CN114958700A

CN114958700A - Escherichia coli engineering bacterium and application thereof

Info

Publication number: CN114958700A
Application number: CN202210510742.3A
Authority: CN
Inventors: 苏静; 李岩; 王瑞明; 王丽; 王蕾蕾; 徐子淇; 汪俊卿; 刘孟连; 宋子昂
Original assignee: Qilu University of Technology
Current assignee: Qilu University of Technology
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2022-08-30
Also published as: CN113106109A; CN113106109B

Abstract

The invention relates to an escherichia coli engineering bacterium and application thereof, and particularly relates to an escherichia coli gene deletion bacterium BL21 delta FadB, R and J, wherein the escherichia coli gene deletion bacterium is obtained by knocking out a FadB gene, a FadR gene and a FadJ gene from escherichia coli BL21, and the escherichia coli gene deletion bacterium BL21 delta FadB, R and J are used as transformation host bacteria of a recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and a recombinant plasmid pET28a-SUMO-ctYdii to catalyze capric acid to generate trans-2-decenoic acid, so that the specificity is realized.

Description

Escherichia coli engineering bacterium and application thereof

The application is divisional application with application number 202110211118.9, application date 2021.02.25 and invention name 'a mutant enzyme CYP153AM228L and application thereof in synthesizing 10-hydroxy-2-decenoic acid'.

Technical Field

The invention relates to an engineering bacterium of escherichia coli and application thereof, belonging to the technical field of biological fermentation.

Background

10-hydroxy-2-decenoic acid (10-hydroxy-2-decenoic acid, 10-HDA) is a monounsaturated fatty acid containing hydroxyl groups and has a molecular formula of C ₁₀ H ₁₈ O ₃ . So far, it is only found in nature from royal jelly and propolis, so it is also called royal jelly acid. Research shows that the 10-HDA has multiple important physiological functions of resisting bacteria, regulating immunity, resisting oxidation, resisting tumors, reducing blood sugar and the like, has extremely high medical and health-care values and has very wide application prospect. The structure of the compound is as follows:

in view of the wide and important application value of 10-HDA, the research for finding a production method of 10-HDA with high efficiency, convenience and low cost is widely regarded. The existing 10-HDA obtaining method mainly comprises a physical extraction method and a chemical synthesis method. Wherein the physical extraction method is

The source is single, the content of 10-HDA in the royal jelly is only 1.4 to 2.4 percent, so the yield is low, and the market demand cannot be met. The chemical synthesis method can satisfy the industrial demand, but the operation steps are complicated, and the chemical reagents have certain toxicity. Therefore, the method for synthesizing the 10-HDA with high efficiency, convenience and low cost is explored, and has important theoretical and application values for large-scale development and utilization of the HDA. The production of 10-HDA by microbial fermentation synthesis has become a new goal of researchers and the industry in recent years.

Chinese patent document CN109897870A (application number: 201910088897.0) discloses a method for preparing 10-hydroxy-2-decenoic acid by using capric acid as a raw material and utilizing engineering bacteria of escherichia coli, and the patent document utilizes capric acid to generate 10-HDA in one step.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an escherichia coli engineering bacterium and application thereof.

The present application utilizes a two-step method to generate 10-HDA, and the fatty acyl CoA dehydrogenase gene PpFadE, the fatty acyl CoA synthetase gene MaMACS and the acyl CoA thioesterase gene ctydiI utilized by the present application are not the same as the fatty acyl CoA dehydrogenase gene MCAD, the fatty acyl CoA synthetase gene FadK and the acyl CoA thioesterase gene ydiI in Chinese patent document CN109897870A (application number: 201910088897.0), and the alkane hydroxylase CYP153A in the present application changes the amino acid at the 228 position from M to L.

Aiming at the situation that the synthesis way constructed by the existing single engineering bacterium is extremely low in 10-HDA synthesis efficiency and can not reach the industrial level, the invention further optimizes an expression element and the 10-HDA synthesis way on the basis of earlier research, and provides a two-step method for producing and preparing 10-hydroxy-2-decenoic acid by using decanoic acid as a raw material and utilizing escherichia coli engineering bacteria.

The technical scheme of the invention is as follows:

an escherichia coli gene deletion strain BL21 delta FadB, R and J is obtained by knocking out a FadB gene, a FadR gene and a FadJ gene from escherichia coli BL 21.

