WO2013067719A1 - 一种用于生产新型微生物源杀菌剂的生物工程菌株及其应用 - Google Patents
一种用于生产新型微生物源杀菌剂的生物工程菌株及其应用 Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/60—1,4-Diazines; Hydrogenated 1,4-diazines
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- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
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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
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- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/93—Ligases (6)
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- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
- C12P17/10—Nitrogen as only ring hetero atom
- C12P17/12—Nitrogen as only ring hetero atom containing a six-membered hetero ring
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- C12Y—ENZYMES
- C12Y603/00—Ligases forming carbon-nitrogen bonds (6.3)
- C12Y603/05—Carbon-nitrogen ligases with glutamine as amido-N-donor (6.3.5)
- C12Y603/05004—Asparagine synthase (glutamine-hydrolyzing) (6.3.5.4)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Definitions
- the invention belongs to the technical field of microbial source pesticide production, and particularly relates to a bioengineered strain for producing a novel microbial source fungicide and an application thereof.
- Pesticides are difficult to decompose and will accumulate in the ecosystem for a long time, causing environmental pollution, which is not conducive to the sustainable development of the social economy.
- existing chemical pesticides are not completely effective for certain plant diseases. Therefore, while striving to develop a new generation of chemical pesticides, it is also necessary to vigorously research and develop bio-sourced pesticides that are efficient, safe, economical, and environmentally compatible.
- bio-sourced pesticides that have been promoted in production are relatively small, and some varieties have been resistant to plant pathogenic bacteria due to their long-term use, and the control effect is not satisfactory.
- the agent for controlling the disease mainly relies on the old bio-sourced pesticide, Jinggangmycin.
- Bio-pesticide promotes antagonistic M18 has an efficient, safe and broad-spectrum bactericidal effect on plant diseases, has good compatibility with the environment, and is easy to disintegrate in the environment.
- the growth-promoting antibacterial M18 was deposited on June 27, 2000 at the Chinese Patent Office: Beijing, China Microbial Culture Collection Management Committee General Microbiology Center, the deposit number is CGMCC NO.
- bio-pesticide-promoting antibacterial activity M18 is a live bacterial agent, and its mechanism of action is mainly to inhibit the plant pathogenic bacteria by synthesizing the active ingredients against plant diseases by M18 live bacteria, and the content of the synthesized active ingredients is easy. It is affected by the metabolic regulation mechanism of the bacteria itself and environmental conditions. Therefore, the control effect on plant diseases Defects with instability, it is difficult to carry out large-scale popularization and application in agricultural production.
- the main active ingredient of the antagonistic antibacterial agent M18 for controlling plant diseases is phenazine-1-carboxylic acid, which extracts phenazine-1-carboxylic acid from the fermentation broth of the probiotic antagonistic M18, using active ingredients instead of living
- the control of crop diseases on crop diseases is also characterized by high efficiency, safety, broad spectrum and good compatibility with the environment. At the same time, it can overcome the defects of using the growth-promoting antagonistic M18 to control the instability of diseases.
- the genetically engineered method was used to carry out the directed inactivation mutation of the two-component regulatory gene gacA in the pro-active antagonistic M18 genome, and the M18-derived strain M18G was obtained, which greatly improved the phenazine-1-carboxylic acid.
- the yield is about 1500-1700 mg per liter.
- the technical method of the research results has been published in the Journal of Microbiology, Vol. 44, pp. 761 ⁇ 765, in the title of "Pseudomonas gacA insertion mutation on anaphyllin and phenazine-1-carboxylic acid anabolism. Differential regulation.
- the Chinese invention patent entitled "Method for preparing bactericides by promoting growth-promoting antibacterial M18-derived strains" provides a use of the pro-amphibitory antibacterial M18-derived strains M18G and M18R.
- the method for preparing a bactericide is to prepare a bactericide by using a metabolite of a microorganism instead of a living organism of a microorganism, and the purpose of improving the control effect is achieved by compounding the metabolites of the two derived strains.
- the invention utilizes a strain producing phenazine-1-carboxylic acid, carrying a gene capable of expressing and encoding PhZH (gl U tamin e phenazine-l-carboxylic acid amidotransferase, glutamine phenazine-1-carboxylic acid amide transferase, PhzH)
- PhZH gl U tamin e phenazine-l-carboxylic acid amidotransferase, glutamine phenazine-1-carboxylic acid amide transferase, PhzH
- the recombinant expression plasmid is supplemented and added to the copy number of the gene and expressed in an engineered strain to convert phenazine-1-carboxylic acid to phenazine-1-carboxylic acid amide.
