が付加されたタンパク質をコードする。形質転換細胞から分泌されるタンパク質は、リーダー配列直後のシグナル切断部位で切断されるので、培養上清中にはCys-Fc(配列番号1のアミノ酸配列からなるポリペプチド)が分泌される。得られた形質転換細胞を、37℃、CO2濃度8%の条件下で5日間回転培養(125rpm)した。遠心分離により培養上清を取得し、HiTrap Protein A FF (1mL,GE Healthcare)にて精製した。その溶出液をSDS-PAGE(Mini-PROTEAN TGX gel、還元条件下、Bio-safe CBB G-250染色)で分析した結果を図2に示す。また、得られたCys-Fcを、以下の手順によりESI-TOFMS分析した。得られたCys-FcをPNGase F(NEW ENGLAND BioLabs,カタログ番号P0704)を用い、製造者プロトコルに従って糖鎖切断を行なった。Cys-Fc(40μg)の溶液にキット添付のGlycoBuffer2(10x、8μL)を添加し、水を添加して80μLとした。ここに、水で10倍希釈したPNGase F溶液を4μL加え、混合した後に37℃で24時間インキュベートした。ここに終濃度0.2%となるようTFA(トリフルオロ酢酸)を加え、37℃で30分間インキュベートした後、これを限外濾過(Vivaspin500,10k MWCO)を用いて20mM 酢酸アンモニウム(pH6.5)へ緩衝液置換した。その溶液5μLに2mM TCEP(トリス(2-カルボキシエチル)ホスフィン)水溶液(3.5μL)と水(11.5μL)を加えて混合し、室温にて1時間静置した後にESI-TOFMS分析した。結果を以下に示す。
Cys-Fcの分子量:
理論値:24836.9
実測値:24834.5
下記に示したペプチドリンカーチオエステルは、全て同様の方法にて調製した。Fmoc法による2-クロロトリチル樹脂を用いたペプチド固相合成によって、N末端Boc保護の保護ペプチドを調製し、20%HFIP(1,1,1,3,3,3-ヘキサフルオロ-2-プロパノール)/ジクロロメタン溶液にて保護ペプチドを切り出した。これを濃縮し、ジクロロメタン溶液とした上で、HOSu(N-ヒドロキシスクシンイミド)(10モル当量)、DIPCI(N,N’-ジイソプロピルカルボジイミド)(10モル当量)、チオフェノール(30モル当量)、DIPEA(N,N-ジイソプロピルエチルアミン)(10モル当量)を加え、室温にて2晩撹拌した。反応混合物を水で洗浄した後に濃縮した。この反応混合物をTFA/TIS(トリイソプロピルシラン)/水=95/2.5/2.5に溶解させ、室温にて3時間撹拌した。反応混合物を濃縮した後に、ジクロロメタンと水を加えて混合し、水層を分取HPLCにて精製し、ペプチドリンカーチオエステルを取得した。
Fc(4)用リンカー: KTHT(配列番号4)-SPh
Fc(8)用リンカー: KSSDKTHT(配列番号5)-SPh
Fc(12)用リンカー: KVEPKSSDKTHT(配列番号6)-SPh
Fc(13)用リンカー: KKVEPKSSDKTHT(配列番号7)-SPh
Fc(16)用リンカー:KVDKKVEPKSSDKTHT(配列番号8)-SPh
(Phは、フェニルを示し、SPhは、フェニルチオを示す)
Fcタンパク質は、特許文献(米国特許第7,404,956号明細書)および非特許文献(Proc.Jap.Acad.Ser.B,2011,603)に従って調製した。1.0mM TCEP-HClと10mM MPAA(4-メルカプトフェニル酢酸)を含む50mM MES緩衝液(pH6.5)に、0.02mM Cys-Fc(実施例1で調製したもの)と0.4mM ペプチドリンカーチオエステル(実施例2で調製したもの)を溶解し、25℃にて1晩混合した。反応液をVivaspin 500(10k MWCO, Sartorius)にて20mM 酢酸緩衝液(pH5.5)に置換し、Resource S(1mL,GE Healthcare)にて精製した。
Fc(4):KTHT(配列番号4)-Fcタンパク質(配列番号1)
Fc(8):KSSDKTHT(配列番号5)-Fcタンパク質(配列番号1)
Fc(12):KVEPKSSDKTHT(配列番号6)-Fcタンパク質(配列番号1)
Fc(13):KKVEPKSSDKTHT(配列番号7)-Fcタンパク質(配列番号1)
Fc(16):KVDKKVEPKSSDKTHT(配列番号8)-Fcタンパク質(配列番号1)
(ペプチドリンカーとFcタンパク質はアミド結合を介して結合している。ペプチドリンカーチオエステルとFcタンパク質のN末端システイン残基のアミノ基とが反応して、アミド結合を生じるためである。)
