EP1663473A2 - Reseaux de molecules et son procede d'obtention - Google Patents

Reseaux de molecules et son procede d'obtention

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Publication number
EP1663473A2
EP1663473A2 EP04761038A EP04761038A EP1663473A2 EP 1663473 A2 EP1663473 A2 EP 1663473A2 EP 04761038 A EP04761038 A EP 04761038A EP 04761038 A EP04761038 A EP 04761038A EP 1663473 A2 EP1663473 A2 EP 1663473A2
Authority
EP
European Patent Office
Prior art keywords
functionalities
auxiliary structures
molecules
solid surface
bound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04761038A
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German (de)
English (en)
Inventor
Stefan Howorka
Patrick Pammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Upper Austrian Research GmbH
Original Assignee
Upper Austrian Research GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AT14552003A external-priority patent/AT414047B/de
Application filed by Upper Austrian Research GmbH filed Critical Upper Austrian Research GmbH
Publication of EP1663473A2 publication Critical patent/EP1663473A2/fr
Withdrawn legal-status Critical Current

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    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0046—Sequential or parallel reactions, e.g. for the synthesis of polypeptides or polynucleotides; Apparatus and devices for combinatorial chemistry or for making molecular arrays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B01J2219/00277—Apparatus
    • B01J2219/00351—Means for dispensing and evacuation of reagents
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Definitions

  • the present invention relates to arrangements for binding molecules, in particular for use as biochips or for analysis by means of the "single dye tracing" scan or "time delayed integration” method.
  • Genos and proteology pose major challenges for biotechnology, whereby single-molecule microscopy can play an important role.
  • Common methods of genomics and proteomics are based on investigations using DNA or protein arrays, the evaluation of which determines the ensemble properties of many biomolecules (Arbeitman et al., 2002; MacBeath et al., 2000; Pollack et al., 1999; Zhu et al., 2001).
  • Single-molecule microscopy offers a qualitative advantage of fundamental importance, since individual biomolecules can be examined without their relevant properties being distorted or thinned by averaging ensemble observation (Clausen-Schaumann et al., 2000; Mehta et al ., 1999; Nie et al., 1997; Schmidt et al., 1996; Segers-Nolten et al., 2002; Xie et al., 1999).
  • Examples of the properties of individual molecules are, for example, the respective set of mutations in a DNA molecule, or the individual post-translational modification of each individual expressed protein, and its state of association with other proteins.
  • Expression profile a technology that allows many different biomolecules or their structural variants to be examined individually and quickly, for example properties of DNA molecules or type and number of messenger RNA molecules that are expressed in a cell of a certain state or after a certain treatment ( Expression profile); furthermore the detailed profiles of the respective expressed proteins, i.e. Profiles differentiated according to type, number, post-translational modification (phosphorylation, glycosylation, etc.), distribution of the individual proteins in the cell, specific protein-protein associations, and the effect on the activity of the protein.
  • Expression profile furthermore the detailed profiles of the respective expressed proteins, i.e. Profiles differentiated according to type, number, post-translational modification (phosphorylation, glycosylation, etc.), distribution of the individual proteins in the cell, specific protein-protein associations, and the effect on the activity of the protein.
  • the Number of single molecules that can be examined at the same time reach at least a few powers of ten, approximately 10 ⁇ to 10 ⁇ , with a reasonable data acquisition time.
  • single-molecule fluorescence microscopy in particular the “SDT-scan” or “TDI” method, lends itself to this application (Hesse et al., 2002; Schindler, 2000).
  • This method has been a routine technique for several years, both for the detection of individual fixed or diffusing molecules on surfaces (Schmidt et al., 1996) and of individual biomolecules in cells (Schutz et al., 2000; Sonnleitner et al., 1999).
  • the method allows ultrafast microscopy of molecules on surfaces with simultaneous single-molecule sensitivity.
  • the method allows the analysis of all individual fluorescence-labeled molecules on 1 cm in about 5 minutes with a very good signal-to-noise ratio, and thus fulfills one of the requirements: The provision of a sufficiently sensitive and at the same time sufficiently fast detection method.
  • Single-molecule detection methods especially single-molecule fluorescence microscopy, make a significant contribution to the analysis of protein and DNA analytes in the basic scientific field and also serve the further development of biotechnological methods that will be used in the future for diagnostic or therapeutic analysis in medicine should be.
  • DNA hybridization is a widely used technology to examine nucleic acids on a genomic scale and to use them for research, diagnosis and therapy purposes. Due to its high sensitivity, single-molecule fluorescence microscopy offers the possibility of avoiding the amplification of the sample DNA and thus preventing amplification artifacts and falsified statements about the expression levels in expression analyzes.
  • single-molecule microscopy Another application of single-molecule microscopy is the (re) sequencing of, for example, human DNA (Braslavsky et al., 2003; Levene et al., 2003) to obtain medically important variants, such as SNPs, of the genetic information.
  • the analyte DNA must be amplified before the sequencing reaction takes place.
  • the use of single molecule fluorescence microscopy would eliminate the step of DNA amplification, which would result in reduced reagent consumption and the desired cost reduction, and accelerated the sequencing process.
  • the individual molecules to be examined should ideally be resolvable in an optically isolated manner. If, for example, the distance between two DNA strands is less than the optical resolution, the fluorescence signals from the sequencing reaction of both strands overlap and the sequence of the strands can no longer be clearly determined.
  • the DNA molecules to be examined should ideally be positioned individually on a solid substrate. This requirement is not met in many published studies on single-molecule studies. In these studies, the molecules are bound undirected and randomly randomly to a surface, and as a result, molecular groups or clusters also form on the surface that cannot be optically resolved. In order to avoid this overloading of molecules, dilute molecule solutions are used, with the disadvantage that the density of molecules on the surface becomes very low; too low to examine the relevant sections of the human genome for diagnostic indicative variations.
  • both individual DNA strands could be optically resolved and a high density of DNA analytes achieved.
  • individual molecules would be present at defined locations, so that there is no other molecule by a molecule with a radius greater than or equal to the optical resolution.
  • This single molecule array would have the further advantage of knowing the exact position of the analyte on the solid substrate, the distinction between signal and noise is simplified. The distinction of the signal from the background noise is particularly important if the DNA analyte is processed in the course of DNA sequencing with fluorescence-labeled reagents, which are caused by the fluorescence background due to non-specific binding to the surface of the solid substrate.
  • WO 00/06770 A discloses biomolecule arrays which, although they maintain certain distances between the biomolecule spots, only allow an insufficiently low density of spots for many applications. Furthermore, it is also not possible to specifically address the molecules there or to provide several different functionalities. In addition, the arrays disclosed there pose problems with regard to non-specific bindings and there is no reusability of these arrays.