- the antibacterial activity of phenazine-1-carboxylic acid amide is not affected by the acidity value of the conditions of use, thereby stabilizing its antibacterial activity and more effectively controlling crop diseases.
- the present invention firstly discloses a bioengineered strain for producing a microbial source bactericide, which is obtained by converting a ⁇ ⁇ / gene recombinant expression plasmid into a strain producing phenazine-1-carboxylic acid, the bioengineered strain producing phenotype Pyrazine-1-carboxylic acid amide.
- the invention also discloses a method for constructing the bioengineered strain for producing the microbial source fungicide, comprising the following steps:
- the constructed / ⁇ z/gene recombinant expression plasmid was introduced into a strain producing phenazine-1-carboxylic acid to construct the bioengineered strain for producing a microbial source fungicide.
- the recombinant expression plasmid is a recombinant expression plasmid in which a phz# gene fragment is cloned.
- the phzi can express/gene in the phenazine-1-carboxylic acid-producing strain due to the recombinant expression plasmid, and encodes PhzH (glutamine phenazine-1-carboxylic acid amide transferase).
- the ⁇ ⁇ / gene of the present invention comprises the coding region of the gene and its non-coding region.
- the ⁇ ⁇ / gene fragment may be a complete ⁇ ⁇ / gene or a part of ⁇ ⁇ / gene.
- the ⁇ ⁇ / gene fragment of the present invention should contain at least the entire coding region of ⁇ ⁇ / gene.
- the gene fragment comprises the entire coding region of the gene and the non-coding region at the 5' end thereof.
- the non-coding region at the 5' end of the ⁇ gene fragment may be a partial or complete / ⁇ z / gene 5' non-coding region.
- the 5' non-coding region of the gene contained in the gene fragment should facilitate the expression of PhzH.
- the non-coding region at the 5' end of the gene fragment contains a polynucleotide fragment from the first base upstream of the p ⁇ /gene translation initiation codon to the 683th base upstream thereof.
- the PhzH is PhzH of Pseudomonas.
- the gene fragment is a gene of Pseudomonas Fragment.
- the Pseudomonas is Pseudomonas aeruginosa or Pseudomonas chlororaphis.
- the amino acid sequence is SEQ ID NO: 1:
- the / ⁇ z / gene fragment is derived from the Pseudomonas aeruginosa strain PA01 genome.
- the base sequence of SEQ ID NO: 2 gtccgaggac ccgtgcagcg ggccggtgtt cggtccgtcg acctgcgaat gcccttgagg 60 taggtcgtct ggcgggcccg gtgcagcggg cccgcttccg gatgtatcgc tcgctcgaag 120 ttgccttcttt taattctcca cgccctactt ttccccgcgcgcgc 240 atctgagttt gttgtagtca ttccccgcgtcgtccatcgtc 240 atctgagtt
- the expression vector for constructing the recombinant plasmid is an Escherichia coli/Pseudomonas shuttle expression plasmid.
- the E. coli/Pseudomonas shuttle expression plasmid contains a strong promoter, and the ⁇ ⁇ / gene fragment is cloned after the strong promoter, and the strong promoter is Control its expression.
- the strong promoter may be the bacteriophage promoter ⁇ 3 prom or ⁇ 7 prom. Insertion of the gene of interest at a specific position of the plasmid and ensuring that the reading frame of the gene of interest is correct is a technique well known to those skilled in the art.
- the E. coli/Pseudomonas shuttle expression plasmid can be a pBBR1MCS series plasmid and various expression plasmids derived therefrom. As exemplified in the examples, the E. coli/Pseudomonas shuttle expression plasmid is pBBR1MCS-5.
- the gene expression vector pBBRphzH can be obtained under the control of the phage promoter T3 prom of pBBR1MCS-5 by appropriate primer design, amplification/gene fragmentation under the premise of correct reading frame.
- the phenazine-1-carboxylic acid-producing strain refers to a wild type strain which can produce phenazine-1-carboxylic acid by fermentation and an engineered strain derived therefrom. Further, the phenazine-1-carboxylic acid-producing strain belongs to Pseudomonas, such as M18 and M18G. The storage number of the M18 is CGMCC NO.
- M18G strain is a derivative strain of M18 (CGMCC NO. 0462) and is a prior art.
- the preparation method thereof is well known, for example, in 2004, in the Journal of Microbiology, Vol. 44, pp. 761-765, "Pseudomonas gacA insertion mutation differentially regulates the anabolism of lignan and phenazine-1-carboxylic acid. ⁇ .
