WO2010020143A1 - 提高植物和微生物抗逆性的基因、多肽、载体及其应用 - Google Patents
提高植物和微生物抗逆性的基因、多肽、载体及其应用 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/415—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from plants
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- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8242—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits
- C12N15/8243—Phenotypically and genetically modified plants via recombinant DNA technology with non-agronomic quality (output) traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine, caffeine
- C12N15/8251—Amino acid content, e.g. synthetic storage proteins, altering amino acid biosynthesis
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- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- 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
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8273—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for drought, cold, salt resistance
Definitions
- the invention belongs to the field of molecular biology, and particularly relates to a novel gene, a polypeptide encoded by the gene, a recombinant vector containing the gene and the use thereof for improving plant and microorganism resistance.
- Saline-alkali soil affects the growth of vegetation, which reduces or eliminates crops, and indirectly causes deterioration of the ecological environment, and can corrode and damage engineering facilities, resulting in losses of 2.511 billion yuan per year. Therefore, how to reduce the harm of soil salinization to crops and make full use of limited land resources have become one of the important issues to be solved urgently in agricultural development. In addition to the use of traditional physical, chemical, biological and other measures for comprehensive management, Using the latest molecular biology methods to improve crop tolerance through genetic engineering will be one of the most cost-effective methods. Saline-alkali soil is a soil containing too much salt such as NaCl, Na 2 S0 4 , Na 2 C0 3 and NaHC0 3 .
- the phytotoxicity of saline-alkaline soils mainly includes salt stress and high pH stress and the combined toxicity of these two factors.
- the main damage caused by saline-alkali stress in the following three aspects: First, the massive accumulation of metal ions (mainly Na) in the cytoplasm, it will destroy the intracellular ion balance and inhibit the physiological and biochemical metabolism process in the cell, making the plant photosynthesis The ability to function declines and eventually die due to carbon starvation.
- the saline-alkali soil is a hypertonic environment that prevents plant roots from absorbing water, thereby causing plants to die due to "drought”.
- Third, the pH of the saline-alkali soil is high.
- plants affected by salt and alkali should reduce the accumulation of ions in the cytoplasm on the one hand, and produce special products such as proteins, amino acids, sugars, etc. through the accumulation process to enhance the osmotic pressure of cells and prevent the cells from losing water. , stabilize the structure of plasma membranes and enzymes.
- the pH in the environment is usually expressed as the negative logarithm of the hydrogen ion concentration, pH.
- the pH value in the environment has a great influence on the life activities of microorganisms.
- the main effects are: changes in the surface of the microorganisms due to changes in pH, which in turn affect the absorption of nutrients by microorganisms; PH has a direct impact on microbial cells, It can affect the ionization of organic compounds in the medium, which has an indirect effect on microorganisms, because most non-ionic compounds are more likely to penetrate into cells than ionic compounds; enzymes can only exert maximum activity at the optimum pH, not suitable
- the pH value reduces the activity of the enzyme, which in turn affects the biochemical processes within the microbial cells; too high or too low pH reduces the resistance of the microorganism to high temperatures.
- Plant drought resistance research involves many fields such as plant morphology, physiology, biochemistry and molecular biology. Changes in roots and leaf structure of plants under drought conditions, relationship between abscisic acid (ABA) and stomatal closure, osmotic adjustment substances such as mannitol, proline, betaine, trehalose, fructan, inositol, polyamines, etc.
- ABA abscisic acid
- osmotic adjustment substances such as mannitol, proline, betaine, trehalose, fructan, inositol, polyamines, etc.
- the relationship between molecular compounds and plant drought resistance, aquaporin, active oxygen scavenging and the effects of late abundance proteins on plant drought resistance have been the focus of attention.
- osmotic adjustment is the main drought-tolerant mechanism of plants, in recent years, people have used plant genetic engineering methods to increase the synthesis of proline and betaine in target plants, and have achieved in the cultivation of drought-tolerant transgenic plants based on osmotic adjustment. Gratifying progress.
- Proline is a very water-soluble amino acid. It has a dipolar polarity such that its hydrophobic end is linked to the protein. The hydrophilic end binds to water molecules, which allows the protein to bind more water molecules through proline, thus increasing the solubility of the protein and allowing more soluble proteins to be added to the osmotic adjustment. At the same time, an increase in the bound water content can also avoid or reduce protein denaturation caused by cell dehydration. Therefore, increasing the synthesis ability of proline can improve the drought resistance of plants, and there have been some successful reports in this regard.
- a further object of the invention is to provide a method of transgenic a plant or a bacterium and a method of detecting whether the gene is transferred into a host.
- the technical solution of the present invention is as follows:
- the gene of the present invention has the nucleotide sequence shown by SEQ ID NO: 1 in the Sequence Listing.
- the gene of the present invention has a derivative sequence obtained by substituting, deleting or adding one or several nucleotides in the nucleotide sequence shown in SEQ ID NO: 1, and the derivative sequence is the sequence of SEQ ID NO: 1.
- the above functions are to improve the stress resistance of plants or microorganisms.
- the above-mentioned stress resistance is at least one of drought resistance, acid and alkali resistance, salt alkali resistance, and heat resistance. Further, the above gene has the nucleotide sequence shown by SEQ ID NO: 5 in the Sequence Listing.
- polypeptide of the present invention (1) the amino acid sequence is shown in SEQ ID NO: 2 in the sequence listing;
- the above polypeptide has a function of improving the stress resistance of a plant or a microorganism.