  • the arrays based on S-layers with proteins as spacers have a very high density, but these arrays are unsuitable for optical analysis for several reasons: the distances between the functionalities, that are in the range of 10 n are too small to allow optical resolution; the layers are unstable and cannot be built up reproducibly. Furthermore, no different functionalities, in particular addressable functionalities, can be provided.
  • WO 02/061126 presents an array of biomolecules in which individual molecules are bound to spherical structures which act as spacers between the molecules. This enables the average molecular distance to be set via the optical resolution.
  • the occupation of the spherical The spacer with the biomolecules to be examined is undirected and random, and this either leads to undesired double or multiple occupancies per bead, or to an under-marking leads to an insufficient array density.
  • the optical resolution of two molecules on adjacent spherical structures is only given if the molecules are bound at the center of the structures. Since the exact position of the molecule on the spherical structure is not defined, neighboring molecules can be too close and cannot be optically resolved.
  • Bruckbauer (Bruckbauer et al., 2003) describes an arrangement of individual molecules that are applied to the substrate by depositing a pipette, the settling process being coupled with an optical detector system.
  • the manufacturing process of this method is serial and very slow and therefore not suitable for use on a larger scale.
  • the method assumes that the biomolecule must be fluorescence-labeled, and this limits the choice of the molecules to be arrayed.
  • An array of individual biomolecules or groups of biomolecules is also stamped, i.e. achieved by transferring the molecules from the surface of a nanostructured elastic stamp to the surface of a solid substrate (Renaultt et al., 2003). As with the other inventions mentioned, this approach does not guarantee that only individual molecules are bound at the defined positions.
  • WO 02/18266 describes how scanning tunneling microscopy (STM) can be used to position individual inorganic atoms and molecules on a surface in a precisely positioned manner.
  • the arrays are supposed to be used as storage media with high information density. are set and are therefore of no biotechnological interest.
  • the object of the present invention is therefore to completely or partially avoid the disadvantages of the prior art just described and to provide arrays of biomolecules which have a high density, the individual binding regions of which are sufficiently spaced from neighboring binding regions which are optical Analysis systems can be used, addressable binding sites can have or which can use different functionalities.
  • these arrays should be usable for single-molecule analysis, in particular using the SDT method, and should meet the criteria required for this.
  • Another object of the present invention can also be seen to provide assemblies ( "array") made available, defined the single molecules to carry isolated positions and which can be single-molecule fluorescence microscopy read •.
  • assemblies made available, defined the single molecules to carry isolated positions and which can be single-molecule fluorescence microscopy read •.
  • to such a single-molecule arrays have the above-mentioned requirements for DNA arrays and enable high-throughput analysis of samples.
  • the present invention relates to an arrangement for binding molecules, comprising bondable functionalities which are present as molecularly individual functionalities or in groups of the same functionalities on a solid support, the density of the individual functionalities or groups of functionalities on the solid support of 10 ⁇ to 10 ⁇ 0 individual or grouped binding functionalities per c ⁇ amounts to at least 95%, in particular at least 99%, of the individual or grouped binding functionalities within a chosen radial distance d from an (arbitrary) individual binding functionality or Group of functionalities capable of binding there are no further functionalities capable of binding.
  • functionalities are always to be understood as functionalities which are capable of binding, although it is in principle irrelevant according to the invention whether the groups capable of binding on the surface are covalent bonds with those capable of binding Group on the partner molecule to be bound (from a sample or with a linker) or, for example, only a bond can be realized which is based on electrostatic, ionic and / or hydrophobic interactions. It is also irrelevant whether these binding properties are already “activated” or, for example, only need to be specifically activated in a conventional activation step. Therefore, a functionality according to the present invention can be understood to mean a chemical group that is either chemically reactive or by activation reactive is understood to be any kind of chemical or physical interaction.
  • the devices according to the invention represent a decidedly improved alternative to the conventional microarrays; in particular, densities of 1 ⁇ 10 ° molecules or groups of the same molecules or more can be achieved according to the invention.
  • the minimum distance between molecules or groups of molecules that are supposed to be resolvable individually with fluorescence optical detection is approximately equal to the wavelength of the fluorescent light, ⁇ 0.5 ⁇ m (diffraction limit imaging optical microscopy).
  • this basic limit determines in practice the minimum distance between the molecules or groups of molecules of ⁇ 1 ⁇ m, i.e. there should be no more molecules in an area with a diameter of ⁇ 1 ⁇ m around each molecule or group of molecules.
  • the number of molecules or groups should be as large as possible, i.e. in most cases at least in the percentage range of the preferred maximum areal density of 1 x 10 ⁇ / cm ⁇ , in order to make the fast data acquisition of the SDT-scan method come into play.
  • the present invention avoids the disadvantages of the prior art and describes an arrangement of individual molecules on a solid substrate, the position of the individual molecules being known in advance and the distance, d, between the individual molecules being greater than the optical resolution.
  • the position of the individual molecules can be freely selected and determined, as can the distance between the molecules.
  • densities can thus be aim that are at least 100 times larger than, for example, in WO 00/06770 A;
  • the arrangement according to the invention can be made available as an ordered array (in contrast to the "random arrays" according to WO 00/06770 A and W098 / 39688 A).
  • different specificities of the binding sites can also be provided, and thus multi-component arrays can be provided that are also reusable.
  • the distance d in the arrangement is from 0.1 to 100 ⁇ m, in particular 0.5 to 10 ⁇ m.
  • the arrangement according to the invention preferably additionally has units which are bonded to the solid surface via the bindable functionalities, the units preferably being selected from the group consisting of nucleic acids, in particular RNA and DNA, and also oligopeptides and polypeptides, in particular antibodies, or organic molecules, especially members of a combinatorial library.
  • the density of the individual or grouped binding functionalities on the solid support is preferably from 10 ⁇ to 10 °, in particular from 10 "to 10 °, individual or grouped binding functionalities per c ⁇ .
  • the solid surface is preferably a glass, plastic, membrane, metal or metal oxide surface.
  • the arrangement according to the invention additionally has units which are bonded to the solid surface via the bondable functionalities and to which molecules, preferably not covalently, are bonded.
  • the present invention relates to a method for producing an arrangement for binding single molecules, which is characterized by the following steps:
  • auxiliary structures which carry units, in particular organic groups, nucleic acids or Polypept.ide, which can bind to the bondable functionalities of the solid surface, so that the auxiliary structures are bonded to the solid surface via the units and functionalities,
  • Preferably used as means for (i) inactivating the bindable functionalities and (ii) blocking the units are chemical substances which covalently bind to the bindable functionalities or units and thereby inactivate or block them.
  • Examples are chemical substances with free thiol groups, which can bind to functionalities such as maleimides.