- the yield of phenazine-1-carboxylic acid of M18G is greatly improved, and therefore, the preferred phenazine-1-carboxylic acid engineering strain of the present invention is M18G. Since the wild type strain producing phenazine-1-carboxylic acid and the engineered strain derived therefrom can produce phenazine-1-carboxylic acid, the / ⁇ z / gene recombinant expression plasmid can produce phenazine-1-carboxylic acid.
- the engineered strain expresses ⁇ ⁇ /gene, which encodes the product glutamine phen Pyrazine-l-carboxylic acid amide transferase can amidate phenazine-l-carboxylic acid to synthesize phenazine-1-carboxylic acid amide (the molecular structure of phenazine-1-carboxylic acid amide is shown in Figure 1).
- the metabolite of the bioengineered strain of the invention contains phenazine-1-carboxylic acid amide.
- the method for introducing a ⁇ ⁇ /gene recombinant expression plasmid into a phenazine-1-carboxylic acid-engineered strain is a conventional transformation or transduction method.
- the bioengineered strain of the present invention for producing a microbial source bactericide can be used for fermentative production of the microbial source bactericide of the present invention.
- the present invention further provides a microbial source bactericide which is a fermentation broth of the bioengineered strain of the present invention.
- the main bactericidal active ingredient is phenazine-1-carboxylic acid amide.
- it contains a trace amount of the bactericidal active ingredient garcinia.
- the content of phenazine-1-carboxylic acid amide is 2,500 to 2,800 mg per liter.
- the invention further discloses a preparation method of the microbial source bactericide, which is obtained by fermenting the bioengineered strain of the invention under the condition of appropriately expressing phenazine-1-carboxylic acid and PhzH. Further, the method for preparing the microbial source bactericide comprises the following steps:
- Seed expansion culture After shaking flask culture in glycerol culture solution, transfer to the fermentation medium to obtain fermentation broth.
- the engineered strain can be activated by solid glycerol medium activation.
- the weight percentage of the components contained in the glycerin culture solution is: peptone 1.8 ⁇ 2.2%, glycerol 1.3 ⁇ 1.7%, magnesium sulfate 0.05 ⁇ 0.1%, potassium dihydrogen phosphate 0.01 ⁇ 0.05%, balance water, pH 6.8 ⁇ 7.2.
- the weight percentage of the components contained in the solid glycerin medium is: peptone 1.8 ⁇ 2.2%, glycerol 1.3 ⁇ 1.7%, magnesium sulfate 0.05 ⁇ 0.1%, potassium dihydrogen phosphate 0.01 ⁇ 0.05%, agar 1.2-1.5%, The balance is water, pH 6.8 ⁇ 7.2.
- the component weight percentage of the vegetative culture solution is: peptone 2.2 ⁇ 3.0%, glucose 2.0 ⁇ 2.5%, potassium nitrate 0.5 ⁇ 0.7%, balance is water, pH 6.5 ⁇ 7.0.
- the activation condition of the engineering strain is: connecting the engineering bacteria to the glycerin culture plate at 26 to 30 ° C, Activated growth for 20 to 24 hours; then sterilized on a plate of glycerol medium again, 26 ⁇ 3 (activated for 10 to 12 hours under TC.
- the seed expansion culture shake the flask in glycerol culture solution
- the culture conditions are as follows: the activated strain is connected to the glycerol culture solution, and shake cultured at 26 to 30° C. for 9 to 11 hours. When the culture is shaken, the shaker rotation speed may be 160 to 180 rpm.
- the conditions for amplifying the fermentation culture in the culture medium for the production of the fermented broth are: transferring the strain cultured in the glycerol culture solution to the culture medium containing the production hormone, and fermenting the culture at 60 to 30 ° C for 60 to 72.
- the shaking speed of the shaker may be 160 to 180 rpm.
- the microbial source bactericide of the present invention can be used for controlling plant diseases or for preparing a medicament for controlling plant diseases.
- the present invention further discloses an agent for controlling plant diseases, comprising a bactericidal effective amount of the microbial source bactericide of the present invention or a bactericidal active ingredient thereof.
- the fermentation broth of the bioengineered strain for producing the microbial source bactericide is directly used as a medicament for controlling plant diseases; the broth can be dried as a powder and then used as a bactericidal active ingredient raw material together with other conventional excipients to control plant diseases.
- the phenazine-1-carboxylic acid amide which is the main bactericidal active ingredient in the fermentation broth, may be isolated and used as a bactericidal active ingredient raw material for formulating a medicament for controlling plant diseases.
- the present invention utilizes phenazine-producing agent-1.
- the genetically engineered strain of carboxylic acid carries a recombinant expression vector, and the method for producing phenazine-1-carboxylic acid amide has the following advantages:
- the phenazine-1-carboxylic acid amide produced by the present invention has high-efficiency antifungal ability, and is not affected by the acidity of the use environment in the range of pH 4.0 to 0.8, regardless of the acidity in the planting. It is also used on crops in an alkaline environment to achieve stable control effects.