- the stress resistance is at least one of drought resistance, acid and alkali resistance, salt alkali resistance or heat resistance.
- the invention provides a gene encoding the above polypeptide. Monoclonal antibodies directed against the above polypeptides are also provided. The invention also provides the use of the above genes for improving the resistance of plants and microorganisms.
- the stress resistance is at least one of drought resistance, acid and alkali resistance, salt alkali resistance or heat resistance.
- the polypeptides of the invention can also be used to increase plant and microbial resistance.
- the present invention also provides a recombinant vector comprising the above gene. Further, the above recombinant vector can express the gene of the present invention. Further, the above recombinant vector is a recombinant plasmid.
- the present invention also provides a host cell comprising the above recombinant vector, and a transgenic plant or transgenic microorganism comprising the above recombinant vector.
- the present invention provides a method for transgenic plants, the steps of which are as follows:
- step (1) (2) transferring the recombinant expression vector in step (1) into a plant cell;
- the transformed cells are obtained by screening, and then the transformed cells are regenerated to form transgenic plants and their progeny, the progeny including plant seeds and plant tissues.
- the present invention also provides a method for transgenic microorganisms, and the steps are as follows:
- plants or microorganisms having improved stress resistance can be prepared.
- the present invention also provides a method for detecting whether a sample contains the above-mentioned gene, and the method uses the probe prepared by the target gene to be detected to hybridize with the sample, and then detects the sample and probes. Whether the needle is bound, if the sample binds to the probe, the sample contains the sequence of the gene of SEQ ID NO: 1; the sample is the product of PCR amplification of the genome of the tested plant.
- the PCR amplification primer corresponds to the two sides or the middle of the nucleotide sequence of the above gene, and the primer has a length of 15 to 50 nucleotides.
- the probe has 8 to 100 contiguous nucleotides in the nucleotide sequence of the target gene.
- the above probe has 15 to 50 contiguous nucleotides in the nucleotide sequence of the target gene.
- the beneficial effects of the present invention are as follows:
- the present invention provides the use of the TT1 gene for improving the drought resistance of plants, and in the examples of the present invention, the plants which have been transferred into the TT1 gene and overexpressed are also germinated in arid environment.
- the rate has been significantly improved, and the proline content in the plants after growth has also increased, and the growth of the seedlings has also proved that the TT1 gene can effectively improve the drought resistance of plants.
- the method for cultivating drought-tolerant plants of the invention is also simple and effective, and provides a new effective choice for improving salt and alkali resistance of plants, and has a good application prospect.
- Figure 1 is a graph showing the growth status of Escherichia coli containing the recombinant plasmid of SEQ ID NO: 1 and Escherichia coli containing PET28 (£ coli pET28) at 42 °C.
- Figure 1-A Growth state diagram of co7 pET28 strain at 42 °C
- Figure 1-B Growth state diagram of E. coli pET28 strain containing SEQ ID NO: 1 recombinant plasmid at 42 °C
- Figure 1-C A graph of the growth state of the two strains on the same culture plate at 42 ⁇ .
- Figure 2 is a graph comparing the growth curves of Escherichia coli containing SEQ ID NO: 1 and E. coli containing pET28 (coli PET28) under 44 ⁇ growth conditions.
- the curve indicated by the rectangle symbol is the growth curve of the ⁇ coli pET28 (abbreviated as Zn_PET28) strain containing the recombinant plasmid of SEQ ID NO: 1 at 44 ° C, indicating that the ⁇ : CO ' pET28 strain containing the recombinant plasmid of SEQ ID NO: 1
- the growth was normal at 44 °C;
- the curve shown by the triangle symbol is the growth curve of the £ coli pET28 (abbreviated as PET28) strain at 44 °C, indicating that the coli pET28 strain could not grow at 44 °C.
- Figure 3 is a graph showing the results of PCR detection of SEQ ID NO: 1 overexpressing Brassica napus transgenic lines and SEQ ID NO: 1 inhibiting expression of Brassica napus transgenic lines.
- Figure 3-A SEQ ID NO: 1 Overexpression of Brassica Oil
- M marker, 1, 2, 3, 4: SEQ ID NO: 1 overexpressing the transgenic lines of Brassica napus L.
- Figure 3-B Inhibition of SEQ ID NO: 1
- the size of the target band detected was consistent with the expected size of SEQ ID NO: 1, approximately 860 bp.
- Figure 4 is a graph showing the high temperature tolerance of overexpression of Brassica napus transgenic lines and SEQ ID NO: 1 inhibition expression of Brassica napus transgenic lines and Brassica napus L. SEQ ID NO: 1.
- transgenic lines (Zn-DN) with a large delay;
- Figure 4-C When the temperature was increased to 34 °C After 5 days of growth, the growth status of transgenic Brassica napus L. and Brassica napus L., as shown in the figure, SEQ ID NO: 1 Overexpression of Brassica napus L. transgenic lines (Zn-OE) Normal growth, Brassica napus L. (WT) Death, SEQ ID NO: 1 inhibits the expression of Brassica napus L. transgenic lines (Zn-DN) death.
- Fig. 5 is a graph showing the comparison of the high temperature tolerance of transgenic Brassica napus L. and Brassica napus L. with overexpression and inhibition of expression of the nucleotide sequence of SEQ ID NO: 1 after treatment for 3-5 days at 34 °C.