  • the method according to the invention for producing an arrangement for binding molecules can also be implemented by the following steps: providing a solid surface with functionalities and contacting the solid surface with auxiliary structures Wear units with activatable functionalities that can bind to the functionalities of the solid surface, provided that they are activated by external stimuli, or
  • External stimuli such as electromagnetic waves in the form of UV light and changes in temperature, are preferably used to activate the activatable functionalities.
  • auxiliary structures consist of organic or inorganic polymers, metals or metal compounds.
  • auxiliary structures which consist of organic or inorganic polymers, metals or metal compounds.
  • the products from Dynal eg: the Talon product
  • BioMag® beads microparticles with a paramagnetic iron oxide core
  • the Dynabeads® TALON TM are uniform, superparamagnetic polystyrene beads with a diameter of 1 ⁇ m, coupled with highly specific BD TALON TM chemistry (tetradentate metal chelator) which 4 of the 6 coordination posts are occupied by cobalt; the imidazole rings of histidine residues (in a poly-histidine peptide chain, the two remaining coordination sites can occupy, resulting in protein binding).
  • the auxiliary structures preferably have a marking, preferably more than one type of marked auxiliary structure being used.
  • auxiliary structures with a fluorescence marking are used, and preferably auxiliary structures with different fluorescence marking are used.
  • Any auxiliary structure preferably bears only a specific type of unit, such as organic groups, nucleic acids or polypeptides, a population of auxiliary structures with differently occupied units being used.
  • both the specific fluorescence marking of the different auxiliary structures and the specific covering of the auxiliary structures with units before applying the auxiliary structures to the solid surface are known in the method according to the invention.
  • the chemical identity of the units left by the auxiliary structures is preferably known after the auxiliary structures have been detached.
  • the contacting of the solid surface with the auxiliary structures is preferably carried out with the aid of gravity, centrifugal force, magnetic force, electrical attraction, enrichment at two-phase boundary layers or combinations thereof.
  • a glass, plastic, membrane, metal or metal oxide surface is preferably used as the solid surface.
  • NH2 SH, OH, COOH, Cl, Br, I, isothiocyanate, isocyanate, NHS ester, sulfonyl chloride, aldheyd, epoxy, carbonate -, imidoester, anhydride, maleide, acryloyl, aziridine, pyridyl disulfide, diazoalkane, carbonyl diimidazole, carbodiimide, disuccinimidyl carbonate, hydrazine, diazonium, aryl azide, benzophenone -, Di-azirine groups or combinations thereof have proven successful.
  • a spacer molecule can preferably be provided between the functionalities capable of binding and the units to be bound or between the solid surface and functionalities capable of binding.
  • auxiliary structures which have bound units, in particular nucleic acids or polypeptides, via molecular recognition and which carry terminal thiol functionalities which can bind to the solid surface, so that the auxiliary structures are bound to the solid surface,
  • auxiliary structures that carry units, especially organic molecules of a combinatorial library, with activatable functionalities, in particular photoactivatable phenylazides, which can bind to the functionalities, in particular amine functionalities, of the solid surface, provided that they are in particular by UV Light illumination step are activated, the units being bound to the auxiliary structures via chemically cleavable functionalities, in particular disulfide bridges,
  • the invention naturally also relates to arrangements which can be obtained by the method according to the invention.
  • the arrangements according to the invention are used in the context of a fluorescence microscopy examination (especially for single-molecule examinations), in particular the “single dye tracing” (SDT) method.
  • the arrangements according to the invention for binding biomolecules in particular for binding antigens, ligands, proteins, DNA, mRNA, toxins, viruses, bacteria, cells or combinations thereof, can be used and then all methods possible with these arrangements (for example, detections and analysis procedures).
  • the arrangements according to the invention are used for the investigation of cDNA of cells, where fluorescence-labeled cDNAs bind to the arrangement of different oligonucleotides, and the binding can be read out for each bound cDNA type.
  • the arrangements according to the invention are preferably also used for examining the proteins of cells, fluorescent-labeled proteins binding to the arrangement of different antibodies and the binding being able to be read out for each bound protein type.
  • Another special feature of preferred arrangements according to the invention is the realization of the addressability of the binding sites.
  • the position and number of binding sites should be known as precisely and a priori as possible, as well as the type of molecules on each binding site.
  • Such addressability of the binding sites with respect to both position and function represents the key to simple and broad application at the same time.
  • the arrangement according to the invention with, for example, antibodies and oligonucleotides, it is known which protein on which antibody to which Is directed to the site and which oligonucleotide hybridizes with which DNA or messenger RNA sequence at which point on the matrix. Without addressability, no connection can be established between the observers at a binding site and the type of molecule bound. A molecule-specific statement would not be possible, and the central advantage of using single-molecule microscopy on the tasks described would thus be lost.
  • samples of many different biomolecules can be broken down by labeling with only one fluorescent marker, because the fluorescence detection at a certain location means binding to a known capture molecule.
  • the analyte molecules would either have to be individually labeled and measured sequentially, or many different dyes would have to be used for color-specific labeling at the same time, which is either impractical or very quickly reaches practical limits.
  • the addressability not only facilitates access to information, but also the computing time for data acquisition and evaluation is shifted to a reasonable range.
  • the computing time with fast computers and fast algorithms would take a long time, since the necessary search for the molecular positions (maxima of the single-molecule fluorescence intensity) of -10 ⁇ molecules is computationally intensive.
  • MARS matrix of addressable recognition sites The invention of the underlying requirements for the realization of a molecular matrix (hereinafter abbreviated as "MARS matrix of addressable recognition sites”) can be • summarized as follows:
  • binding sites for molecular recognition should preferably be present in combinations on the "MARS" in the following manner:
  • the invention accordingly relates in particular to the production of matrices of organic molecules or biomolecules (for example antibodies, receptors, peptides, oligonucleotides or nucleic acids) which are transferred and bound to a substrate surface via suitable auxiliary structures, in such a way that the transferred biomolecules individually or in Groups of the same molecules are present in isolation, ie they can be observed in isolation using optical single-molecule microscopy.
  • organic molecules or biomolecules for example antibodies, receptors, peptides, oligonucleotides or nucleic acids
  • Auxiliary structures can preferably be used to achieve the tasks set according to the invention (FIG. 1A), in particular balls (3, 11) made of organic or inorganic substances with diameters (18), which depend on the intended use and in the range from ⁇ 0.5 ⁇ m to -100 ⁇ m.
  • Each sphere (3,11) carries "catcher molecules" (4,6) and only one type.
  • FIG. IB outlines the individual steps of the transfer process using a transferred "capture molecule” as an example.
  • the "catcher molecules” e.g. antibodies, oligonucleotides, etc .; symbol Y in FIG.
  • IB are bound to the balls, preferably via molecular recognition by complementary biomolecules (e.g. epitopes for antibodies, complementary oligonucleotides, etc .; symbol X in FIG. IB), which are bound directly or via flexible spacer molecules to the spherical surface.