- phenazine-1-carboxylic acid in a host is converted into phenazine-1-carboxylic acid amide by constructing a recombinant plasmid carrying the entire coding region of the gene/gene and the non-coding region at the 5' end thereof.
- the / ⁇ z / gene and its 5 ' non-coding region fragment are efficiently expressed under the control of the phage strong promoter T3 prom , and the recombinant plasmid has multiple copies in the host M18G , and the gene in the host M18G A large amount of expression and synthesis of amidase, The phenazine-l-carboxylic acid is completely converted into phenazine-l-carboxylic acid amide, and the conversion efficiency can reach 100%.
- Figure 1 shows the molecular structural formula of phenazine-1-carboxylic acid amide in the present invention.
- Figure 2 is a schematic diagram showing the construction of the plasmid pBBRphzH in the present invention.
- the invention relates to a method for producing phenazine_1_carboxylic acid amide by using the engineering strain M18G carrying the plasmid pBBRphzH, and amplifying the ⁇ ⁇ / gene and the 5 ' non-coding region fragment thereof from the P. aeruginosa PA01 genome.
- the fragment was inserted into the expression plasmid pBBR1MCS-5 and placed under the control of the phage promoter T3 prom to construct the recombinant plasmid pBBRphzH.
- the recombinant plasmid was then introduced into the proliferating antagonist M18-derived strain M18G to construct a genetic engineering. Strain M18G/pBBRphzH.
- This engineered strain achieved an efficient and stable expression of the glutamine phenazine-1-carboxylic acid amide transferase PhzH.
- the genetically engineered strain M18G/pBBRphzH was cultured in the culture medium to efficiently and stably produce phenazine_1-carboxylic acid amide.
- the phenazine-1-carboxylic acid amide is prepared by using the high-yield genetic engineering strain of the invention, and the effect of controlling the disease is not affected by the acidity condition, and the production cost can be further reduced, and the plant can be effectively controlled whether used in an acidic or alkaline environment. Disease.
- Figure 3 is the same concentration of phenazine-1-carboxylic acid (PCA) and phenazine-1-carboxylic acid amide (PCN), antibacterial activity against Rhizoctonia solani in potato glucose medium with different acidity conditions Comparison of the results of the map.
- the weight percentage of potato glucose medium used in the experiment was 20% for potato, 2% for glucose, and 1. 2% for agar powder. The balance was water.
- a preferred embodiment of the present invention constructs the genetically engineered strain M18G/pBBRphzH by carrying the recombinant plasmid pBBRphzH by using the proliferating antagonist M18-derived strain M18G, and complements and adds the complete coding region of the gene in the M18G strain. And the copy number of the non-coding region fragment of its 5' end, the phenazine-1-carboxylic acid is converted to phenazine-1-carboxylic acid amide to produce phenazine-1-carboxylic acid amide.
- a preferred embodiment of the present invention amplifies the entire coding region of the ⁇ ⁇ / gene and the non-coding region fragment thereof at the 5' end from the P.
- aeruginosa strain PA01 aeruginosa strain PA01, and inserts the fragment into the expression plasmid pBBR1MCS-5, and is placed in the phage promoter.
- the recombinant plasmid pBBRphzH was constructed.
- the recombinant plasmid pBBRphzH was introduced into the proliferating antagonist M18-derived strain M18G to construct a genetically engineered strain M18G/pBBRphzH, which can achieve high efficiency and stability of the gene. expression.
- the genetically engineered strain M18G/pBBRphzH was cultured in the culture medium to produce phenazine-1-carboxylic acid amide efficiently and stably, instead of phenazine-1-carboxylic acid, and the yield of phenazine-1-carboxylic acid amide reached liters per liter. 2500 ⁇ 2800 mg level.
- the activity of phenazine-1-carboxylic acid amide against rice sheath blight was increased by more than 5 times compared with phenazine-1-carboxylic acid.
- the antibacterial activity of phenazine-1-carboxylic acid amide produced per unit volume of fermentation broth greatly exceeds the antibacterial activity of phenazine-1-carboxylic acid.
- the specific scheme for constructing the genetic engineering strain M18G/pBBRphzH and using the strain to produce phenazine_1-carboxylic acid amide is:
- the underline is the restriction endonuclease 3 ⁇ 4 0 I, /i2t III
- the restriction enzyme cleavage site; then using Pseudomonas aeruginosa PA01 genomic DNA as a template, using DNA polymerase 73 ⁇ 4 and designed primers, amplifying the non-coding region fragment of the z/gene and its 5' end, and amplifying the product through agar
- the sugar electrophoresis assay detects a 2.5 kb ⁇ ⁇ /gene and a 5' non-coding region fragment thereof.