N末端にリジン残基を有するFcタンパク質とフェニルアラニン誘導体との反応に用いる二種の酵素およびtRNAを調製した。具体的には、Leucyl/phenylalanyl-tRNA-protein transferase(L/F-Transferase)は、非特許文献(ChemBioChem 2006,1676;J.Biol.Chem.1995,20631)記載の方法で調製した。Double-mutated ARSは、非特許文献(ChemBioChem 2009,2460;J.Am.Chem.Soc.2002,5652;ChemBioChem 1991,99)に従って調製した。tRNAPheは、非特許文献(ChemBioChem 2009,2460;Nucleic Acids Res 1996,907)に従って調製した。
(5-1)炭素原子間3重結合を有する環が付加されている目的物質の調製
PEGを目的物質として、炭素原子間3重結合を有する環が付加されている目的物質(PEG-DIBAC)を以下の手順で調製した。DIBAC acid(5-(5,6-Dihydro-11,12-didehydrodibenzo[b,f]azocin-5(6H)-yl)-5-oxopentanoic acid)16.1mgをジクロロメタン1mLに溶解し、EDC-HCl 14.7mg、HOBt-H2O 11.7mg、ジイソプロピルエチルアミン 17.5μLを加え、メトキシポリエチレングリコールプロピルアミン(SUNBRIGHT MEPA-20H)102.2mgを加え、室温にて一晩混合した。反応混合物を飽和塩化アンモニウム水溶液と飽和食塩水にて洗浄した後に溶媒を留去し、シリカゲルカラムクロマトグラフィーにて精製し、PEG-DIBACを94mg取得した。
反応容器に、溶液A(500mM HEPES、pH7.6、100mM MgCl2、10mMスペルミジン)4μLと溶液B(25mM ATP、200mM KCl)4μLを取り、ここにtRNAPhe水溶液(0.10 O.D./μL)2μL、double-mutant aminoacyl-tRNA synthetase溶液(17.8μM)4.5μL、L/F-transferase(39μM)2.1μL、4-アジドフェニルアラニン(1mM)14.5μL、水3.4μLを加え、混合した。ここに実施例3で得られた各種鎖長の上記ペプチドリンカーを有するFcタンパク質溶液(1.2~2.3mg/mL)を5.5μL加えて混合し、37℃にて5時間振とうした。これにより、4-アジドフェニルアラニンと上記Fcタンパク質とが反応したアジド基含有Fcタンパク質が得られた。
(5-2)で得られた反応液に(5-1)で得られたPEG-DIBACのDMSO溶液(2mM)30μLを加え、25℃にて一晩振とうした。これにより、アジド基含有Fcタンパク質とPEG-DIBACとが反応してPEG化Fcタンパク質が生成した(DIBACに対するアジド基の付加様式は下記式に示す2とおりが考えられる)。
目的物質として、配列番号9のアミノ酸配列からなるペプチド(Exenatide-Cys:Exenatideというペプチド医薬のC末端にシステインを付加したペプチド)を、ペプチド固相合成法により調製した。
(6-1)アジド基含有Fcタンパク質の調製
反応容器に、溶液A(500mM HEPES、pH7.6、100mM MgCl2、10mMスペルミジン)16μLと溶液B(25mM ATP、200mM KCl)16μLを取り、ここにtRNAPhe水溶液(0.10 O.D./μL)8μL、double-mutant aminoacyl-tRNA synthetase溶液(17.8μM) 18μL、L/F-transferase(39μM)8.2μL、4-アジドフェニルアラニン(11mM)58.2μL、水19μLを加え、混合した。ここにFc(16)溶液(2.5mg/mL)を16.6μL加えて混合し、37℃にて6時間振とうした。これにより、下記式に示す4-アジドフェニルアラニンとFc(16)とが反応したアジド基含有Fcタンパク質が得られた。
Fc(16)の分子量:
理論値:26645.9
実測値:26643.8
アジド基含有Fcタンパク質の分子量:
理論値:26834.1
(アジド基還元体の理論値:26808.1)
実測値:26805.7
配列番号9のアミノ酸配列からなるペプチドを目的物質として、炭素原子間3重結合を有する環が付加されている目的物質(ペプチド-DBCO付加体)を以下の手順で調製した。配列番号9のアミノ酸配列からなるペプチド7.6mgに、0.1Mリン酸ナトリウム緩衝液(pH7.0)818μLを加え、ここにDBCO(ジベンゾシクロオクチン)-マレイミド(Tokyo Chemical Industries,40mM in DMSO)88μLを加えて混合し、25℃にて4時間振とうした。これを限外濾過(Amicon Ultra-4, 3k MWCO)にて濃縮と水希釈を4回繰り返し、得られた水溶液を凍結乾燥してペプチド-DBCO付加体を7.1mg取得した。