The delta symbol is a gene knocked out from the genome of the large intestine, FadB is enoyl CoA hydratase, FadR is a protein operon, and FadJ is 3-hydroxyacyl coenzyme A dehydrogenase; the presence of these three enzymes is a hindrance to the two-step method of the present invention to catalyze the production of 10-HDA from capric acid, and therefore was knocked out.

Application of escherichia coli gene deletion bacteria BL21 delta FadB, R and J in preparation of 10-hydroxy-2-decenoic acid.

The construction method of the escherichia coli gene deletion bacterium BL21 delta FadB, R and J comprises the following steps:

knocking out genes by using an RED recombination method, and constructing a gene deletion delta FadRB strain (hereinafter referred to as delta FadR delta FadB strain); the construction method of the strain is disclosed in Chinese patent document CN 110684794A;

II, knocking out genes by using an RED recombination method, and constructing escherichia coli gene deletion bacterium BL21 delta FadB, R and J, wherein the construction specifically comprises a FadJ knock-out frame (the FadJ knock-out frame is abbreviated as Jk in the following); and (3) transforming the FadJ knockout frame into pkd 46-delta FadR delta FadB competent cells to prepare escherichia coli gene deletion bacteria BL21 delta FadB, R and J.

Preferably, the FadR knockout box is constructed in step II, and the method comprises the following steps:

taking a genome of escherichia coli BL21 as a template, amplifying an upstream homologous arm FadJ1 of the 3-hydroxyacyl-CoA dehydrogenase gene, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.25, and the nucleotide sequence of a downstream primer is shown as SEQ ID No. 26; taking a genome of escherichia coli BL21 as a template, amplifying a downstream homology arm FadJ2 of a 3-hydroxyacyl-CoA dehydrogenase gene, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.27, and the nucleotide sequence of a downstream primer is shown as SEQ ID No. 28; taking pkd3 plasmid as a template, amplifying an FRT-RKan-FRT gene fragment, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.29, and the nucleotide sequence of a downstream primer is shown as SEQ ID NO. 30; then, multi-fragment seamless cloning is carried out on FadJl, FRT-RKan-FRT and FadJ2 gene fragments, a knockout frame fragment of FadJ1-Kan-FadJ2 is amplified, the nucleotide sequence of an upstream primer is shown as SEQ ID No.31, the nucleotide sequence of a downstream primer is shown as SEQ ID No.32, and a FadJ knockout frame is obtained by recovering purified glue (the FadJ knockout frame is abbreviated as Jk hereinafter).

Further preferably, the PCR amplification system is as follows, and the total system is 50 μ L:

mu.L of 100 mu M upstream primer 2.0. mu.L, 100 mu.M downstream primer 2.0. mu.L, template 2.0. mu.L, 5U/. mu.L phanta enzyme 25. mu.L, ddH2O 19. mu.L;

the PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 deg.C for 15s, annealing at 60 deg.C for 15s, extension at 72 deg.C for 1min for 15s, and circulating for 30 times; extension at 72 ℃ for 5 min.

Preferably, the FadJ knockout frame is transformed into pkd 46-delta FadR delta FadB recombinant bacteria in the step II to finally obtain

Escherichia coli gene deletion bacterium BL21 delta FadB, R and J, comprising the following steps:

a. transforming the plasmid pkd46 into a delta FadR delta FadB competent cell to obtain a pkd 46-delta FadR delta FadB recombinant strain, preparing a pkd 46-delta FadR delta FadB competent cell, and preserving the prepared pkd 46-delta FadR delta FadB competent cell by using glycerol with the mass concentration of 10%;

b. the FadJ knockout frame Jk is transformed into pkd 46-delta FadR delta FadB competent cells, after the confirmation of the knockout frame transfer of the pkd46-Jk-BL21 recombinant bacteria is verified, pkd46 is eliminated at 42 ℃, and the Jk-delta FadR delta FadB recombinant bacteria are obtained after screening;

c. preparing a competent transformation pcp20 plasmid from the Jk-delta FadR delta FadB recombinant strain, eliminating Jk resistance and the pcp20 plasmid at 42 ℃ to obtain a delta FadRBJ recombinant strain, namely escherichia coli gene deletion strain BL21 delta FadB, R and J.