- a pair of primers were designed to amplify the / ⁇ /gene and its non-coding region fragment at the 5' end.
- the nucleotide sequence of the primer is as follows:
- the underlined nucleotide in the sequence is the restriction endonuclease ⁇ 3 ⁇ 4. I, III enzyme cleavage sites.
- the primer was commissioned by Shanghai Shenggong Bioengineering Co., Ltd. for synthesis. Then, using Pseudomonas aeruginosa PA01 genomic DNA as a template, using DNA polymerase 73 ⁇ 4 ⁇ and the primers designed above, the entire coding region of the / ⁇ z / gene and the non-coding region of the 5' end were amplified, and the product was passed.
- the electrophoresis was carried out to recover a complete coding region of ⁇ ⁇ / gene and a fragment of the non-coding region at the 5' end of the gene, and the gene fragment was verified to be accurate by nucleotide sequencing.
- the Pseudomonas aeruginosa PA01 genomic DNA is prepared by using the AxyPr printing bacterial genomic DNA kit, and the gene fragment is recovered by using the AxyPrep DNA gel recovery kit, both of which are manufactured by Aisijin Biotechnology (Hangzhou) Co., Ltd.
- the catalog numbers are AP-MN-BT-GDNA-4 and AP-GX-50, respectively; the conditions of the gene amplification reaction and agarose electrophoresis are edited according to J. Sambrook, DW Russell, respectively.
- the DNA polymerase LA 73 ⁇ 4 ⁇ and the gene amplification kit were purchased from TAKARA Shanghai Agency, catalog number: DRR002AG. Agarose was purchased from GENE TECH's Shanghai agency.
- the nucleotide sequencing of the gene fragment (/ ⁇ and its non-coding region at the 5' end) was commissioned by Shanghai Yingjun Biotechnology Co., Ltd., and the sequencing result confirmed that the gene fragment contained SEQ ID NO: 2, and the encoded amino acid sequence of the protein was SEQ ID NO: 1.
- the pBBRphzH-transformed E. coli transformants were screened on gentamicin-resistant plates; finally, the constructed recombinant plasmid pBBRphzH was extracted from E. coli transformants and verified.
- the constructed recombinant plasmid pBBRphzH is shown in Figure 2.
- the complete coding region of the gene and the non-coding region of the 5' end thereof were digested with restriction enzymes o and ffi ⁇ III, and then inserted into the plasmid under the action of ligase.
- pBBR1MCS-5 The corresponding restriction site in pBBR1MCS-5 was placed under the control of phage promoter T3 prom to construct recombinant plasmid P BBRphzH.
- 4766 bp indicates the length of the plasmid pBBR1MCS-5, which is 4766 base pairs; in the figure, it represents the gene encoding the glutamine phenazine-1-carboxylamide transferase; ⁇ is the symbol of the shortened fragment of the gene; 3 ⁇ 4o I, III is a restriction endonuclease site; the numbers in the figure indicate the coding sequence of the gene linked to the pBBR1MCS-5 plasmid and the length of the nucleotide sequence of the 5 'non-coding region, respectively, 1833 bp and 683 bp; Gm is The selectable marker gene for gentamicin in plasmid pBBR1MCS-5; T3 prom and T7 prom are two
- Plasmid PBBR1MCS-5 plasmid was provided by Shanghai Jiaotong University School of Life Science and Technology. Restriction enzymes and ligases were purchased from Shenzhen Zhongjing Biotechnology Co., Ltd. The recombinant plasmid was extracted from E.
- plasmid B rapid extraction kit provided by Beijing Boda Tektronix Biogene Technology Co., Ltd., catalog number: MK014-2.
- the restriction enzymes, DNA polymerase and gene amplification kits used for the verification of recombinant plasmids were purchased from TAKARA Shanghai Agency, catalog number: DRR002AG. Agarose was purchased from GENE TECH's Shanghai agency.
- the obtained phenazine-1-carboxylic acid amide content was 2500 mg per liter, and the content of phenazine-1-carboxylic acid was not detected, indicating that all phenazine-1-carboxylic acid had been converted to phenazine-1-carboxylate.
- the acid amide showed that the conversion of phenazine-1-carboxylic acid to phenazine-1-carboxylic acid amide was 100%.
- the weight percentage of the components in the glycerin broth is: 8%, glycerol, 1.3%, magnesium sulfate 0. 07%, potassium dihydrogen phosphate, 0.03%, balance water, pH7 . 0.