ESI-MS(positive mode) m/z;1572.5、1179.9、944.0、786.9
(6-1)で取得したアジド基含有Fcタンパク質の溶液4μLに、0.1Mリン酸ナトリウム緩衝液(pH7.0)7.6μLと、(6-2)で取得した0.10mMペプチド(配列番号9)-DBCO付加体溶液1.5μL(アジド基含有Fcタンパク質の量に対して2当量のペプチド(配列番号9)-DBCO付加体を含有)を加え、25℃にて一晩振とうした。これにより、アジド基含有Fcタンパク質とペプチド(配列番号9)-DBCO付加体とが反応した、ペプチド(配列番号9)が付加されたFcタンパク質誘導体が得られた(DBCOに対するアジド基の付加様式は下記式に示す2とおりが考えられる)。
ペプチド(配列番号9)が付加されたFcタンパク質誘導体の分子量:
理論値:31551.3
(加水分解体の理論値:31569.3)
実測値:31567.3
(7-1)YDK0107株の構築
国際公開第2014/126260号に記載の、生理活性ペプチドであるTeriparatideの分泌発現プラスミドpPKK50TEV-Teriを用いて、国際公開第2002/081694号に記載のC.glutamicum YDK010株を形質転換した。なお、pPKK50TEV-Teriは生理活性ペプチドであるTeriparatideの分泌発現用ベクターであって、C.glutamicum ATCC13869株のcspB遺伝子のプロモーター領域、同プロモーターの下流に発現可能に連結された同株のCspBシグナルペプチド、同株の成熟CspBのN末端50アミノ酸残基、ProTEVプロテアーゼの認識配列ENLYFQ(配列番号10)、およびTeriparatideの融合タンパク質(以下、CspB50TEV-Teriと表記する)をコードする塩基配列を有するプラスミドである(国際公開第2014/126260号)。C.glutamicum YDK010株は、C.glutamicum AJ12036(FERM BP-734)の細胞表層タンパク質CspBの欠損株である(国際公開第2002/081694号)。得られた形質転換体を、25mg/Lのカナマイシンを含むCMDex寒天培地(グルコース 5g、硫酸マグネシウム七水和物 0.4g、硫酸鉄七水和物 0.01g、硫酸マンガン五水和物 0.01g、リン酸二水素カリウム 1g、ビオチン 10μg、DifcoTM Select Soytone(Becton Dickinson) 10g、BactoTM Yeast Extract(Becton Dickinson) 10g、尿素 3g、大豆塩酸加水分解液(全窒素量 1.2g)、寒天抹 20g、水で1LにしてpH6.5に調整)上で30℃で培養してコロニーを形成させた。
(a)pPK4ベクター中のNaeI認識サイトを改変したベクター(pPK5)の構築
特開平9-322774号公報に記載のpPK4の中には、制限酵素NaeIの認識配列が一ヵ所存在する。この配列を改変するため、NaeI認識配列gccggcをgcaggcに改変した配列とpPK4におけるその周辺配列を含む配列番号11および配列番号12に記載のプライマーを合成した。次に、pPK4を鋳型として、配列番号11と配列番号12に記載のプライマーを用いて、約5.6kbpのプラスミド全長をPCR法によって増幅した。PCR反応にはPyrobest(登録商標) DNA polymerase(Takara Bio)を用い、反応条件は95℃ 5分、(95℃ 30秒、55℃ 1分、72℃ 12分)x12cycleで行った。
次に、国際公開第2005/103278号に記載のTat系分泌装置の増幅プラスミドであるpVtatABCを鋳型にして、配列番号13および配列番号14に記載のプライマーを用いて、tatABC遺伝子をコードする配列を含む約3.7kbpのDNA断片をPCR法によって増幅した。配列番号14に記載のプライマーには制限酵素KpnIとApaIの認識配列がデザインしてある。PCRにはPyrobest(登録商標) DNA polymerase(Takara Bio)を用い、反応条件は業者の推奨するプロトコルに従った。このDNA断片の末端をBKL Kit(Takara Bio)を用いてリン酸化し、別途KpnI処理し、さらにBKL Kit(TakaraBio)を用いて平滑末端化し、さらにCIAP(Takara Bio)を用いて末端を脱リン酸化処理したpPK5ベクターに挿入することによって、tatABC遺伝子搭載ベクターであるpPK5-tatABCを構築した。ライゲーション反応にはDNA Ligation Kit Ver.2.1(Takara Bio)を用い、反応条件は業者の推奨するプロトコルに従った。挿入断片の塩基配列決定の結果、予想通りの遺伝子が挿入されていることを確認した。塩基配列の決定はBigDye(登録商標) Terminator v3.1 Cycle Sequencing Kit(Applied Biosystems)と3130 Genetic Analyzer(Applied Biosystems)を用いて行った。