A method for preparing 10-hydroxy-2-decenoic acid by using capric acid as a raw material and utilizing escherichia coli engineering bacteria resting cells comprises the following steps:

(1) construction of optimized recombinant plasmid pCDFDuet-1-MaMACS-PpFadE, optimized recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 The optimized recombinant plasmid pET28 a-SUMO-ctYdii;

the CYP153A-CPR _BM3 The nucleotide sequence of the expression gene of the fusion enzyme is shown as SEQ ID NO. 13; CYP153AM228L-CPR _BM3 The nucleotide sequence of the expression gene of the fusion enzyme is shown as SEQ ID NO. 14; the nucleotide sequence of the fatty acyl CoA synthetase gene MaMACS is shown as SEQ ID NO. 15; the nucleotide sequence of the fatty acyl CoA dehydrogenase gene PpFadE is shown as SEQ ID NO. 16; the nucleotide sequence of the ester acyl-CoA thioesterase gene ctYdii is shown in SEQ ID NO. 17;

the CYP153A M228L is characterized in that the 228 th amino acid of the CYP153A enzyme is mutated from M to L.

(2) Constructing escherichia coli BL21 delta FadB, R and J, pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii by using escherichia coli knockout strains transformed by the recombinant plasmids pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii prepared in the step (1), and carrying out the recombination of the recombinant plasmids pET21b-CYP153AM228L-CPR _BM3 Transformed into Escherichia coli BL21 to construct Escherichia coli BL21pET21 b-CYP153AM228L-CPR _BM3 Screening and inducing culturing the two engineering bacteria to obtain induced cells;

(3) culturing the induced cells prepared in the step (2) by a transformation culture medium to prepare resting cells, and then adding capric acid into the resting cells of escherichia coli BL21 delta FadB, R, J, pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii to culture to prepare trans-2-decenoic acid; adding Escherichia coli BL21pET21b-CYP153A M228L-CPR into the reaction solution _BM3 The cell is rested and cultured to obtain the 10-hydroxy-2-decenoic acid.

Preferably, in the step (1), the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE is constructed, which comprises the following steps:

taking a genome of escherichia coli DH5a as a template, amplifying a fatty acyl CoA synthetase gene MaMACS, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.7, the nucleotide sequence of a downstream primer is shown as SEQ ID NO.8, then carrying out double enzyme digestion on the pCDFDuet-1 plasmid by using BamH I and Hind III, and connecting by ligase to prepare a recombinant plasmid pCDFDuet-1-MaMACS;

the PCR amplification system was as follows, 25. mu.L total:

mu.M forward primer 1.0. mu.L, 100. mu.M reverse primer 1.0. mu.LL, template 1.0. mu.L, 5U/. mu.L phanta enzyme 12.5. mu.L, ddH ₂ O 9.5μL；

The PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 ℃ for 15s, annealing at 60 ℃ for 15s, extension at 72 ℃ for 50s, and circulation for 30 times; extension at 72 ℃ for 5 min.

Using Escherichia coli DH5a genome as a template, amplifying fatty acyl CoA dehydrogenase gene PpFadE, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.9, the nucleotide sequence of a downstream primer is shown as SEQ ID NO.10, then carrying out double enzyme digestion on pCDFDuet-1-MaMACS plasmid by Nde I and Ava I, and connecting by ligase to prepare a recombinant plasmid pCDFDuet-1-MaMACS-PpFadE;

the PCR amplification system was as follows, 25. mu.L total:

mu.L 100. mu.M forward primer 1.0. mu.L, mu.L 100. mu.M reverse primer 1.0. mu.L, template 1.0. mu.L, 5U/. mu.L phanta enzyme 12.5. mu.L, ddH ₂ O 9.5μL；

The PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 ℃ for 15S, annealing at 60 ℃ for 15S, extension at 72 ℃ for 40S, and circulation for 30 times; extension at 72 ℃ for 5 min.