- Figure 5-A Growth state diagram of three plants after treatment at 34 °C for 3 days. As shown, the nucleotide sequence of SEQ ID NO: 1 overexpresses transgenic Brassica napus (Zn-OE). Normal growth, cabbage type The growth of Brassica napus L. (WT) was delayed, and the leaves of the plant showed yellow and curly characteristics. The nucleotide sequence of SEQ ID NO: 1 inhibited the expression of transgenic Brassica napus L.
- Figure 6 is a comparative analysis diagram showing the difference in expression of the nucleotide sequence of SEQ ID NO: 1 between the transgenic Brassica napus L. and Brassica napus L. at the transcriptional level of SEQ ID NO: 1 overexpression and inhibition of expression.
- the SEQ ID NO: 1 nucleotide sequence is overexpressed in Brassica napus L. (Zn-OE), the expression of SEQ ID NO: 1 gene is increased, which is 2.5 times of Brassica napus L.; : 1
- the nucleotide sequence inhibits the expression of Brassica napus L. (Zn-DN), and the expression of SEQ ID NO: 1 gene is reduced, only half of wild-type Brassica napus L. (WT).
- Figure 7 is a recombinant plasmid pGEX_2T (GTK_Zn) containing the nucleotide sequence of SEQ ID NO: 1 at E. coli A graph of induced expression results.
- GTK empty vector pGEX-2T
- Marker 3-7 GTK-Zn (protein recombinant plasmid carrying the nucleotide sequence of SEQ ID NO: 1) Expression in E. coli; 3, 4: IPTG induction for two hours, 5, 6: IPTG induction for three hours, 7: IPTG induction for four hours; black arrow indicates that the expressed protein is 58KD.
- the PGEX-2T recombinant plasmid (GTK-Zn) containing the sequence of SEQ ID NO: 1 induced the expression of a protein band (58 KD) consistent with expectations in E. coli.
- Figure 8 is a graph showing the growth status of Escherichia coli and PET28-containing Escherichia coli containing the recombinant plasmid having the nucleotide sequence derived from SEQ ID NO: 1 and the nucleotide sequence derived therefrom (the sequence shown in SEQ ID NO: 4) at 42 ° C, The substituted or deleted derivative nucleotide sequence of SEQ ID NO: 1 also increases the tolerance of the bacteria to high temperatures.
- Figure 8-A Growth state of Escherichia coli containing pET28 at 42 °C
- Figure 8-B Growth state of Escherichia coli containing the recombinant plasmid of SEQ ID NO: 4 at 42 °C.
- Figure 9 is a graph showing the results of determination of proline (Pro) content in the TT1 gene transfer rapeseed after drought stress.
- 0E (1), 0E (2), 0E (3) are three TT1 genes overexpressing transgenic Brassica napus L.
- WT is wild type Brassica napus L.
- ordinate is proline content, unit is g/g .
- Figure 10 is a photograph of the day when the watering was stopped, with the wild type on the left and the transgenic type on the right.
- Figure 11 is a photograph of the wild type after stopping watering for 5 days, and the right is a transgenic type.
- Figure 13 is a diagram showing whether the target gene has been transferred to Arabidopsis thaliana by agarose electrophoresis, 1 to 12 are transgenic Arabidopsis genomic DNA, and 13 are overexpressing recombinant plasmid DNA containing SEQ ID NO: 1.
- Figure 14 is a graph showing the effect of different concentrations (mmol/DNaCl on the germination rate of non-transgenic TT1 Arabidopsis seeds).
- Figure 15 is a graph showing the effect of different concentrations (mmol/DNaCl on the germination rate of Arabidopsis thaliana overexpressing TT1 gene.
- Figure 16 is a plot of proline content (P g/g) for different treatment groups.
- RLD is wild type
- 0Ea 0Eb, 0Ec, and OEd are Arabidopsis lines overexpressing the TT1 gene
- the ordinate is the proline content ( ⁇ g/g).
- Figure 17 is a color diagram of the proline red toluene solution of the different treatment groups in the cuvette.
- RLD is wild type
- 0Ea, 0Eb, 0Ec, and OEd are overexpressing TT1 gene Arabidopsis lines.
- Figure 19 is a graph showing the growth of the TT1 gene (T) and non-transgenic Escherichia coli (C) after 14 h at 37 °C with pH values of 4.0, 5.5, 7.0, 8.5, and 10.0, respectively.
- the gene of the present invention has a basic nucleotide sequence as shown in SEQ ID NO: 1 in the Sequence Listing, which is derived from the vegetable rapeseed of the Brassicaceae (also known as Bruciferae). Brassica napus ), using the atp6 gene in Brassica napus as a bait protein, according to the yeast two-hybrid method, one EST sequence in rapeseed was screened, and according to the selected sequence, the SEQ ID in the sequence listing was obtained by 5 ' RACE method. NO: The nucleotide sequence shown by 1. Then, a pair of PCR primers were designed based on the nucleotide sequence shown in SEQ ID NO: 1, and the nucleotide sequence shown in SEQ ID NO: 1 was amplified from canola cDNA.
- the recombinant vector of the present invention is obtained by inserting the TT1 gene into a vector which can be selected from various vectors known in the art, particularly eukaryotic expression vectors (e.g., pBI 121 or pCAMBIA2301).
- eukaryotic expression vectors e.g., pBI 121 or pCAMBIA2301.
- the present invention uses the above recombinant vector to transform a host cell or a host microorganism, and these hosts include a prokaryotic host and a eukaryotic host.
- Commonly used eukaryotic hosts include yeast and other plant cells, and the commonly used prokaryotic host is Escherichia coli and the like.