  • the balls are preferably added to the substrate in the liquid phase and accumulate on the surface thereof. Under suitable conditions, a hexagonally tight packing can be achieved. Their non-specific interaction with the substrate is weak in comparison to the specific binding of the "catcher molecules”.
  • the "catcher molecules” (4, 6) bind (FIG. IB: 5, 7, 12, 13) covalently or via specific noncovalent molecular interaction to the surface of the substrate (1).
  • the binding strength of a "catcher molecule” is sufficient to hold the ball in place at the binding site.
  • the balls are removed from the surface (36) and the “catcher molecules” remain on the substrate at the point of contact with the ball (9, 10, 15, 16).
  • the molecular recognition complexes between the transferred “capture molecules” and the complementary molecules bound to the spheres are dissociated.
  • the bonds of the molecular recognition can be released easily and without damage to the “catcher molecules” without the fixation of the “catcher molecules” being undone by the substrate.
  • Other methods of detachment are the use of tensile forces (when using magnetic balls (Edelstein et al., 2000)) or hydrodynamic shear forces.
  • the "imprints" left by the balls are either individual "catcher molecules” (FIG. 1A: 9,10), when using balls with a correspondingly low population density (3), or groups of M catcher molecules (FIG. 1A: 15,16), when using spheres with a correspondingly high density of "capture molecules” (11).
  • the minimum distance between the binding sites (2) is given by the diameter of the balls (18), reduced by the diameter of the binding area (17).
  • the number of "capture molecules” transferred per "impression” depends on several factors and can be controlled thereby. Two important factors are the areal density of the "catcher molecules” on the sphere and the binding capacity of the substrate compared to the "catcher molecules”. In addition, the number of "catcher molecules” transferred is also influenced by the size of the contact area (FIG. 1A: 17) between ball (11) and substrate (1). A larger contact area results when using substrates which are covered with a compressible polymer layer. When using a coating by means of linear flexible polymer chains, the radius of the contact area (17), r, can be calculated from the sphere diameter (18), d, and the effective polymer length, h, with the relationship r ⁇ ⁇ h * d.
  • Mw 2000 with a maximum stretched length of 15 nm
  • Spheres with a high population density (11), M "capture molecules” per r 2 then allow the transfer of approximately M. "capture molecules”.
  • M can be adjusted in a wide range using established methods for populating spheres with biomolecules via molecular recognition, with densities up to 1/50 nm 2 .
  • the positions of the balls are measured prior to their detachment (FIG. 2:22).
  • the use of the SDT-scan method is also advantageous for this.
  • the position of each sphere can be determined very precisely from its image (24) on the pixel array (23) of the CCD (Charged Coupled Device) camera used in the SDT method, about 40 nm (Hesse et al., 2002).
  • the less precise assignment of individual pixels to each sphere (FIG. 2: 26 and FIG. 3: 26) is sufficient, as a result of which the limiting time of the data evaluation is significantly shortened to approximately the time of the data acquisition.
  • the matrix also contains balls that serve as position references (FIG. 2: 19 and FIG. 3:19).
  • These balls carry reactive functionalities (FIG. 2: 20) in high density and are fixed to the substrate via several covalent or non-covalent bonds (FIG. 2: 21) and can no longer be detached. They are fluorescent and give a significantly larger signal (FIG.2: 25) on the pixel array (FIG.2: 23).
  • the reference balls remain on the substrate and their positions (FIG. 2: REF 1) provide a long-life grid for finding (FIG. 3:27) the positions of the binding sites (FIG.
  • the SDT-scan method makes it possible to find any position on a surface that is only 0.1% covered with randomly distributed reference spheres, with a precision well below one pixel, even after the matrix has been removed from the SDT-scan microscope.
  • Color coding of the spheres is used to achieve the functional addressability (a priori assignment of the type and number of "capture molecules" to the binding sites) (FIG. 4).
  • Color coding of spheres made of inorganic or organic polymers of the size in question is state of the art and is offered in some variants by companies (Bangs, Luminex, Microparticles, micromod, dynal).
  • There are fluorescent molecules of different colors in the spheres whereby the number of molecules of each color can be set to defined graded values. With n different colors and m different concentrations of each fluorophore, in principle m n -1 spheres that can be distinguished in their fluorescence can be produced.
  • a color code (33, 34) is measured for each binding site (FIG. 4: 26) by fluorescence measurement of the bound balls, which indicates which "catcher molecule” is present at the binding site. Due to the extreme sensitivity of the SDT method, spheres can be measured precisely with regard to the gradations of their fluorescence intensity and with regard to their position. In FIG. 4 is outlined for 5 grades 0, 1, 2, 3, and 4 (commercially available up to 10 grades for the same dye) of fluorescence from 4 different dyes. The fluorescence image of the spherical matrix (FIG. 4) is recorded separately for each color. This results in a color code (33) for each ball position (FIG.
  • FIG. 6A shows the steps involved in the production of a MACS using a molecule as an example.
  • the molecules to be transferred are bound to the spheres and are made up of a cleavable functionality (40) (eg a disulfide bridge), an optional molecular part (57, 58) and a terminal functionality.
  • a cleavable functionality eg a disulfide bridge
  • an optional molecular part 57, 58
  • a terminal functionality e.g. a terminal functionality.
  • the spheres attach to the substrate and bind to the surface via the terminal functionalities.
  • the cleavable functionalities (40) are broken down (eg reduction of the disulfide by dithiothreitol); a portion of the split functionality (41, 42) (eg thiol) and the optional molecular parts (60, 61) remain on the substrate (1).
  • MACS molecule matrices can be produced for two different tasks in the way described here:
  • the aim is to have a population of different molecules (57, 58) of balls (3, 11) on the flat substrate to be transferred (59).
  • An example of a specific application is a combinatorial library of organic substances on spheres (Jung, 2000; Nicolaou et al., 2002).
  • a sphere carries only one type of organic substance at a time, and the entirety of the different substances is to be transferred to a flat substrate in order to be able to test their biological activity.
  • the split functionalities (41, 42 in FIG. 6A and FIG. 6B-1; e.g. thiol) can be deactivated (methyl iodide).
  • a chemical matrix with identical, split reactive functionalities (41, 42) (e.g. thiol) is produced on a surface.
  • the chemical functionalities can be modified chemically, for example with antibodies or oligonucleotides.
  • this chemical matrix can be described by MACS (Pi; mi), the number mi of reactive functionalities being present at the position Pi.
  • FIG. 7 sums up some ways in which “matrices of addressable chemical reaction sites” of the last-mentioned type MACS (Pi, mi) (FIG. 6B-2) can be produced and then converted into MARS “matrices of addressable recognition sites”.