Preferably, in the step (1), the recombinant plasmid pET28a-SUMO-ctYdii is constructed, and the method comprises the following steps:

using a genome of escherichia coli DH5a as a template, amplifying an ester acyl-CoA thioesterase gene ctyydiI, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.11, the nucleotide sequence of a downstream primer is shown as SEQ ID No.12, then performing double enzyme digestion on pET28a-SUMO plasmid and the ester acyl-CoA thioesterase gene ctyydiI respectively by BamHI and Xho I, and connecting by ligase to prepare a recombinant plasmid pET28 a-SUMO-ctYdii;

the PCR amplification system was as follows, 25. mu.L total:

mu.L 100. mu.M forward primer 1.0. mu.L, mu.L 100. mu.M reverse primer 1.0. mu.L, template 1.0. mu.L, 5U/. mu.L phanta enzyme 12.5. mu.L, ddH ₂ O 9.5μL。

The PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 ℃ for 15s, annealing at 60 ℃ for 15s, extension at 72 ℃ for 15s, and circulation for 30 times; extension at 72 ℃ for 5 min.

Preferably, in the step (2), the transformed engineered Escherichia coli is inoculated into LB liquid medium containing 50. mu.g/mL kanamycin, 100. mu.g/mL ampicillin and 40. mu.g/mL streptomycin at corresponding concentrations, and is subjected to shaking screening culture at 35-40 ℃ until bacterial liquid OD ₆₀₀ 0.8 to 1.2.

Preferably, in the step (2), after the bacteria solution after the screening culture is cooled to 18-20 ℃ and adapted for 0.5-1 hour, IPTG is added to the concentration of 0.5-0.8 mM, oleic acid is added to the concentration of 0.4-0.8% by mass, tween 80 is added to the concentration of 0.2-0.5% by mass, and the induction culture is continued for 18-20 hours, and the cells are separated to prepare the induced cells.

Preferably, in the step (2), the inducing culture conditions include cooling the bacteria solution to 20 ℃ for adaptation for 1 hour, adding IPTG to make the concentration of IPTG in the culture medium 0.5mM, adding oleic acid to make the concentration of tween 80 in the culture medium 0.6% and adding tween 80 to make the concentration of tween 80 in the culture medium 0.3%, continuing inducing culture for 18 hours, and separating cells to obtain the induced cells.

Further preferably, in the step (2), the induction culture conditions are that after the bacterial liquid of the screening culture is cooled to 20 ℃ and adapted for 1 hour, FeCl with the final concentration of 0.5mM is added ₃ And 5-ALA with the final concentration of 0.5mM is continuously induced and cultured for 18 hours, and the cells are separated to prepare the induced cells.

Further preferably, in the step (2), the cells are separated by centrifuging at 5000rpm for 15min, collecting the precipitate, and then washing with 0.85% by mass of saline.

Preferably, the transformation medium in step (3) comprises the following components:

0.8-1.2% of glycerol by mass fraction, 0.3-0.5% of glucose by mass fraction, 40-60 mu g/mL of kanamycin antibiotic, 90-110 mu g/mL of ampicillin, 30-50 mu g/mL of streptomycin antibiotic and the balance of 100mM potassium phosphate buffer solution with pH7.4 as a solvent.

Further preferably, glycerol is 1% by mass, glucose is 0.4% by mass, kanamycin antibiotic is 50. mu.g/mL, ampicillin is 100. mu.g/mL, streptomycin antibiotic is 40. mu.g/mL, and the balance is 100mM potassium phosphate buffer pH 7.4.

Preferably, capric acid is added into the resting cells in the step (3) to the concentration of 0.3-0.7g/L, and the reaction is carried out for 7-10h at the temperature of 28-37 ℃ to prepare trans-2-decenoic acid; adding Escherichia coli BL21pET21 b-CYP153AM228L-CPR into the reaction solution _BM3 Resting the cells, reacting for 10-24h at 28-37 ℃ to obtain the 10-hydroxy-2-decenoic acid.

Further preferably, in the step (3), the concentration of converted decanoic acid is 0.5 g/L.

More preferably, capric acid is added into the resting cells in the step (3) to the concentration of 0.5g/L, and the reaction is carried out for 9h at the temperature of 30 ℃ to prepare trans-2-decenoic acid; adding Escherichia coli BL21pET21b-CYP153A M228L-CPR into the reaction solution _BM3 Resting the cells, reacting for 20h at the temperature of 30 ℃ to obtain the 10-hydroxy-2-decenoic acid.

According to the invention, in the step (3), the transformation culture condition is culture at 29-31 ℃ for 8 hours.

Preferably, according to the present invention, in the step (3), the decanoic acid is dissolved in the dimethyl sulfoxide.