前項で構築したpPK5-tatABCプラスミド中のtatABC遺伝子領域の中には、制限酵素KpnIおよびXbaIの認識配列が1ヵ所ずつ存在する。これらの配列を改変するため、KpnI認識配列ggtaccをggaaccに改変した配列とpPK5-tatABCにおけるその周辺配列を含む配列番号15および配列番号16に記載のプライマーと、XbaI認識配列tctagaをtgtagaに改変した配列とpPK5-tatABCにおけるその周辺配列を含む配列番号17および配列番号18に記載のプライマーを合成した。
(7-2)に記されているpPK6にLys-Fcの遺伝子(配列番号19および配列番号20)を導入した発現ベクターを作製し、これを用いて(7-1)で得られたCorynebacterium glutamicum YDK0107株を形質転換した。得られた各形質転換体を、25mg/Lのカナマイシンを含むMMTG液体培地(グルコース 120g、硫酸マグネシウム七水和物 3g、硫酸アンモニウム 30g、リン酸二水素カリウム 1.5g、硫酸鉄七水和物 0.03g、硫酸マンガン五水和物 0.03g、チアミン塩酸塩 0.45mg、ビオチン 0.45mg、DL-メチオニン 0.15g、大豆塩酸加水分解液(全窒素量 0.2g)、炭酸カルシウム 50g、水で1LにしてpH7.0に調整)で30℃、72時間培養した。培養終了後、各培養液を遠心分離して培養上清を取得した。
(8-1)炭素原子間3重結合を有する環が付加されている目的物質(非天然環状ペプチド-DBCO付加体)の調製
アジド基含有Fcタンパク質の溶液6.6μL(アジド基含有Fcタンパク質50μg含有)に、0.1Mリン酸ナトリウム緩衝液(pH7.0)24.4μLと、2.5mMの(8-1)で得られた非天然環状ペプチド-DBCO付加体の水溶液7.4μLを加え、25℃にて一晩振とうした。これにより、アジド基含有Fcタンパク質と非天然環状ペプチド-DBCO付加体とが反応し、非天然環状ペプチドが付加されたFcタンパク質誘導体が得られた(DBCOに対するアジド基の付加様式は下記式に示す2とおりが考えられる)。
非天然環状ペプチドが付加されたFcタンパク質誘導体(G0糖鎖付き)の分子量:
理論計算値 :29413.7
ESI-TOFMS測定値:29412.5
(9-1)炭素原子間3重結合を有する環が付加されている目的物質(非天然直鎖ペプチド-DBCO付加体)の調製
アジド基含有Fcタンパク質の溶液6.6μL(アジド基含有Fcタンパク質50μg含有)に、0.1Mリン酸ナトリウム緩衝液(pH7.0)4.8μLおよび水20μLと、2.5mMの(9-1)で得られた非天然直鎖ペプチド-DBCO付加体の溶液7.4μLを加え、25℃にて19時間振とうした。その後更に水20μLとDMSO6μLを加えて25℃にて4時間振とうした。これにより、アジド基含有Fcタンパク質と非天然直鎖ペプチド-DBCO付加体とが反応し、非天然直鎖ペプチドが付加されたFcタンパク質誘導体が得られた(DBCOに対するアジド基の付加様式は下記式に示す2とおりが考えられる)。
非天然直鎖ペプチドが付加されたFcタンパク質誘導体(G0糖鎖付き)の分子量:
理論計算値 :30340.2
ESI-TOFMS測定値:30339.5
(10-1)炭素原子間3重結合を有する環が付加されている目的物質(オリゴ核酸-DBCO付加体)の調製
アジド基含有Fcタンパク質の溶液6.6μL(アジド基含有Fcタンパク質50μg含有)に、0.1Mリン酸ナトリウム緩衝液(pH7.0)24.4μLと2.5mMの(10-1)で得られた付加体の溶液7.4μLを加え、25℃にて一晩振とうした。これにより、アジド基含有Fcタンパク質とオリゴ核酸-DBCO付加体とが反応し、目的物質が付加されたFcタンパク質誘導体が得られた(DBCOに対するアジド基の付加様式は下記式に示す2とおりが考えられる)。
(11-1)炭素原子間3重結合を有する環が付加されている目的物質(オリゴ核酸-DBCO付加体)の調製