  • the functionalities (40) of balls (11, 3) are transferred to the substrate surface with a high or low occupancy density via the transfer step (44, 46).
  • the resulting matrices contain isolated sites with groups of reactive functionalities (41), MACS (Pi, mi) (45) or sites with individual reactive functionalities (42), MACS (Pi, l) (48).
  • Chemical matrix MACS (Pi, mi) (45) can also be converted into MACS (Pi, l) (48) (47) by using smaller ones Balls (38) with very few reactive functionalities (40).
  • This offers the advantage of being able to produce high-purity matrices with individual reactive functionalities (42).
  • This is achieved by the cyclic repetition of the binding of the smaller balls (38) with functionalities (40) (eg orthopyridyl sulfide) to some of the reactive functionalities (41) (eg thiol), which are thereby protected against the subsequent inactivation of the free functionalities on the substrate (1), for example by N-ethyl-maleimide.
  • the same method can also be applied directly to the "MACS (Pi, 1)" (48) matrix (not included in FIG. 7) in order to clean the matrix of defects with more than one reactive functionality.
  • the resulting chemical matrices (45, 48) can be used universally and can be used to produce "MARS” matrices of various types. Some examples are shown.
  • Way (51) the production of multi-functional single-molecule matrices, "MARS (Pi; Fi, 1)" (55), is facilitated by the fact that the loading of the balls, advantageously small balls
  • Path (49) is a way of producing matrices "MARS (Pi; Fi, mi)" (54) with single or groups of capture molecules.
  • Route (49) starts from the matrix MACS (Pi, mi) (45) and is an alternative to the direct route (43) for producing "MARS (Pi; Fi, mi)" matrices without chemical matrices.
  • the arrangement according to the invention is constructed from two components, a surface with nanoscopic islands and an adapter which is based on this island is bound.
  • the first component is a solid substrate with a nanostructured surface (Fig. 16).
  • the nanostructuring is in the form of islands with nanoscopic dimensions (Fig. 16, 2), which are applied to the solid substrate (Fig. 16; 1) and differ from the surrounding, chemically unchanged surface by their different chemical composition.
  • the material from which the islands are composed must be able to interact with the solid surface to which it is applied in such a way that the island remains firmly and permanently attached to the solid surface.
  • the islands must also remain localized after application to the surface and must not change in their extent (apart from slight atomic diffusion and slight thermal effects). The spatial expansion of the islands must therefore remain constant after settling on the surface, especially in the measurement processes during the subsequent application.
  • the island material is also selected depending on the solvent to be used; the material should be inert in the chosen solvent, for example against oxidation.
  • the material from which the nanoscopic islands are made is selected such that the islands are adapter-specific, ie that the adapters bind specifically to the islands, but not to the solid surface or to the substrate between the islands.
  • the size of the islands is adjustable by the process of manufacture and the extent can usefully range from 1 to 100 nm. According to the invention, the size of the islands is preferably “tailored” to the adapters used, so that it can be ensured that an adapter molecule completely covers an island.
  • smaller islands have the disadvantage that their shape or the constancy of their spatial extent is difficult to ensure is that the properties of the respective material can change dramatically in the case of such too small islands. Too large islands (ie oversized adapters) are disadvantageous in terms of their exact localizability in the detection experiment.
  • nanoscopic islands with a spatial extension (diameter on the solid substrate) of 3 to 70 nm, preferably of 5 to 50 nm, in particular of 10 to 30 nm, has been particularly proven.
  • the distance between a functional part of the molecule, in particular a fluorophore, which can be excited by light, and the nanoscopic island is from 0.1 to 100 nm, preferably 1 to 50 nm, in particular 5 to 30 nm.
  • the material from which the nanoscopic islands according to the invention consist is preferably selected from the group consisting of metals, inorganic or organic materials, in particular metal oxides, short-chain organic molecules, organic polymers and silane reagents.
  • metals are above all gold and silver, but also copper, zinc, lead, palladium and platinum.
  • nobler metals are preferred over others because of their inertness with regard to oxidation, in particular with atmospheric oxygen or water (metals which are resistant to oxidation with respect to water and / or atmospheric oxygen).
  • Preferred inorganic materials are metal oxides, in particular copper oxide, tantalum oxide, titanium oxide, and semiconductor structures, in particular quantum dots made of CdSe, ZnSe or InGaAs.
  • Preferred short-chain organic molecules are 16-mercaptohexadecanoic acid and 16-hydroxyhexadecanoic acid hydroxamic acid; preferred organic polymers are poly-L-lysine, poly-L-glutamate or biotin-polyethylene-glycol-poly-L-lysine; preferred silane reagents are mercaptomethyl-dimethylethoxysilane, 3-mercaptopropyl-triethoxysilane, 16-bromo-hexanedecane-trichlorosilane, 3-amino-propyl-triethoxysilane and 3-glycidoxypropyl trimethoxysilane.
  • the materials from which the islands are built are preferably also selected on the basis of their suitability in certain application processes. Materials whose basic suitability in one or more of the application methods (“spotting”) are known in the prior art are therefore in any case considered to be preferred.
  • the second component consists of adapters which bind individual molecules, for example biomolecules, for example individual DNA strands, to the islands.
  • An adapter to be used according to the invention (Fig. 17; 3) has two functional parts, (i) the first part (Fig. 17; 4), which does not interact with the islands but to the areas between the islands, causes the adapters to bind only to the islands and not to the areas between the islands, (ii)
  • the second part (Fig. 17; 5) has a binding capacity, by means of which a certain single molecule, in particular a biomolecule (Fig. 17; 6) is bound to the adapter, and thus to the islands on the surface of the solid substrate.
  • the adapter has a specific binding site for a specific molecule, which then only binds to the adapter, but not to the solid surface or the island material.
  • the adapters can preferably be equipped with a single binding specificity; in other cases, the task can also include the provision of a plurality of different, different or several identical binding sites (e.g. 2, 3 or 4 digits; in any case, always only a certain number determined in advance ) in the adapter molecule.
  • Another feature of the adapters is that the two parts are arranged on different sides of the adapter, so that the adapter binds with one side (FIG.
  • a third feature of the adapters is that their 2-dimensional size projected (along the normal to the solid surface) at least reaches the size of the islands, or can exceed them. This ensures that only one adapter has bound to one biomolecule per island. If the adapters were much smaller than the islands, multiple adapters and biomolecules could bind to a single island, and the single molecule array would no longer be guaranteed, so that these embodiments generally represent only worsened embodiments of the present invention.
  • DPN Dip-pen nanolithography
  • EBL Electron beam lithography
  • the solid surface is a glass, plastic, membrane, metal, or metal oxide surface that is preferably flat, smooth, and impervious (e.g. to the solvent or a sample buffer).
  • the islands consist of metal, metal oxide, organic or inorganic polymers, and groups of organic or inorganic compounds.