Advantageous effects

1. The invention constructs recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and recombinant plasmid pET21b-CYP153AM228L-CPR _BM3 The recombinant plasmid pET28a-SUMO-ctYdii realizes the high-efficiency expression of a 10-hydroxy-2-decenoic acid expression element, and after special induction treatment, trans-2-decenoic acid is produced by fermenting decanoic acid serving as a raw material by using engineering bacteria escherichia coli BL21 delta FadB, R, J, pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii resting cells, and then engineering bacteria escherichia coli BL21pET21b-CYP153A M228L-CPR _BM3 The resting cells continue to react to finally obtain the 10-hydroxy-2-decenoic acid produced by fermenting the decanoic acid serving as the raw material, so that 0.5g/L decanoic acid is fermented in a shake flask to produce 0.273 g/L10-hydroxy-2-decenoic acid in the process of producing the high value-added 10-hydroxy-2-decenoic acid by using the low-value decanoic acid through a two-step method, and the conversion rate is54.6％。

2. The invention obviously improves the conversion rate of the 10-hydroxy-2-decenoic acid by optimizing the expression way of the 10-hydroxy-2-decenoic acid, optimizing each expression element in the way and relevant conditions in the conversion process, thereby enabling the industrial production of the 10-hydroxy-2-decenoic acid to be possible.

Drawings

FIG. 1 is a schematic diagram of a recombinant plasmid structure;

in the figure: a is recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 B is recombinant plasmid pCDFDuet-1-MaMACS-PpFadE, and C is recombinant plasmid pET28 a-SUMO-ctYdii.

FIG. 2 shows PCR amplification of CYP153A and CPR _BM3 Agarose gel electrophoresis of the gene product;

in the figure, M is marker, the first row is CYP153A gene, the second row is CPR _BM3 A gene.

FIG. 3 shows PCR amplified recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 Agarose gel electrophoresis of the target gene band of (1);

in the figure, M is marker, and 1-4 in the figure are all recombinant plasmids pET21b-CYP153A M228L-CPR _BM3 A linearized band.

FIG. 4 is an agarose gel electrophoresis picture of a CTYdii product amplified by PCR;

in the figure, M is marker, and 1-5 are bands of the ctydiI gene.

FIG. 5 shows a plasmid map of Nde I, Xho I double digestion plasmid pET21 b;

in the figure, lane M is Marker; lanes 1-6 show the cleavage results.

FIG. 6 is the gel electrophoresis diagram of pET28a-SUMO, ctYdii double-enzyme digestion lipid sugar;

the first glue picture is pET28a-SUMO double enzyme cutting gene sequence, and 1-3 in the picture are strips obtained by pET28a-SUMO double enzyme cutting; the second gel diagram is a gene band of the ctydi double enzyme digestion, and 1-3 in the diagram are bands obtained after the ctydi double enzyme digestion.

FIG. 7 is a SDS-PAGE protein gel map;

the first glue is BL21 delta FadB, R and J, and the expression conditions of pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii proteins are shown, wherein MaMACS is 59KD, PpFadE is 45KD and ctYdii is 27 KD; the second piece of glue is the protein expression condition of escherichia coli BL21pET21b-CYP153A M228L-CPRBM3, and the CYP153A M228L-CPRBM3 protein is 117 KD.

FIG. 8 is a chromatogram of 10-hydroxy-2-decenoic acid produced by decanoic acid;

in the figure, the retention time 8.395min is phosphoric acid trimethylsilanol, the retention time 10.426min is trans-2-decenoic acid TMS derivative, the retention time 11.564min is lauric acid TMS derivative, the retention time 12.744min is 10-hydroxydecanoic acid TMS derivative, the retention time 13.092min is 10-hydroxy-2 decenoic acid TMS derivative, the retention time 14.292min is palmitic acid TMS derivative, the retention time 15.564min is (Z) -oleic acid TMS derivative, and the TMS is trimethylsilane.

FIG. 9 is a mass spectrum of intermediate trans-2-decenoic acid.

FIG. 10 is the mass spectrum of the final product 10-hydroxy-2-decenoic acid.

FIG. 11 is an agarose gel electrophoresis image of a colony PCR validated Δ FadR Δ FadB knockout FadJ product;

in the figure, lane M is Marker; lanes 1-2 are the FadJ gene bands, and lanes 3-8 are the FadJ knockout frame fusion fragment gene bands.