アジド基含有Fcタンパク質の溶液6.6μL(アジド基含有Fcタンパク質50μg含有)に、0.1Mリン酸ナトリウム緩衝液(pH7.0)24.4μLと2.5mMの(11-1)で得られた付加体の溶液7.4μLを加え、25℃にて一晩振とうした。これにより、アジド基含有Fcタンパク質とオリゴ核酸-DBCO付加体とが反応し、目的物質が付加されたFcタンパク質誘導体が得られた(DBCOに対するアジド基の付加様式は下記式に示す2とおりが考えられる)。
本発明のアジド基含有Fcタンパク質は、例えば、本発明のFcタンパク質誘導体の製造における中間体として有用である。
16個のアミノ酸残基からなるペプチドリンカーをN末端に有する本発明のFcタンパク質は、例えば、本発明のFcタンパク質誘導体の製造における中間体として有用である。
Claims (22)
- 下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、アジド基含有Fcタンパク質。 - 前記ペプチドリンカーが4~30個のアミノ酸残基からなる、請求項1記載のアジド基含有Fcタンパク質。
- 前記ペプチドリンカーが16個のアミノ酸残基からなる、請求項2記載のアジド基含有Fcタンパク質。
- Fcタンパク質が哺乳動物抗体のFc領域に由来する、請求項1~4のいずれか一項記載のアジド基含有Fcタンパク質。
- 哺乳動物抗体がヒト抗体である、請求項5記載のアジド基含有Fcタンパク質。
- Fcタンパク質がIgG抗体のFc領域に由来する、請求項1~6のいずれか一項記載のアジド基含有Fcタンパク質。
- Fcタンパク質が、下記(a)~(c)からなる群より選ばれる、請求項1~7のいずれか一項記載のアジド基含有Fcタンパク質:
(a)配列番号1のアミノ酸配列を含むタンパク質;
(b)配列番号1のアミノ酸配列において、アミノ酸残基の欠失、置換、付加及び挿入からなる群より選ばれる1又は数個のアミノ酸残基の変異を含むアミノ酸配列を含むタンパク質;並びに
(c)配列番号1のアミノ酸配列に対して少なくとも90%以上の相同性を有するアミノ酸配列を含むタンパク質。 - アジド基含有Fcタンパク質の製造方法であって、
フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、
下記式(2):
N3-La-Phe (2)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体を示す。〕で表される、アジド基を含有するフェニルアラニン誘導体を、
下記式(3):
Lb-Fc (3)
〔式中、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、リジン残基又はアルギニン残基をN末端に有するFcタンパク質と反応させて、
下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3及びLaは、前記式(2)と同じであり、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lb及びFcは、前記式(3)と同じである。〕で表されるアジド基含有Fcタンパク質を生成することを含む、方法。 - 環Aが、7員若しくは8員環、又は7員若しくは8員環と他の環との縮合環である、請求項10記載のFcタンパク質誘導体。
- 目的物質がポリマー系物質である、請求項10又は11記載のFcタンパク質誘導体。
- 目的物質が、ペプチド、サッカリド、又はヌクレオチドである、請求項10~12のいずれか一項記載のFcタンパク質誘導体。
- 目的物質が、システイン残基をC末端に有するペプチドである、請求項10~13のいずれか一項記載のFcタンパク質誘導体。
- 目的物質が付加されたFcタンパク質誘導体の製造方法であって、
下記式(5):
〔式中、
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環aは、炭素原子間3重結合を有する環を示す。〕で表される、炭素原子間3重結合を有する環が付加されている目的物質を、
下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表されるアジド基含有Fcタンパク質と反応させて、
下記式(4):
〔式中、
S及びLは、前記式(5)と同じであり、
環Aは、トリアゾールと縮合している環を示し、
La、Phe、Lb、及びFcは、前記式(1)と同じである。〕で表される、目的物質が付加されたFcタンパク質誘導体を生成することを含む、方法。 - 炭素原子間3重結合を有する環が、7員若しくは8員環、又は7員若しくは8員環と他の環との縮合環である、請求項15記載の方法。