  • the adapters are preferably of a metallic, inorganic, organic or biochemical nature.
  • gold or silver cluster or nanogold (or silver) derivatives (Boisset et al., 1994), in particular those with only one functionality, to which a single DNA strand is bound, are used for a metallic adapter.
  • dendrons also called “molecular wedges” are used as organic adapters.
  • the tip of the dendron core consists of a single functionality to which a biomolecule is coupled, while the periphery of the dendron, ie the other end of the dendron, consists of there is a multitude of identical functionalities that bind to the island (Bell et al., 2003).
  • WO97 / 39041 and Zhang describe the non-directional binding of dendrimers to surfaces without the positioning of the dendrons being guided by an ordering principle.
  • proteins are used as biochemical adapters, DNA dendrimers or, preferably. Proteins are suitable for use as adapters for two reasons. Proteins or defined protein multimers have a maximum extension of up to 100 nm and are therefore of a size comparable to that of the nanostructured islands, so that multiple assignment of the islands with several adapters is made more difficult.
  • the use of proteins as adapters is preferred because, if their three-dimensional structure is known, mutagenesis methods can be used to make targeted changes in the protein scaffold so that a single biomolecule is subsequently coupled to the adapter without disrupting the interaction of the adapter with the islands ,
  • the adapters or the individual molecules are preferably bound to the adapters on the islands by covalent coupling, electrostatic interaction, ligand complexes, biomolecular recognition, chemisorption or combinations thereof.
  • the following functionalities are preferably used for the covalent coupling: NH 2 , SH, OH, COOH, Cl, Br, 1, isothiocyanate, isocyanate, NHS ester, sulfonyl chloride, Aldehyde, epoxy, carbonate, imidoester, anhydride, maleimide, acryloyl, aziridine, pyridyl disulfide, diazoalkane, carbonyl diimidazole, carbodiimide, disuccinimidyl carbonate, hydrazine, diazonium, Aryl azide, benzophenone, diazirine groups or combinations thereof.
  • Biotin-streptavidin, antibody-antigen, DNA-DNA interaction, sugar-lectin or combinations thereof are preferably used for biomol
  • the present invention relates to a method for producing the arrangement of individual molecules, which is characterized by the following steps: draws is:
  • the method according to the invention for producing an arrangement of individual molecules can also be achieved by the following steps:
  • nanoscopic islands on the surface of a solid substrate by a surface structuring method in particular with STM, DPN, EBL or ion beam lithography, or micro contact printing, coupling of molecules to adapters in solution, separation of the uncoupled adapters or uncoupled molecules by Cleaning steps, application of the adapters coupled with individual molecules to the solid substrate structured with nanoscopic islands.
  • the production of an arrangement of individual molecules is achieved by the following steps: application of nanoscopic islands, preferably gold dots, to the surface of a solid substrate made of glass by scanning tunneling microscopy, application of adapters, in particular dendrons the islands, in particular the gold dots, a dendron on the periphery carrying non-activated disulfide groups which bind to an island, in particular a gold dot, and the dendron core has a single functionality, in particular an N-hydroxy-sucinimide functionality , which can couple with the amine functionality of a single molecule, in particular a modified DNA oligonucleotide, couple the single molecules to the adapters, in particular by reaction of the amine functionality of the DNA oligonucleotides to the N-hydroxy functionality of the dendrons which have bound to the nanoscopic islands, in particular gold dots, removal of those adapters and individual molecules which have not bound to the nanoscopic islands, in particular by washing.
  • nanoscopic islands preferably gold dots
  • nanoscopic islands in particular gold dots
  • coupling of the individual molecules to adapters in solution in particular by reaction of the amine functionality of the DNA oligonucleotides, to the individual functionality of the dendron core , in particular an N-hydroxy succinimide functionality
  • purification of the adapter-single molecule conjugates in particular of dendron-DNA conjugates
  • removal of the uncoupled single molecules or uncoupled adapters by purification methods in particular gel permeation chromatography
  • the invention also relates to arrangements which can be obtained by the method according to the invention.
  • the arrangement of isolated molecules according to the invention is read out by methods of single-molecule microscopy and single-molecule fluorescence microscopy, in particular using the method according to WO 00/25113 A.
  • the reading of the single-molecule fluorescence signals is not negatively affected by the presence of metallic islands, rather, the frequency of detection of fluorescence photons is surprisingly even increased by the proximity of the specifically bound fluorophore to the nanoscopic metallic islands (Enderlein, 2000; Geddes and Lakowicz, 2002; Geddes et al., 2003a; Geddes et al. , 2003b; Lakowicz, 2001; Lakowicz et al., 2002).
  • the arrangements according to the invention can preferably be used for examining biomolecules, in particular oligonucleotides, DNA, mRNA, cDNA, proteins, antibodies, antigens, ligands, toxins and for their detection and investigation by means of detection methods.
  • the arrangements according to the invention can preferably be used for binding other biomolecules, in particular oligonucleotides, DNA, mRNA, cDNA, proteins, antibodies, antigens, ligands, toxins, viruses, bacteria, cells or combinations thereof, and used for their detection and analysis by means of detection methods become.
  • the nanoscopic islands are covered with adapters after the surface structuring of the substrate.
  • the adapters (Fig. 17: 3) are the link between the nanoscopic islands (Fig. 17: 2) and the target molecules (Fig. 17: 6), which are arranged on the substrate (Fig. 17: 1) be coupled.
  • the adapters have both a functionality (FIG. 17: 5) with which they can bind the target molecules and a group of further functional units (FIG. 17: 4) with which the adapters on the nanostructured Can bind islands (Fig. 17: 2).
  • the chemical nature of the functionalities of the adapters and that of the interaction between adapter and molecule, and between adapter and nanoscopic island can be covalent or noncovalent and is highly specific, i.e. the adapters can only bind to the nanoscopic islands but not to the areas of the substrate between the nanoscopic islands; Furthermore, the molecules can only bind to the adapters but not to the nanoscopic islands or in the areas between the islands.
  • the adapters can be constructed from organic, organic or biochemical polymers 3 ⁇ such as metals.
  • the adapters consist of an organic polymer, for example the wedge-shaped dendrons, which are constructed from dihydroxybenzyl alcohol units or from other backbone units.
  • the coupling of the dendrons to the nanoscopic islands made of gold can be based, for example, on the stable thiol-gold interaction if dendrons with a large number of thiol or disulfide groups are used. Coupling the adapters to the nanoscopic islands can be accomplished by adding a solution of adapters to the substrate, followed by washing steps to remove excess adapters from the substrate that have not bound to the nanoscopic islands.
  • the individual molecules are coupled to the substrate-bound dendrons.