Detailed Description

The present invention will be further illustrated with reference to the following examples, but the scope of the present invention is not limited thereto. The procedures not described in detail in the examples are all conventional procedures known to those skilled in the art.

The reagents and medicines used in the invention are all common commercial products.

Example 1

Fusion enzyme gene of alkane hydroxylase CYP153A of sea Bacillus (Marinobacter aquaeolei) and Bacillus megaterium P450NADH reductase, i.e. CYP153A-CPR _BM3 Fusion enzyme gene, CYP153AM228L-CPR _BM3 PCR amplification of fusion enzyme gene, fatty acyl CoA dehydrogenase gene PpFadE, fatty acyl CoA synthetase gene MaMACS, ester acyl CoA thioesterase gene ctydiI.

Alkane hydroxylase CYP153A and Bacillus megaterium (Marinobacter aquaeolei)Bacillus megaterium) P450NADH reductase fusion gene, i.e., CYP153A gene, CPR _BM3 Gene, CYP153AM228L-CPR _BM3 Designing PCR amplification primers for a fusion enzyme gene, a fatty acyl CoA dehydrogenase gene PpFadE, a fatty acyl CoA synthetase gene MaMACS and a fatty acyl CoA thioesterase gene ctyydiI, wherein the nucleotide sequences of an upstream primer are respectively shown as SEQ ID No.1, 3, 5, 7, 9 and 11, and the nucleotide sequence of a downstream primer is shown as SEQ ID No.2, 4, 6, 8, 10 and 12;

wherein, the nucleotide sequences of the alkane hydroxylase CYP153A of the sea Bacillus (Marinobacter aquaeolei) and the fusion enzyme gene of the Bacillus megaterium P450NADH reductase, namely CYP153A-CPRBM3, CYP153AM228L-CPRBM3 fusion enzyme gene, fatty acyl CoA dehydrogenase gene PpFadE, fatty acyl CoA synthetase gene PpFadE and ester acyl CoA thioesterase gene ctYdii are respectively shown as SEQ ID NO.13, 14, 15, 16 and 17, the correspondingly expressed amino acid sequences are shown as SEQ ID NO.18, 19, 20, 21 and 22, the nucleotide sequence of CYP153A M228L is shown as SEQ ID NO.23, and the amino acid sequence of CYP153A M228L is shown as SEQ ID NO. 24.

The recombinant plasmid pET21b-CYP153A-CPR is constructed _BM3 The method comprises the following steps:

performing PCR amplification by using a fusion enzyme gene of alkane hydroxylase CYP153A of mycobacterium marinum (Marinobacter aquaeolei) and Bacillus megaterium (Bacillus megaterium) P450NADH reductase as a template, wherein the nucleotide sequence of an upstream primer of CYP153A is shown as SEQ ID No.1, the nucleotide sequence of a downstream primer is shown as SEQ ID No.2, and CPR (CPR) is performed by using a fusion enzyme gene of alkane hydroxylase CYP153A and Bacillus megaterium) P450NADH reductase of the mycobacterium marinum optimized by codon as a template _BM3 The nucleotide sequence of the upstream primer is shown as SEQ ID NO.3, the nucleotide sequence of the downstream primer is shown as SEQ ID NO.4, then the pET21b plasmid is subjected to double enzyme digestion by Nde I and Xho I, and is connected by a multi-fragment seamless cloning kit to prepare the recombinant plasmid pET21b-CYP153A-CPR _BM3 ；

The PCR amplification system was as follows, 25. mu.L total:

mu.L 100. mu.M forward primer 1.0. mu.L, mu.L 100. mu.M reverse primer 1.0. mu.L, template 1.0. mu.L, 5U/. mu.L phanta enzyme (a high fidelity enzyme) 12.5. mu.L, ddH ₂ O 9.5μL；

The PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 ℃ for 15s, annealing at 60 ℃ for 15s, and elongation at 72 ℃ for CYP153A 45s, CPR _BM3 55s, circulating for 30 times; extension at 72 ℃ for 5 min.

And (3) recovering a PCR product:

after the PCR amplification, the length of the fragment was analyzed by 1% agarose gel electrophoresis, and the result is shown in FIG. 2, where the target band was cut out according to the size of the fragment, and the PCR product was recovered using a DNA gel recovery kit from Shanghai Bioengineering Ltd.