- 目的物質を、炭素原子間3重結合を有する環を含む試薬と反応させて、炭素原子間3重結合を有する環が付加されている目的物質を生成することをさらに含む、請求項15又は16記載の方法。
- 下記(A)及び(B)を含む、目的物質が付加されたFcタンパク質誘導体の製造方法:
(A)フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、
下記式(2):
N3-La-Phe (2)
〔式中、
N3は、アジド基を示し、
Laは、結合又は2価の基を示し、
Pheは、フェニルアラニン又はその誘導体を示す。〕で表される、アジド基を含有するフェニルアラニン誘導体を、
下記式(3):
Lb-Fc (3)
〔式中、
Lbは、リジン残基若しくはアルギニン残基、又はリジン残基若しくはアルギニン残基をN末端に有する2個以上のアミノ酸残基からなるペプチドリンカーを示し、
Fcは、Fcタンパク質を示す。〕で表される、リジン残基又はアルギニン残基をN末端に有するFcタンパク質と反応させて、
下記式(1):
N3-La-Phe-Lb-Fc (1)
〔式中、
N3及びLaは、前記式(2)と同じであり、
Pheは、フェニルアラニン又はその誘導体の残基を示し、
Lb及びFcは、前記式(3)と同じである。〕で表されるアジド基含有Fcタンパク質を生成すること;並びに
(B)下記式(5):
〔式中、
Sは、目的物質を示し、
Lは、結合又は2価の基を示し、
環aは、炭素原子間3重結合を有する環を示す。〕で表される、炭素原子間3重結合を有する環が付加されている目的物質を、
前記式(1)で表されるアジド基含有Fcタンパク質と反応させて、
下記式(4):
〔式中、
S及びLは、前記式(5)と同じであり、
環Aは、トリアゾールと縮合している環を示し、
La、Phe、Lb、及びFcは、前記式(1)と同じである。〕で表される、目的物質が付加されたFcタンパク質誘導体を生成すること。 - 16個のアミノ酸残基からなるペプチドリンカーをN末端に有する、Fcタンパク質。
- ペプチドリンカーのN末端アミノ酸残基が、リジン残基又はアルギニン残基である、請求項19記載のFcタンパク質。
- N末端アミノ酸残基がリジン残基又はアルギニン残基である16個のアミノ酸残基からなるペプチドリンカーを介して、アジド基を含有するフェニルアラニン誘導体残基をN末端に有する、アジド基含有Fcタンパク質。
- N末端アミノ酸残基がリジン残基又はアルギニン残基である16個のアミノ酸残基からなるペプチドリンカーを介して、アジド基を含有するフェニルアラニン誘導体残基をN末端に有する、アジド基含有Fcタンパク質の製造方法であって、
フェニルアラニルtRNA、アミノアシルtRNA合成酵素及びロイシル/フェニルアラニルtRNA転移酵素を用いて、アジド基を含有するフェニルアラニン誘導体を、前記ペプチドリンカーをN末端に有するFcタンパク質と反応させて、前記アジド基含有Fcタンパク質を生成することを含む、方法。
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| WO2019240287A1 (ja) * | 2018-06-14 | 2019-12-19 | 味の素株式会社 | 抗体に対する親和性物質、切断性部分および反応性基を有する化合物またはその塩 |
| WO2019240288A1 (ja) | 2018-06-14 | 2019-12-19 | 味の素株式会社 | 抗体に対する親和性物質、および生体直交性官能基を有する化合物またはその塩 |
| WO2022191283A1 (ja) | 2021-03-11 | 2022-09-15 | 味の素株式会社 | 化合物またはその塩、およびそれらにより得られる抗体 |
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| MASUMI TAKI: "L/F-Ten'i Koso o Mochiita Tanpakushitsu N Mattan eno Kinosei Hi Tennen Amino-san Donyu", NEWS LETTER, vol. 23, no. 3, 30 November 2008 (2008-11-30), pages 3 - 6, XP009516435 * |
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| See also references of EP3453758A4 |