- the glycerin medium (solid) also contains Agar 1.5%.
- the yield of phenazine_1-carboxylic acid amide was 652.5 mg in 65 ml of M18G/pBBRphzH fermentation broth, and the content of phenazine-1-carboxylic acid was zero, diluted in a certain ratio, and configured per liter.
- Potato glucose medium (pH 7.0) containing 16 mg of phenazine-1-carboxylic acid amide, while diluting M18G/pME6032Phz fermentation broth (ZL200910198664. 2) in a certain ratio, with 16 mg of phenazine_1 per liter.
- the potato glucose medium (pH 7.0) of the carboxylic acid was measured with potato glucose medium (pH 7.0) without fermentation broth, and the rice bacterial blight was measured in various potato glucose medium (pH 7.0).
- the growth rate in the middle, and the bacteriostatic activity of phenazine-1-carboxylic acid amide and phenazine-1-carboxylic acid were calculated according to the calculation method of Example 6, and calculated according to the biological activity under the same pH 7.0 condition.
- the bacteriostatic activity is increased by about 1.9 times, the bacteriostatic activity is increased by about 1.9 times.
- the singularity of about 2. 5 kb is obtained by the same method as in Example 1 and the entire coding region of the gene and the non-coding region of the 5' end. ⁇ ⁇ / gene and its non-coding region fragment at the 5' end.
- the recovered / ⁇ ⁇ / gene and its 5' non-coding region fragment were digested with restriction endonuclease 3 ⁇ 4o I, Hind III, ligase ligated, and inserted into Escherichia coli / Pseudomonas shuttle plasmid PBBR1MCS -5, and the expression of the gene and its 5' non-coding region fragment was placed under the control of the phage promoter T3 prom to form the recombinant plasmid pBBRphzH and transformed into E. coli.
- the E. coli transformants transformed with PBBRphzH were screened on gentamicin-resistant plates; finally, recombinant plasmids were extracted from E. coli transformants and verified.
- the competent cells of the M18-derived strain M18G were prepared, and the recombinant plasmid pBBRphzH was transformed into a competent cell of M18G, and cultured at 30 ° C for 1 day.
- a method for preparing a competent cell for promoting the antagonistic M18-derived strain M18G, a method for transforming a recombinant plasmid pBBRphzH into a competent cell of M18G, and a screening method for a genetically engineered strain M18G/pBBRphzH for efficiently producing phenazine-1-carboxylic acid amide is the same Example 1.
- the genetically engineered strain M18G/pBBRphzH was inoculated on a plate of glycerol medium, activated and grown at 28 ° C for 22 hours, and then sterilized on a plate of glycerol medium again, activated at 28 ° C for 11 hours, then Activated Transfer the M18G/pBBRphzH bacteria to a flask containing 25 ml of glycerol medium in a volume of 250 ml, shake culture in a shaker at 28 ° C for 10 hours, and shake the speed at 170 rpm.
- the weight percentage of the components contained in the glycerin medium is: peptone 2.2%, glycerol 1.7%, magnesium sulfate 0.05%, potassium dihydrogen phosphate 0.01%, balance water, pH 7.2.
- the glycerin medium (solid) also contained agar 1.5%.
- the component weight percentage of the vegetative culture solution was: peptone 2.2%, glucose 2.5%, potassium nitrate 0.5%, balance water, pH 7.2.
- the yield of phenazine_1-carboxylic acid amide was 655.5 mg in 65 ml of M18G/pBBRphzH fermentation broth, and the content of phenazine-1-carboxylic acid was zero, diluted in a certain ratio, and contained 16 per liter.
- the potato glucose medium (pH 7.0) was used to determine the rice sheath blight fungus in various potato glucose medium (pH 7.0) with the potato dextrose medium (pH 7.0) without fermentation broth.
- the growth rate, and the bacteriostatic activity of phenazine-1-carboxylic acid amide and phenazine-1-carboxylic acid were calculated according to the calculation method of Example 6, and calculated according to the bacteriostatic activity under the same pH 7.0 conditions.
- the yield of phenazine_1-carboxylic acid amide obtained from the fermentation broth of M18G/pBBRphzH was equivalent to the antibacterial effect of 13500 mg of phenazine_1-carboxylic acid, and the antibacterial activity was increased by about 2.1 times.
- the recovered / ⁇ z/ gene and its 5' non-coding region fragment were digested with restriction endonuclease 3 ⁇ 4o I and Hind III, and inserted into E. coli/Pseudomonas shuttle under the action of ligase.