- polypeptide for improving the heat resistance of plants and microorganisms of the present invention wherein the amino acid sequence is represented by SEQ ID NO: 2 in the sequence listing, or the amino acid sequence of SEQ ID NO: 2 is substituted, deleted or added with one or several amino acids.
- the resulting derivative sequence, and the derived sequence functions in the same manner as the sequence of SEQ ID NO: 2.
- the recombinant plasmid in step (1) is transferred to Agrobacterium, and the recombinant plasmid-containing Agrobacterium is co-cultured with a eukaryotic host cell, and dark culture is carried out under conditions of 22-28 Torr. After the day, transformed cells containing the nucleotide shown in SEQ ID NO: 1 were obtained by screening (e.g., antibiotic screening), and the transgenic plants and their progeny were regenerated.
- SEQ ID NO: 1 refers to a nucleotide sequence encoding a polypeptide having SEQ ID NO: 1 protein activity and a degenerate sequence thereof.
- the degenerate sequence refers to a sequence produced by the substitution of one or more codons in the sequence by degenerate codons encoding the same amino acid. Due to the degeneracy of the codon, a degenerate sequence having a homology of less than about 89% to SEQ ID NO: 1 can also encode the sequence set forth in SEQ ID NO: 1.
- the term also encompasses nucleotide sequences that hybridize to the nucleotide sequence of SEQ ID NO: 1 under moderately stringent conditions, more preferably under highly stringent conditions.
- the term also includes nucleotide sequences that are at least 80%, more preferably at least 90%, and optimally at least 95% homologous to the nucleotide sequence of SEQ ID NO: 1.
- the same function in the present invention means to increase the drought resistance of plants. Sex.
- the term also encompasses variant forms of the open reading frame sequence of SEQ ID NO: 1 which encodes a protein having the same function as the native SEQ ID NO: 1.
- variants include, but are not limited to, a number of nucleotide deletions (usually 1-90, preferably 1-60, more preferably 1-20, optimally 1-10) , inserts and/or substitutions, and adding a few at 5' and/or 3' ends (usually within 60, preferably within 30, more preferably within 10, optimally within 5) ) nucleotides.
- the SEQ ID NO: 2 protein or polypeptide refers to a protein active polypeptide encoded by SEQ ID NO: 1.
- These variants include, but are not limited to, a number (usually 1-50, preferably 1-30, more preferably 1-20, optimally 1-10) amino acid deletions, insertions and/or Substituting, and adding one or several (usually 20 or less, preferably 10 or less, more preferably 5 or less) amino acids at the C-terminus and/or the N-terminus.
- the function of the protein is usually not altered.
- the addition of one or more amino acids at the C-terminus and/or N-terminus will generally not alter the function of the protein.
- the term also encompasses active fragments and active derivatives of the SEQ ID NO: 2 protein.
- Variant forms of the SEQ ID NO: 2 polypeptide of the invention include: homologous sequences, conservative variants, allelic variants, natural mutants, induced mutants, and SEQ ID NO: under high or low stringency conditions: A protein encoded by the hybridized DNA, and a polypeptide or protein obtained by using the antiserum of the polypeptide of SEQ ID NO: 2.
- the invention also provides other polypeptides, such as fusion proteins comprising the polypeptide of SEQ ID NO: 2 or a fragment thereof.
- the present invention also encompasses soluble fragments of the polypeptide of SEQ ID NO: 2.
- the fragment may have at least about 10 contiguous amino acids of the polypeptide sequence of SEQ ID NO: 2, typically at least about 30 contiguous amino acids, preferably at least about 50 contiguous amino acids, more preferably at least about 80 contiguous amino acids, optimally At least about 100 consecutive amino acids.
- the "conservative variant polypeptide of SEQ ID NO: 2” means that up to 10, preferably up to 8, more preferably up to 5 amino acids are compared to the amino acid sequence of SEQ ID NO: 2. A similar or similar amino acid is replaced to form a polypeptide.
- conservative variant polypeptides are preferably produced by substitution according to Table 1.
- the invention also encompasses analogs of the protein or polypeptide of SEQ ID NO: 2.
- the difference between these analogs and the native SEQ ID NO: 2 polypeptide may be a difference in amino acid sequence, a difference in the modification form which does not affect the sequence, or a combination thereof.
- These polypeptides include natural or induced genetic variants. Induced variants can be obtained by a variety of techniques, such as random mutagenesis by irradiation or exposure to a mutagen, or by site-directed mutagenesis or other techniques known to molecular biology.
- Analogs also include analogs having residues other than the native L-amino acid (e.g., D-amino acids), as well as analogs having non-naturally occurring or synthetic amino acids (e.g., beta, y-amino acids). It is to be understood that the polypeptide of the present invention is not limited to the representative polypeptides exemplified above.
- Modifications include: chemically derived forms of the polypeptide, such as acetylation or carboxylation, in vivo or in vitro. Modifications also include glycosylation, such as those produced by glycosylation modifications in the synthesis and processing of polypeptides or in further processing steps. Such modification can be accomplished by exposing the polypeptide to an enzyme that performs glycosylation, such as a mammalian glycosylation enzyme or a deglycosylation enzyme. Modified forms also include sequences having phosphorylated amino acid residues such as phosphotyrosine, phosphoserine, phosphothreonine. Also included are polypeptides modified to increase their resistance to proteolytic properties or to optimize solubility properties.