| TAKI MASUMI: "Leucyl/Phenylalanyl(L/F)-tRNA- Protein Transferase-Mediated Aminoacyl Transfer of a Nonnatural Amino Acide to the N-Terminus of Peptides and Proteins and Subsequent Functionalization by Bioorthogonal Reactions", PEPTIDE SCIENCE, vol. 88, 10 January 2007 (2007-01-10), pages 263 - 271, XP055557394 * |
| TAKI MASUMI: "Leucyl/Phenylalanyl-tRNA-Protein Transferase-Mediated Chemoenzymatic Coupling of N-Terminal Arg/Lys Inits in Post- translationally Processed Proteins with Non- natural Amino Acids", CHEMBIOCHEM, vol. 7, 2006, pages 1676 - 1679, XP055557402 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018199337A1 (ja) * | 2017-04-28 | 2018-11-01 | 味の素株式会社 | 可溶性タンパク質に対する親和性物質、切断性部分および反応性基を有する化合物またはその塩 |
| US12024549B2 (en) | 2017-04-28 | 2024-07-02 | Ajinomoto Co., Inc. | Compound having affinity substance to soluble protein, cleavable portion and reactive group, or salt thereof |
| WO2019240287A1 (ja) * | 2018-06-14 | 2019-12-19 | 味の素株式会社 | 抗体に対する親和性物質、切断性部分および反応性基を有する化合物またはその塩 |
| WO2019240288A1 (ja) | 2018-06-14 | 2019-12-19 | 味の素株式会社 | 抗体に対する親和性物質、および生体直交性官能基を有する化合物またはその塩 |
| CN112262152A (zh) * | 2018-06-14 | 2021-01-22 | 味之素株式会社 | 具有针对抗体的亲和性物质、切割性部分及反应性基团的化合物或其盐 |
| JPWO2019240287A1 (ja) * | 2018-06-14 | 2021-07-01 | 味の素株式会社 | 抗体に対する親和性物質、切断性部分および反応性基を有する化合物またはその塩 |
| JP7413999B2 (ja) | 2018-06-14 | 2024-01-16 | 味の素株式会社 | 抗体に対する親和性物質、切断性部分および反応性基を有する化合物またはその塩 |
| EP4406975A2 (en) | 2018-06-14 | 2024-07-31 | Ajinomoto Co., Inc. | Compound having affinity substance to antibody and bioorthogonal functional group, or salt thereof |
| WO2022191283A1 (ja) | 2021-03-11 | 2022-09-15 | 味の素株式会社 | 化合物またはその塩、およびそれらにより得られる抗体 |
| EP4368722A4 (en) * | 2021-07-07 | 2025-11-26 | Ajinomoto Kk | METHOD FOR THE SECRETORIAL PROCESSING OF NON-NATURAL AMINO ACID-CONTAINING PROTEIN |
Also Published As
| Publication number | Publication date |
|---|---|
| US11149074B2 (en) | 2021-10-19 |
| EP3453758A4 (en) | 2019-12-04 |
| JPWO2017191817A1 (ja) | 2019-03-07 |
| EP3453758A1 (en) | 2019-03-13 |
| JP7020403B2 (ja) | 2022-02-16 |
| US20190055300A1 (en) | 2019-02-21 |
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