- the corresponding restriction site in the expression plasmid PBBR1MCS-5 was placed under the control of the phage promoter T3 prom to form a recombinant plasmid pBBRphzH and transformed into E. coli.
- E. coli transformants transformed with pBBRphzH were screened on gentamicin-resistant plates; finally, from the large intestine rod
- the recombinant plasmid was extracted from the bacteria and verified.
- a method for preparing a competent cell for promoting the antagonistic M18-derived strain M18G, a method for transforming a recombinant plasmid pBBRphzH into a competent cell of M18G, and a screening method for a genetically engineered strain M18G/pBBRphzH for efficiently producing phenazine-1-carboxylic acid amide is the same Example 1.
- the engineering strain M18G/pBBRphzH constructed by genetic engineering technology was inoculated on a plate of glycerol medium, activated and grown at 30 ° C for 20 hours, and then sterilized on a plate of glycerol medium again, 30 ° C After activation for 12 hours, the activated M18G/pBBRphzH strain was transferred to a flask containing 25 ml of glycerol medium in a volume of 250 ml and amplified by shaking at 11 ° C for 11 hours in a shaker at 30 ° C.
- the yield of phenazine-1-carboxylic acid amide was 2800 mg per liter.
- the content of phenazine-1-carboxylic acid was not detected, indicating that all phenazine-1-carboxylic acid had been converted to phenazine-1-carboxylic acid amide.
- the results showed that the conversion of phenazine-1-carboxylic acid to phenazine-1-carboxylic acid amide was 100%.
- the weight percentage of the components in the glycerin medium is: peptone 2.0%, glycerol 1.5%, magnesium sulfate 0.1%, potassium dihydrogen phosphate 0. 05%, balance water, pH6 5 % ⁇
- a glycerin medium (solid) also contains agar 1. 5 %. 0 ⁇
- the composition of the composition of the broth is: 0. 0%, glucose 2. 5 %, potassium nitrate 0. 8 %, the balance is water, pH 7.0.
- the yield of phenazine_1-carboxylic acid amide was 182 mg in 65 ml of M18G/pBBRphzH fermentation broth, and the content of phenazine-1-carboxylic acid was zero, diluted in a certain ratio, and the configuration contained 16 per liter.
- Millipum phenazine-1-carboxylic acid amide potato glucose medium (pH 7.0), while diluting M18G/pME6032Phz fermentation broth (ZL200910198664.
- the singularity of about 2. 5 kb is obtained by the same method as in Example 1 and the entire coding region of the gene and the non-coding region of the 5' end. A non-coding region fragment at the 5' end of the gene phzH.
- the recovered / ⁇ z/gene and its 5' non-coding region fragment were digested with restriction endonuclease 3 ⁇ 4o I and Hind III, and inserted into E. coli/Pseudomonas shuttle under the action of ligase.
- the corresponding restriction site in the expression plasmid PBBR1MCS-5 was placed under the control of the phage promoter T3 prom to form a recombinant plasmid pBBRphzH and transformed into E. coli.
- the E. coli transformants transformed with pBBRphzH were screened on gentamicin-resistant plates; finally, recombinant plasmids were extracted from E. coli and verified.
- the engineered strain M18/pBBRphzH constructed by genetic engineering technology was inoculated on a plate of glycerol medium, activated and grown at 30 ° C for 20 hours, and then sterilized on a plate of glycerol medium again, 30 ° C After activation for 12 hours, the activated M18/pBBRphzH strain was transferred to a flask containing 25 ml of glycerol broth in a volume of 250 ml and amplified by shaking at 11 ° C for 11 hours in a shaker at 30 ° C.
- the yield of phenazine-1-carboxylic acid amide under this formula is 300 mg per liter of phenazine-1-carboxylic acid amide, the content of phenazine-1-carboxylic acid is zero, and all phenazine-1-carboxylic acid has been Conversion to phenazine-1-carboxylic acid amide.
- the test results showed that in the M18/pBBRphzH engineering strain, the conversion of phenazine_1-carboxylic acid to phenazine_1-carboxylic acid amide was 100%.
- the singularity of about 2. 5 kb is obtained by the same method as in Example 1 and the entire coding region of the gene and the non-coding region of the 5' end. A non-coding region fragment at the 5' end of the gene phzH.
- the recovered / ⁇ z/gene and its 5' non-coding region fragment were digested with restriction endonuclease 3 ⁇ 4o I and Hind III, and inserted into E. coli/Pseudomonas shuttle under the action of ligase.
- the corresponding cleavage site of the expression plasmid PBBR1MCS-5 was expressed, and the expression of the gene was placed under the control of the phage promoter T3 prom to form a recombinant plasmid pBBRphzH and transformed into Escherichia coli.