- the expression of the SEQ ID NO: 1 gene product can also be analyzed by Northern blotting techniques, i.e., the presence or absence and amount of the RNA transcript of SEQ ID NO: 1 in the cell is analyzed.
- Northern blot analysis of SEQ ID NO: 1 and Western blot analysis of SEQ ID NO: 2 specific antibodies can be used in combination to confirm expression of SEQ ID NO: 1 in a biological sample.
- the homologous gene or homologous protein of SEQ ID NO: 1 can be screened based on the homology of the nucleic acid or the homology of the expressed protein.
- the recombinant sequence can be used to obtain the relevant sequences in large quantities. This is usually done by cloning it into a vector, transferring it to a cell, and then isolating the relevant sequence from the proliferated host cell by conventional methods.
- Example 1 Cloning and acquisition of a novel gene of the present invention
- Upstream primer (SEQ ID NO: 7): 5 ' - ATGTCGGATCATTTGAGTTTATG- 3 '
- Downstream primer (SEQ ID NO: 8): 5, -TCAGACTGGTGTTGGGTTGGATAT-3 '.
- the nucleotide sequence shown in SEQ ID NO: 1 was then amplified from the Brassica napus L. by PCR.
- the PCR procedure is as follows:
- Example 2 Construction of Escherichia coli expressing SEQ ID NO:
- the PCR procedure is as follows:
- the host strain E. coli pET28 was separately applied to LB solid medium at a dose of 1%, and cultured overnight at 42 ⁇ . The experiment showed that the host strain cW pET28 could not grow after treatment at 42 °C (see Fig. 1-A); the coli pET28 strain containing the recombinant plasmid of SEQ ID NO: 1 grew well at 42 °C (see Fig. 1-B).
- the growth of the co ' pET28 strain containing the recombinant plasmid of SEQ ID NO: 1 and the host strain E. cWi pET28 at 44 ° C was compared according to the above experimental procedure.
- the experiment showed that the growth curve of the E coli pET28 strain containing the recombinant plasmid of SEQ ID NO: 1 showed a logarithmic increase (see Figure 2, Zn-pET28), indicating normal growth at 44 °C; host strain E. coli pET28 It cannot grow at a temperature of 44 ° C (see Figure 2, pET28).
- Upstream primer (SEQ ID NO: 11): 5, -CGCGGATCCATGTCGGATCATTTGAGTTTATG-3 '; downstream primer (SEQ ID NO: 12): 5, -CCGGAGCTCTCAGACTGGTGTTGGGTTGGATAT-3 '.
- the PCR product was purified (see information published by Qiagen), then digested with BamHl and Sacl, recovered by gel, ligated to the vector PBI 121 (ligation sites: BamHl and Sac1), and the excess contained in SEQ ID NO: 1 was obtained.
- Expression of the recombinant plasmid The overexpressed recombinant plasmid containing SEQ ID NO: 1 was transferred into Agrobacterium, and the Brassica napus L. was transformed by hypocotyl infiltration.
- Upstream primer (SEQ ID NO: 13): 5 '-CCGGAGCTCATGTCGGATCATTTGAGTTTATG-3 '
- downstream primer (SEQ ID NO: 14): 5 '-CGCGGATCCTCAGACTGGTGTTGGGTTGGATAT-3'.
- the PCR procedure is as follows:
- the PCR product was purified (see information published by Qiagen), then digested with BamHl and Sacl, recovered by gel, ligated with the vector PBI 121 (ligation site: BamHl and Sacl), and the expression of SEQ ID NO: 1 was inhibited.
- Recombinant plasmid The recombinant expression plasmid containing SEQ ID NO: 1 was transformed into Agrobacterium and transformed into Brassica napus by hypocotyl infiltration (see step 2).
- the precultured robust rape hypocotyls are separately immersed in the Agrobacterium containing the overexpressing recombinant plasmid of SEQ ID NO: 1 and the Agrobacterium containing the recombinant plasmid expressing SEQ ID NO: 1 for 30 s_l min, During the period of constant oscillation, the bacterial liquid was in full contact with the hypocotyl of rape. Quickly blot excess of the bacterial solution with sterile filter paper, and place the hypocotyls of the rapeseed on the co-culture medium (MS+ 2mg/L 6-BA, lmg/L 2, 4-D, 2. 5mg/L AgN0 3 , 19 On 62 mg/L AS), co-culture for 2 days.
- co-culture medium MS+ 2mg/L 6-BA, lmg/L 2, 4-D, 2. 5mg/L AgN0 3 , 19 On 62 mg/L AS
- the two hypocotyls of cole culture were respectively connected to the differentiation medium (MS+ 2mg/L 6-BA, lmg/L 2, 4-D,
- the screening medium MS+2mg/L 6-BA, 2. 5mg/L AgN0 3 , 500mg/L Carb, lOmg/L Kan
- the shoots were excised from the callus and transferred to rooting medium (1/2 MS, 0.15 mg/L NAA, 250 mg/L Cef).
- rooting medium 1/2 MS, 0.15 mg/L NAA, 250 mg/L Cef.
- SEQ ID NO: 1 Overexpression of SEQ ID NO: 1 and an expression-inducing transgenic plant containing SEQ ID NO: 1 developed a complete root system on rooting medium, respectively, and transferred to pot.
- the total DNA is extracted from the leaves, and the extracted DNA is used as a template to perform PCR detection.