The recombinant plasmid pET21b-CYP153A M228L-CPR is constructed _BM3 The method comprises the following steps:

the constructed pET21b-CYP153A-CPR _BM3 Performing PCR amplification by using the fusion enzyme gene as a template, and performing CYP153AM228L-CPR _BM3 The nucleotide sequence of the upstream primer is shown as SEQ ID NO.5, and the nucleotide sequence of the downstream primer is shown as SEQ ID NO. 6; then, after removing the original template by using Dpn I enzyme, transforming the template into a competent cell Escherichia coli BL21 to cyclize the competent cell Escherichia coli BL21 to obtain a recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 。

The PCR amplification system was as follows, 25. mu.L total:

The PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 ℃ for 15s, annealing at 60 ℃ for 15s, extension at 72 ℃ for 100s, and circulation for 30 times; extension at 72 ℃ for 5 min.

And (3) recovering a PCR product:

after completion of PCR amplification, the length of the fragment was analyzed by 1% agarose gel electrophoresis, and as a result, pET21b-CYP153A M228L-CPR was obtained as shown in FIG. 3 _BM3 The plasmid of (1) is shown in FIG. 1A, and the PCR product is recovered by using a DNA gel recovery kit of Shanghai Bioengineering Co., Ltd, according to the size of the fragment cut out the band.

DpnI enzyme digestion template

DpnI digestion system:

PCR product 44. mu.L

DpnI 1μL

10X QuickCut Buffer 5μL

Reaction conditions are as follows: react for 2h at 37 ℃.

DpnI was inactivated at 70 ℃ for 15min after the reaction was complete.

The construction of recombinant plasmid pCDFDuet-1-MaMACS, comprising the steps of:

taking a genome of escherichia coli DH5a as a template, amplifying a fatty acyl CoA synthetase gene MaMACS, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.7, the nucleotide sequence of a downstream primer is shown as SEQ ID NO.8, then carrying out double enzyme digestion on pCDFDuet-1 plasmid by Hind III and BamH I, and connecting by ligase to prepare a recombinant plasmid pCDFDuet-1-MaMACS;

the PCR amplification system was as follows, 25. mu.L total:

The PCR amplification conditions were as follows:

And (3) recovering a PCR product:

after the PCR amplification is finished, the length of the fragment is analyzed through 1% agarose gel electrophoresis, a target band is cut according to the size of the fragment, and a PCR product is recovered by using a DNA gel recovery kit of Shanghai biological engineering Co.

The construction of recombinant plasmid pCDFDuet-1-MaMACS-PpFadE includes the following steps:

the PCR amplification system was as follows, 25. mu.L total:

The PCR amplification conditions were as follows:

And (3) recovering a PCR product:

The construction of the recombinant plasmid pET28a-SUMO-ctYdii comprises the following steps:

amplifying an ester acyl-CoA thioesterase gene ctydiI, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.11, the nucleotide sequence of a downstream primer is shown as SEQ ID No.12, then carrying out double enzyme digestion on pET28a-SUMO plasmid and the ester acyl-CoA thioesterase gene ctydiI respectively by using BamH I and Xho I, and carrying out ligase ligation to prepare a recombinant plasmid pET28 a-SUMO-ctYdii;

the PCR amplification system was as follows, 25. mu.L total:

The PCR amplification conditions were as follows:

And (3) recovering a PCR product:

after the PCR amplification, the length of the fragment was analyzed by 1% agarose gel electrophoresis, and the result is shown in FIG. 4, where the target band was cut out according to the size of the fragment, and the PCR product was recovered using a DNA gel recovery kit from Shanghai Bioengineering Ltd.

Example 2

Digestion of recombinant plasmid vectors pET21b, pCDFDuet-1-MaMACS, pET28a-SUMO and gene ctYdii

Extracting pET21b plasmid and carrying out double enzyme digestion reaction, wherein the reaction system is as follows:

reaction conditions are as follows: react for 6h at 37 ℃.

The pET21b plasmid vector was purified from FIG. 5 by 1% agarose gel electrophoresis after double digestion, and the desired fragment was recovered using a DNA gel recovery kit.

The pCDFDuet-1 plasmid is extracted and subjected to double digestion reaction, and the reaction system is as follows:

the reaction conditions are as follows: react for 6h at 37 ℃.

The pCDFDuet-1 plasmid vector was purified by 1% agarose gel electrophoresis after double digestion and the target fragment was recovered using a DNA gel recovery kit.