- E. coli transformants transformed with PBBRphzH were screened on gentamicin-resistant plates; finally, recombinant plasmids were extracted from E. coli and verified.
- the engineering strain PAO1/pBBRphzH constructed by genetic engineering technology was inoculated on a plate of glycerol medium, activated and grown at 30 ° C for 20 hours, and then sterilized on a plate of glycerol medium again, 30 ° C After activation for 12 hours, the activated PAO1/pBBRphzH strain was transferred to a flask containing 25 ml of glycerol medium in a volume of 250 ml, and shaken for 10 hours in a shaker at 30 ° C for 11 hours.
- the yield of phenazine-1-carboxylic acid amide was 50 mg per liter, and the content of phenazine-1-carboxylic acid was not detected.
- the components of the glycerin medium and the broth culture solution are the same as those in the first embodiment. Under this formula, the yield of phenazine-1-carboxylic acid amide was 50 mg per liter, and the content of phenazine-1-carboxylic acid was not detected.
- a certain amount of M18G/pME6032Phz fermentation broth and M18G/pBBRphzH fermentation broth were added to the potato glucose medium with different acidity values to obtain the final concentration of phenazine_1-carboxylic acid and phenazine diluted to 16 mg/L.
- Potato glucose medium with different acidity values of 1-carboxylic acid amide was poured into a petri dish with a diameter of 9 cm into a plate, and a potato glucose medium plate without a fermentation broth was used as a blank control, and three replicates were set for each treatment.
- PCA indicates phenazine-1-carboxylate Acid
- PCN stands for phenazine-1-carboxylic acid amide.
- PCA phenazine-1-carboxylic acid
- the activities were 95.5%, 82.9%, 67.5%, 15.9%, and 0; the bacteriostatic activities of phenazine-1-carboxylic acid amide (PCN) were 65%, 69%, 73.6%, 80.1%, and 90%, respectively.
- the bacteriostatic activity of phenazine-1-carboxylic acid amide against Rhizoctonia solani is stable compared with phenazine-1-carboxylic acid at a pH of 4 to 8. At the same time, the acidity value is 7.0.
- the bacteriostatic activity of phenazine-1-carboxylic acid amide against Rhizoctonia solani is 5 times that of phenazine-1-carboxylic acid.
- the weight of the component contained in the potato glucose medium The percentages are: 20% potato, 2% glucose, 1.5% agar, and the balance is water.
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CN103704224B (zh) * | 2012-10-08 | 2015-07-22 | 上海农乐生物制品股份有限公司 | 防治植物线虫的申嗪霉素·阿维菌素悬乳剂及其制备方法 |
CN104222098A (zh) * | 2013-06-08 | 2014-12-24 | 江西珀尔农作物工程有限公司 | 一种甲酰胺酚嗪生物杀菌剂的制备方法 |
CN103704274B (zh) * | 2013-06-21 | 2015-05-27 | 湖南农业大学 | 一种铜绿假单胞菌株的应用 |
CN103834585B (zh) * | 2013-10-24 | 2016-02-10 | 上海交通大学 | 高产吩嗪-1-羧酸和吩嗪-1-酰胺的根际假单胞菌 |
CN104017744B (zh) * | 2013-11-07 | 2016-08-17 | 上海交通大学 | 抗病促生的绿针假单胞菌剂的制备方法与用途 |
CN104263748A (zh) * | 2014-07-14 | 2015-01-07 | 武汉汉申生物科技有限责任公司 | 生物工程菌株及其制备方法和用途 |
CN104946552B (zh) * | 2015-02-03 | 2018-02-09 | 上海交通大学 | 安全高效生产申嗪霉素的基因工程菌株及其应用 |
CN107522571A (zh) * | 2017-06-20 | 2017-12-29 | 上海农乐生物制品股份有限公司 | 一种有机功能营养肥及其制备方法 |
CN112111440B (zh) * | 2020-09-25 | 2022-03-04 | 齐鲁工业大学 | 用于生产吩嗪-1-甲酰胺的基因工程菌及其制备方法和用途 |
CN112111441B (zh) * | 2020-09-25 | 2022-02-22 | 齐鲁工业大学 | 一株高产吩嗪-1-甲酰胺的基因工程菌株及其构建方法和应用 |
CN112094795B (zh) * | 2020-09-25 | 2022-02-22 | 齐鲁工业大学 | 一种生产1-羟基吩嗪的绿针假单胞菌qohphz-8及应用 |
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CN104285945B (zh) * | 2014-09-26 | 2016-07-06 | 郑州大学 | 一种申嗪霉素水悬浮剂及其制备方法 |
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