- Upstream primer SEQ ID NO: 15: 5 ' ATTTCATTTGGAGAGAACACGG 3'
- Downstream primer (SEQ ID NO: 16): 5 ' TCAGACTGGTGTTGGGTTGGATAT 3 '
- the PCR procedure is as follows:
- Upstream Primer (SEQ ID NO: 17): 5' ATTTCATTTGGAGAGAACACGG 3'
- Downstream primer (SEQ ID NO: 18): 5' ATGTCGGATCATTTGAGTTTATG 3'
- the PCR procedure is as follows:
- the actin gene and the SEQ ID NO: 1 gene were PCR-amplified, respectively, and subjected to electrophoresis at 15, 18, 21, 24, 27, 30 cycles to determine Exponential growth period and platform period. Semi-quantitative PCR reactions (21 cycles) of samples were performed during the exponential growth phase.
- Example 5 Identification of temperature tolerance of transgenic plants containing SEQ ID NO:
- Brassica napus L. and Brassica napus transgenic lines containing SEQ ID NO: 1 After 5 days of heat stress, Brassica napus L. and Brassica napus transgenic lines containing SEQ ID NO: 1 have died, while Brassica napus transgenic plants containing SEQ ID NO: 1 are still alive and grow normally (see Figure 4-C, Figure 5-B).
- the heat resistance test results confirmed that the transgenic plants of Brassica napus L. containing overexpressed with SEQ ID NO: 1 were more resistant to temperature, while the transgenic plants of Brassica napus containing SEQ ID NO: 1 inhibited expression were resistant to heat. Decrease, indicating that the expression product of SEQ ID NO: 1 is functionally related to heat resistance.
- Example 6 Expression and detection of the polypeptide represented by SEQ ID NO:
- Upstream primer (SEQ ID NO: 19): 5 '-CCGGAATTCATGTCGGATCATTTGAGTTTATG-3 '
- downstream primer (SEQ ID NO: 20): 5 ' - GCTCTAGATC AGACTGGTGTTGGGTTGGATAT-3 '.
- the cell lysate was mixed with 50% glutathione-Sepharose resin homogenate, and 2 ml of resin was added per 100 ml of the cell culture, and gently shaken at room temperature for 30 min.
- Example 7 Substitutions and deletions of SEQ ID NO: 1 and expression and heat resistance analysis in E. coli
- the SEQ ID NO: 5 sequence was PCR amplified using the vector pET28 ligated with SEQ ID NO: 1 (the second serine at the N-terminus of SEQ ID NO: 2 was replaced with alanine and the fifth leucine) Replace with phenylalanine and delete three amino acids at the C-terminus, the encoded amino acid sequence is shown in SEQ ID NO: 6), and then ligated pGEM-T into the vector.
- Upstream primer (SEQ ID NO: 23): 5, -CCGGAATTCATGGCTGATGATTTCAG TTTATGTAC -3'
- downstream primer (SEQ ID NO: 24): 5' - CCGGAGCTCTTGGGTTGGATATTGGCGGCGGCTG -3'
- the nucleotide sequence of SEQ ID NO: 5 was amplified by PCR from the pGEM_T vector ligated with SEQ ID NO: 5.
- the PCR procedure is as follows:
- the PCR product was purified (see information disclosed by Qiagen), then digested with BamHl and Sacl, recovered by gel, ligated with PET28 (ligation sites: BamHl and Sac1), and the recombinant plasmid containing SEQ ID NO: 5 was obtained.
- the recombinant plasmid containing SEQ ID NO: 5 was transformed into ⁇ coli and plated on Amp-containing LB solid medium.
- a co7 pET28 strain containing the recombinant plasmid of SEQ ID NO: 4 was obtained.
- the coli pET28 strain containing the recombinant plasmid of SEQ ID NO: 5, and the control host strain coli pET28 were respectively coated with isopropyl- ⁇ -D-sulfurate at the same inoculum amount (0D 6 . . . 0.3).
- the solid medium of galactosides (IPTG) was cultured overnight at 42 °C.
- the control host strain £ coli pET28 did not grow after treatment at 42 ° C (see Figure 8-A); the recombinant plasmid pET28 strain containing SEQ ID NO: 5 grew well at 42 °C (see Figure 8-B).
- solutions such as PEG, mannitol, and sucrose can be used to simulate drought conditions to test the growth of plants.
- Hohl et al.'s multiple studies of the above-mentioned stress agents support the use of PEG as a penetrant to study the water relationship of plants.
- PEG with a molecular weight of 6000 is more effective than PEG with a lower molecular weight, such as PEG1000, 2000.
- PEG6000 has a large molecular weight and does not enter plant cells causing damage.
- the sucrose solution is susceptible to mold and is generally not used as a penetrant. Therefore, this example uses PEG 6000 to simulate drought stress conditions.
- transgenic (0E) rapeseed and non-transgenic wild type were selected for 100 uniform, full, disease-free rapeseed seeds for germination. Put 8 layers of absorbent paper into the culture dish, then put a layer of filter paper as the germination bed, and add 10 mL of 10% PEG6000 solution to the germination bed of the treatment group.