  • the molecules can thus carry a single amine functionality that can bind to the individual functionality of the dendrons using, for example, N-hydroxysuccinimide chemistry. Excess molecules that are not coupled to adapters can be removed by a wide variety of methods known in the art, in particular by washing with suitable cleaning liquids.
  • the adapters are made of an inorganic polymer, such as glass, and have a spherical shape.
  • the spherical adapters can be coupled to the nanoscopic islands by modifying gold islands with thiol-containing reagents such as N- (6- (biotinamidohexyl) -3 '- (2' -pyridyldithio) propionamide (biotin-HPDP)
  • thiol-containing reagents such as N- (6- (biotinamidohexyl) -3 '- (2' -pyridyldithio) propionamide (biotin-HPDP)
  • the streptavidin-coated adapters can be brought into contact with a solution of molecules before or after being anchored to the solid substrate so that individual molecules come to rest on the gold islands.
  • the size of the adapters can be freely selected and is adapted to the diameter of the nanoscopic islands, so that only one adapter can bind per nanoscopic island.
  • Different types of adapters can be used at the same time to produce an arrangement with individual molecules; an arrangement is preferably realized with only one type of adapter.
  • Fig. 1 (A) Schematic representation of the process in which individual or groups of molecules are transferred to a flat substrate by means of spherical auxiliary structures. (B) Schematic representation of the individual steps of the process for transferring biomolecules using a "catcher molecule" as an example.
  • Fig. 3 Schematic representation of the method to uniquely determine the position of fluorescent spheres using an array of pixels.
  • Fig. 4 Schematic representation of the fluorescence images of surface-localized and color-coded beads, which contain different fluorophores in different concentrations.
  • Fig. 5 Schematic representation for the production of a "Matrix of Addressable Recognition Sites", MARS.
  • Fig. 6 Schematic representation of the process for producing a "Matrix of Addressable Chemical Reaction Sites", MACS using spherical auxiliary structures.
  • A Illustration of the individual steps of the process for producing a MACS using a molecule as an example.
  • B Schematic representation of the manufacture of two different types of MACS.
  • FIG. 7 Schematic representation of different ways to convert "Matrices of Addressable Chemical Reaction Sites into” Matrices of Addressable Recognition Sites ".
  • Fig. 8 Applications for MARS matrices: harnessing the high sensitivity.
  • MARS Pieris (Pi; Fi, 1) template of -10 ⁇ binding sites allows many different “capture molecules” (here 100 different antibodies as an example; mixtures of oligonucleotides and antibodies can also be used) and at the same time each "capture molecule” "in many copies (here 1 million), which, with the detection sensitivity of individual fluorescence molecules, results in a dynamic range for detection of 6 orders of magnitude, and simultaneously for the detection of 100 different biomolecules, measurable with SDT-scan in - 5 min.
  • Fig. 9 Applications for MARS matrices: proteomics
  • Fig. 9B Applications for MARS matrices: measurement of the post-translational modification of proteins.
  • fluorescence-labeled antibodies against phosphorylation sites (P) and labeled lectins against sugar residues on the proteins the profile of these modifications can be measured for one or more proteins, and optionally with the previously measured variation of the function (FIG. 9A) in a structure - Functional context.
  • Fig. 9C & D Applications for MARS matrices: measurement of protein associations. This takes advantage of the SDT method's stoichiometric measurements. of co-localized fluorescence molecules allowed. The intensity at the binding sites provides information about homo-association (FIG. 9C) or hetero-association (FIG. 9D). For the latter case, it is shown in the lower part of the picture that the same information can also be obtained or checked and secured independently by using two different dyes.
  • Fig. 10 Applications for MARS matrices: DNS and mRNA analyzes.
  • MARS matrices Applications for MARS matrices: measurement of mRNA profiles.
  • Fig. IOC Applications for MARS matrices: mutations in "repeats".
  • the same method as in Fig. 10B can be applied to the identification of mutations in regions of DNA with repeated sequences ("repeats"), by using two different oligonucleotides: one against the natural sequence and one against the mutated sequence.
  • the the upper half of the picture shows the result for DNA without mutation, the lower with a mutation.
  • Fig. 11 Figure for Example 1: Visualization of individual fluorophores using the SDT scan method
  • Fig. 12 Figure for Example 2: Hexagonal tight packing of balls on a surface.
  • Fig. 13 Figure for example 3: replacement of marker beads.
  • A Marker beads marked with arrows before (A) and after the detachment (B) of uncoupled beads.
  • Fig. 14 Figure for example 4: Impression of groups of fluorescence-labeled molecules which were transferred to a flat surface by means of spheres and covlently bound.
  • Fig. 15 Figure for example 5: Beads arranged on a surface with different fluorescence labeling.
  • Fig. 16 Schematic representation of an arrangement of nanoscopic islands (2) which are applied to a solid substrate (1).
  • the average distance between the nanoscopic islands, d, and the diameter of the nanoscopic islands, h, can be freely selected using the surface structuring method.
  • the arrangement consists of any number of nanoscopic islands.
  • Fig. 17 Schematic representation of an arrangement of individual molecules in side view.
  • a single molecule (6) is bound to an adapter (3) via a functionality (5).
  • the other side of the adapter (3) (4) binds to a nanoscopic island (2) which is bound to the surface of a solid support (1).
  • the mean distance between two nanoscopic islands, the adapters and thus between the individual molecules is given by d.
  • d For reasons of clarity, only two nanoscopic islands are shown with the adapters; the arrangement consists of any number of islands, adapters and molecules.
  • Fig. 18 Figure for example 6. Binding of spherical adapters on nanoscopic gold islands.
  • Solid substrates can preferably be used which have been provided with a regular grid consisting of nanoscopic islands by a surface structuring method (FIG. 16).
  • the nanoscopic islands (FIG. 16: 2) preferably consist of metal such as gold or silver and, due to the direct deposition of the metal, for example with STM, at regular intervals on the solid substrate (FIG. 16: 1) preferably become an electrically conductive substrate such as indium -Tin oxide glass applied.
  • the nanoscopic islands made of metal are deposited on the substrate as part of an electro-beam lithographic process.
  • the diameter of the nanoscopic islands, h depends on the specific application and is preferably in the range from 5 to 50 nm (FIG. 16).
  • the vertical height of the nanoscopic islands is dependent on the type of surface structuring method and can be 1-5 nm for STM and 3 - 5 nm for EBL.
  • the nanoscopic islands are spatially separated from one another and the mean distance between two islands, d, is freely selectable by the surface structuring method and lies above the diffraction limit of optical microscopy.
  • PROCESS 8 Transfer of individual capture molecules
  • Capture molecules (groups of 4) attached to the substrate before the ball is detached
  • Capture molecules (groups of 6) fixed to the substrate before the ball is detached
  • Fluorescence intensity of a defined sphere for transmission within a wavelength range deviating from 29.30 and 31.