- the control group selected three One strain of transgenic (0E) and non-transgenic wild type (WT) 100 grains of uniform, full, disease-free rapeseed germination, then add 10mL of distilled water, placed in a constant temperature 25 ⁇ room under natural light for germination . After 7 days, the number of surviving seedlings was determined and the seedling rate was calculated. Ten seedlings were randomly selected to determine seedling height, main root length and fresh weight per plant. The test was repeated 3 times. The calculation and measurement methods are as follows:
- Relative germination rate (treatment germination rate / control germination rate) ⁇ % ;
- Relative seedling height (treated seedling height / control seedling height) X100%
- Relative fresh weight (treatment fresh weight / control fresh weight) X100%
- Relative vigor index (treatment seedling rate X treatment seedling height) I (control seedling rate X control seedling height) X100%;
- proline plays an important role in the adaptation of plant cells to stress, its action mainly includes intracellular osmo-regulators, reducing agents or energy sources, N-storage substances, hydroxyl radical scavengers, and protective agents for intracellular enzymes. And reduce intracellular acidity and regulate redox potential. Therefore, under normal culture conditions, the ability of transgenic TT1 strains to cope with osmotic stress caused by drought is stronger than that of wild type rapeseed.
- Upstream primer (SEQ ID NO: 25): 5'-CGCGGATCCATGTCGGATCATTTGAGTTTATG-3 '
- downstream primer (SEQ ID NO: 26): 5'-CCGGAGCTCTCAGACTGGTGTTGGGTTGGATAT-3 '.
- the PCR procedure is as follows:
- the harvested seeds are planted, and after 50 days, a few leaves are taken for PCR detection.
- the salt of saline-alkaline soil is usually NaCl, Na2S0, Na2C0 and NaHC03.
- salt stress can also cause ionic stress caused by the increase of Na ion, which affects the absorption of nutrients such as K ion and Ca ion. This causes damage to plants. Therefore, this experiment used NaCl to simulate salt stress conditions.
- each tube was accurately added with 1 ⁇ 21 toluene, shaken for 30 seconds, and allowed to stand for a while to transfer all the pigment to the toluene solution.
- proline plays an important role in the adaptation of plant cells to stress, its action mainly includes intracellular osmo-regulators, reducing agents or energy sources, N-storage substances, hydroxyl radical scavengers, and protective agents for intracellular enzymes. And reduce intracellular acidity and regulate redox potential. Therefore, under normal culture conditions, the transgenic TT1 gene Arabidopsis thaliana is more potent than the wild RLD type in response to osmotic stress caused by saline.
- Example 14 Growth experiment of SEQ ID NO: 1 gene microorganism under various sputum conditions
- the preparation medium the LB liquid medium was prepared, and the antibiotics were added with 50 mg/ml, Cam 50 ug/ml and 0.1 mM IPTG, and the pH was adjusted to 4. 0, 5. 5, 7. 0, 8. 5 After 10.0, add the test tubes, and install 2 tubes for each pH, 5 ml per tube, for use.
- Test bacteria Add the test bacteria: Add the activated bacterial solution 0. 05ml to each LB liquid medium at each PH level, shake well and shake culture (37 °C, 225 rpm, 14h).
- E. coli transformed with the TT1 thermotolerant gene had higher acid-base tolerance than non-transgenic E. coli.
- the growth of the TT1 gene (T) and the non-transgenic (C) were basically the same.
- the concentration of the bacteria was basically the same.
- the growth of TT1 gene (T) and non-transgenic (C) was different.
- the concentration of the bacterial liquid is low; at pH 4.0, the concentration of the transgenic TT1 gene (T) is high, and the non-transgenic (C) bacteria hardly grow.
- TT1 gene (T) Under alkaline conditions, there are also differences in the growth of the TT1 gene (T) and the non-transgenic (C). As can be seen, at pH 8.5, the concentration of the TT1 gene (T) is higher, non-transgenic. (C) The concentration of the bacterial liquid is low; at pHIO, the concentration of the transgenic TT1 gene (T) is high, and the non-transgenic (C) bacteria hardly grow.
- TT1 gene Escherichia coli and non-transgenic Escherichia coli was measured at 37 °C and pH 4.0.
- Beijing Pudongtong Instrument Co., Ltd. TU-1800 UV spectrophotometer the greater the 0D value , indicating that the concentration of the bacterial liquid is larger, as shown in the figure, the slope of the growth curve of the transgenic TT1 gene is significantly larger than that of the non-transfected TT1 gene, indicating that the growth rate of the transgenic TT1 E. coli is significantly greater than that of the non-transfected TT1 gene.
- Bacillus Example 15 Preliminary Mechanism Study of SEQ ID NO: 1 Gene Enhancing Stress Resistance
- the invention uses the coli CHIP Version 2. 0 gene chip sold by Bao Bioengineering (Dalian) Co., Ltd., according to its storytelling (see Table 4 for gene screening standards), Escherichia coli overexpressing TT1 gene and blank control Escherichia coli The genomic expression was compared to investigate the mechanism by which TT1 gene enhances microbial acid and alkali resistance and plant salt and alkali resistance.