  • MARS Pi, Fi, mi
  • MACS Pi, mi
  • MARS Pi, Fi, l
  • MACS Pi, mi
  • MACS Pi, l
  • PROCESS Transfer of molecules individually and / or in groups
  • Cy3 fluorophores were immobilized on a glass plate and visualized with an SDT scan.
  • Cy3 was first coupled to polyethylene glycol diamine and this conjugate was covalently bound to an epoxy surface via the remaining terminal amine group of the PEG.
  • DMF hydrochloric acid dimethylformamide
  • the reaction was started by adding 100 ul of a 5% disopropylethylamine (DIEA) / DMF solution; The course of the reaction and the end of the reaction were monitored by means of thin layer chromatography (TLC). Purification was by gel filtration and ion exchange chromatography, and the purity of the fractions was checked by TLC.
  • DIEA disopropylethylamine
  • coverslips Esco, microscope cover glass, 24 x 50 mm; Erie Scientific, Portsmouth, NH
  • GPS glycidoxypropyltrimethoxysilane
  • the quality of the coating was confirmed with contact angle measurements (Dataphysics OCA 20).
  • Beads with a coating of polyethylene glycol (PEG) were used to produce a hexagonally tight packing of balls on one surface.
  • IM 2- (N-morpholino) ethanesulfonic acid (MES) buffer with a final concentration of 1% by mass and mixed with 1 ml of a solution of 0.1M
  • FIG. 12 shows a 110 ⁇ m by 60 ⁇ m section of a transmitted light image of pegylated latex balls arranged in hexagonal close packing on pegylated glass plates, taken with the nano-reader.
  • marker beads a mixture of non-fluorescent beads and covalently coupling, fluorescent marker beads was applied to a glass substrate.
  • the marker beads bound covalently and remained on the surface after washing, while uncoupled beads are detached from the surface.
  • fluorescence-labeled silicate beads (sicastar ® -redF from Micromod, with a carboxyl surface, diameter of 2 ⁇ m) were modified with PEG-diamine (Mw 3400, Shearwater Polymers) via EDC activation.
  • the resulting carboxylate function was in 25 ml DMF with 13 mM N, N, N ', N' -tetramethyl-O- (N-succinimidyl) uronium tetrafluoroborate (TSTU) and 6.9 mM NHS with the addition of 20 ⁇ l triethylamine activated.
  • the washing was carried out using a DMF / isopropanol gradient, followed by drying in a stream of nitrogen.
  • 13 A shows a transmitted light image of the attached beads.
  • the marker beads coupled with the amine minus to the NHS-activated glass surface, so that the marker beads remained on the glass plate after a washing step while non-coupling beads were detached.
  • 13B shows a Cy3 fluorescence image of the adhering makerbeads after the detachment of the non-coupling beads.
  • the plate area shown is the same as that in Fig. 13 A.
  • Fluorescence-labeled molecules were transferred from spheres to a flat surface in a controlled manner.
  • beads were coated with amine-PEG-Cy3 and applied to a glass plate with a PEG-NHS coating.
  • amine-PEG-Cy3 was transferred to the glass substrate and covalently coupled, so that fluorescence-marked impressions remained after the spheres had been washed off.
  • FIG. 14 A shows an approximately 100 ⁇ m by 50 ⁇ m section with a marker bead of high fluorescence intensity and approx. 100 spikes of lower intensity.
  • FIG. 14B shows a partial section of FIG. 14A with impressions of different fluorescence intensities.
  • a fluorescence microscope with a mercury vapor lamp (Zeiss, fluo are HBO 100) and an objective (Zeiss, Axiovert PNF 40x / l, 3 oil) was used to record the fluorescence of the adsorbed beads.
  • An image section was taken with three filter sets: DAPI excitation filter: D365 / 10x, dichroic beam splitter: 380DCLP, emission filter: D460 / 50m.
  • dichroic beam splitter Q505LP— emission filter: HQ535 / 50m.
  • dichroic beam splitter Q565LP— emission filter: HQ610 / 75m.
  • Cy5 excitation filter HQ620 / 60x
  • dichroic beam splitter Q660LP— emission filter: HQ700 / 75m.
  • the individual images were contrasted in color depending on the emitted wavelengths and superimposed using the V ++ software (FIG. 15).
  • the blue spheres correspond to the signals of Sicastar blue, the green spheres to Sicastar red, the black spheres to Sicastar green.
  • fluorescence-labeled nanoparticles were coupled to gold islands on a solid substrate via molecular recognition (streptavidin-biotin).
  • Yellow fluorescent beads Em / Ext: 505/515 nm
  • neutravidin-coated surface were used as nanoparticles.
  • gold island with a diameter of 50 nm was deposited on a silicon substrate by means of electro beam lithography.
  • the surface of the gold islands was subsequently modified with N- (6- (biotinamidohexyl) -3 '- (2' -pyridyldithio) -propiona ide (bio-tin-HDPD) (Pierce); neutravidin was attached to the biotinylated gold islands -coated nanoparticles.
  • neutravidin was attached to the biotinylated gold islands -coated nanoparticles.
  • a suspension of 3.6 x 10 9 particles / ml in PBS was applied to the modified substrate and incubated for 30 min. Excess beads were removed by washing several times and specifically bound beads were washed with a fluorescence read out microscope.
  • the reading is carried out using a fluorescence microscope with a mercury vapor lamp (Zeiss, fluo are HBO 100) and an objective (Zeiss, Axiovert PNF 100x / l, 4 oil).
  • the following filter was used.
  • FITC excitation filter HQ480 / 40x
  • dichroic beam splitter Q505LP emission filter: HQ535 / 50m.

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Abstract

L'invention concerne des dispositifs servant à la liaison de molécules, comprenant des fonctionnalités à pouvoir de liaison, se présentant sous forme de fonctionnalités individuelles moléculaires ou en groupes de mêmes fonctionnalités sur un support solide, caractérisés en ce que la densité des fonctionnalités individuelles ou des groupes de fonctionnalités sur le support solide est de 104 à 1010 fonctionnalités individuelles ou groupées, par cm2, et en ce qu'il ne se trouve aucune autre fonctionnalité à pouvoir de liaison pour au moins 95 %, en particulier pour au moins 99 % des fonctionnalités individuelles ou groupées, à l'intérieur d'une distance sélectionnée d d'une fonctionnalité à pouvoir de liaison, individuelle (quelconque) ou de groupes de fonctionnalités.
EP04761038A 2003-09-16 2004-09-16 Reseaux de molecules et son procede d'obtention Withdrawn EP1663473A2 (fr)

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AT14552003A AT414047B (de) 2003-09-16 2003-09-16 Anordnung zur bindung von molekülen
AT0038904A AT501110A1 (de) 2003-09-16 2004-03-05 Arrays zur bindung von molekülen
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