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Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/055,299 US8586830B2 (en) | 2008-07-29 | 2009-07-23 | Ioslated TT1 polynucleotide, encoded proteins and vectors for increasing tolerance of plants and microbes to abiotic stresses and the use thereof |
| EP20090807842 EP2319930A4 (en) | 2008-07-29 | 2009-07-23 | GENES, PROTEINS AND VECTORS FOR INCREASING THE TOLERANCE OF PLANTS AND MICROBES AGAINST ABIOTIC STRESSES AND USES THEREOF |
| CN2009801190462A CN102112613B (zh) | 2008-07-29 | 2009-07-23 | 提高植物和微生物抗逆性的基因、多肽、载体及其应用 |
| BRPI0916604A BRPI0916604A2 (pt) | 2008-07-29 | 2009-07-23 | genes, proteínas e vetores para aumentar tolerância de plantas e micróbios à tensão abiótica e uso dos mesmos |
| CA2732493A CA2732493C (en) | 2008-07-29 | 2009-07-23 | Genes, proteins and vectors for increasing tolerance of plants and microbes to abiotic stresses and the use thereof |
| AU2009284619A AU2009284619B2 (en) | 2008-07-29 | 2009-07-23 | Genes, proteins and vectors for increaseing tolerance of plants and microbes to abiotic stresses and the use thereof |
| EA201170263A EA024524B1 (ru) | 2008-07-29 | 2009-07-23 | Гены, белки и векторы для повышения устойчивости растений и микроорганизмов к абиотическим стрессам и их применение |
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| CN200810045667A CN101638658A (zh) | 2008-07-29 | 2008-07-29 | 提高植物和微生物耐热性的基因、多肽及其应用 |
| CN200810045667.8 | 2008-07-29 |
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| US (1) | US8586830B2 (zh) |
| EP (1) | EP2319930A4 (zh) |
| CN (2) | CN101638658A (zh) |
| AU (1) | AU2009284619B2 (zh) |
| BR (1) | BRPI0916604A2 (zh) |
| CA (1) | CA2732493C (zh) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979407A (zh) * | 2010-10-14 | 2011-02-23 | 北京市农林科学院 | 一种植物抗旱、耐盐相关蛋白TaCRF2及其编码基因和应用 |
| CN102140133A (zh) * | 2010-12-22 | 2011-08-03 | 北京市农林科学院 | 一种植物抗旱、耐盐相关蛋白ErABF1及其编码基因和应用 |
| CN114671930A (zh) * | 2020-12-24 | 2022-06-28 | 中国农业大学 | ZmNF-YA1蛋白及其在调控植物对盐碱的耐逆性中的应用 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102168097B (zh) * | 2010-01-28 | 2014-02-12 | 四川贝安迪生物基因工程有限公司 | 编码提高植物和微生物耐热性的蛋白质的基因及其用途 |
| CN102311490B (zh) * | 2010-07-08 | 2014-10-22 | 中国科学院上海生命科学研究院 | 一种植物抗热基因JAZ5a及其应用 |
| US9714432B2 (en) | 2011-07-07 | 2017-07-25 | Keygene N.V. | Use of JAZ5a for improving drought-resistance in a plant |
| CN109486801B (zh) * | 2018-10-26 | 2021-05-14 | 中国科学院遗传与发育生物学研究所 | 水稻高环境温度适应性响应控制基因OsTOGR2及其应用 |
| CN111647527B (zh) * | 2020-05-21 | 2023-01-06 | 浙江工业大学 | 一种利用枯草芽孢杆菌改良盐碱土和保肥的方法 |
| CN113046371A (zh) * | 2021-03-22 | 2021-06-29 | 云南中烟工业有限责任公司 | 一种烟草过氧化物酶相关的基因及其应用 |
| CN114807222B (zh) * | 2022-06-16 | 2023-08-22 | 郑州大学 | 白菜型油菜Bra040707基因在干旱胁迫中的应用 |
| CN119120764B (zh) * | 2024-10-15 | 2026-02-10 | 北京大学 | 羊草抗旱性状相关的snp分子标记及应用 |
| CN121204142B (zh) * | 2025-12-01 | 2026-03-27 | 中国农业科学院油料作物研究所 | 油菜耐渍基因BnC07ABF3在提高植物耐渍性中的应用 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979407A (zh) * | 2010-10-14 | 2011-02-23 | 北京市农林科学院 | 一种植物抗旱、耐盐相关蛋白TaCRF2及其编码基因和应用 |
| CN101979407B (zh) * | 2010-10-14 | 2012-08-22 | 北京市农林科学院 | 一种植物抗旱、耐盐相关蛋白TaCRF2及其编码基因和应用 |
| CN102140133A (zh) * | 2010-12-22 | 2011-08-03 | 北京市农林科学院 | 一种植物抗旱、耐盐相关蛋白ErABF1及其编码基因和应用 |
| CN102140133B (zh) * | 2010-12-22 | 2012-08-22 | 北京市农林科学院 | 一种植物抗旱、耐盐相关蛋白ErABF1及其编码基因和应用 |
| CN114671930A (zh) * | 2020-12-24 | 2022-06-28 | 中国农业大学 | ZmNF-YA1蛋白及其在调控植物对盐碱的耐逆性中的应用 |
| CN114671930B (zh) * | 2020-12-24 | 2023-03-24 | 中国农业大学 | ZmNF-YA1蛋白及其在调控植物对盐碱的耐逆性中的应用 |
Also Published As
| Publication number | Publication date |
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| EP2319930A4 (en) | 2012-05-02 |
| AU2009284619B2 (en) | 2013-06-20 |
| CA2732493A1 (en) | 2010-02-25 |
| EA201170263A1 (ru) | 2011-06-30 |
| AU2009284619A1 (en) | 2010-02-25 |
| CN101638658A (zh) | 2010-02-03 |
| CN102112613B (zh) | 2013-10-09 |
| BRPI0916604A2 (pt) | 2017-07-04 |
| US8586830B2 (en) | 2013-11-19 |
| CN102112613A (zh) | 2011-06-29 |
| CA2732493C (en) | 2015-10-27 |
| EP2319930A1 (en) | 2011-05-11 |
| EA024524B1 (ru) | 2016-09-30 |
| US20110258740A1 (en) | 2011-10-20 |
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