Extracting pCDFDuet-1-MaMACS plasmid and carrying out double enzyme digestion reaction on the plasmid, wherein the reaction system is as follows:

reaction conditions are as follows: react for 6h at 37 ℃.

The pCDFDuet-1-MaMACS plasmid vector was purified by 1% agarose gel electrophoresis after double digestion and the target fragment was recovered using a DNA gel recovery kit.

Extracting pET28a-SUMO plasmid and ester acyl CoA thioesterase ctYdii PCR product to carry out double enzyme digestion reaction, wherein the reaction system is as follows:

reaction conditions are as follows: react for 6h at 37 ℃.

The pET28a-SUMO plasmid and the ester acyl CoA thioesterase ctYdii PCR product are subjected to double digestion, then the product is subjected to 1% agarose gel electrophoresis to purify the figure 6, and a DNA gel recovery kit is used for recovering the target fragment.

Example 3

Recombinant plasmid pET21b-CYP153A-CPR _BM3 Multi-fragment seamless cloning and recombinant plasmid pET28a-SUMO-ctYdii connection

The plasmid pET21b which is subjected to double enzyme digestion is mixed with CYP153A and CPR _BM3 And connecting PCR products, wherein a connection reaction system is as follows:

the ligation reaction system is fully and uniformly mixed and then centrifuged for a plurality of seconds, the liquid drops on the tube wall are collected at the tube bottom, and the tube bottom is connected for 30min at 37 ℃ to obtain the recombinant plasmid pET21b-CYP153A-CPR _BM3 。

The digested pCDFDuet-1 plasmid is connected with the MaMACS PCR product, and the connection reaction system is as follows:

and (3) fully and uniformly mixing the ligation reaction system, centrifuging for several seconds, dripping the tube wall liquid to the tube bottom, and reacting for 37min at 37 ℃ to obtain the recombinant plasmid pCDFDuet-1-MaMACS.

The digested pCDFDuet-1-MaMACS plasmid was ligated to PpFadE PCR product in the following reaction:

the ligation reaction system is fully and evenly mixed and then centrifuged for a plurality of seconds, the tube wall is dripped to the tube bottom, and the reaction is carried out for 37min at 37 ℃, thus obtaining the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE shown in figure 1B.

The double digested pET28a-SUMO plasmid was ligated to the ctYdii PCR product in the following reaction system:

and (3) fully and uniformly mixing the ligation reaction system, centrifuging for several seconds, dripping the tube wall liquid to the tube bottom, and ligating at 22 ℃ for 2 hours to obtain a recombinant plasmid pET28a-SUMO-ctYdii shown in a figure C of fig. 1.

Example 4

Recombinant plasmid pET21b-CYP153A-CPR _BM3 The recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 And the transformation of the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and the recombinant plasmid pET28 a-SUMO-ctYdii:

(1) preparation of competent cells

Picking single colony (or picking and storing strain) of escherichia coli BL21(DE3) to inoculate into 10ml of liquid LB culture medium, and culturing overnight at 37 ℃ and 210 rpm;

② inoculating 5ml of bacterial liquid into 500ml of LB culture medium, culturing at 37 ℃ and 210rpm until the bacterial liquid OD ₆₀₀ About 0.375;

thirdly, placing the bacterial liquid on the ice-water mixture for 10min, and precooling a 50ml centrifuge tube at the same time;

transferring the bacterial liquid into a centrifuge tube, centrifuging at 4 ℃ and 3700rpm for 10min, and collecting thalli;

fifthly, adding 10mL of precooled 0.1M CaCl into each centrifuge tube ₂ Resuspending the cells in the solution, and adding 30mL of precooled 0.1M CaCl ₂ The solution is reversed and mixed evenly, and is kept stand for 20min on ice;

sixthly, centrifuging at 4 ℃ and 3700rpm for 10min, and collecting thalli, wherein the volume ratio of the thalli to the bacterial liquid in the step (iv) is 3: 125 with a pre-cooled 0.1M CaCl containing 15% glycerol ₂ Suspending the thallus in solution to obtain competent cell;

seventhly, subpackaging the competent cells and freezing and storing at the temperature of minus 80 ℃.

Competent cells of E.coli gene-deficient strain BL21(Δ FadB, R, J) were prepared in the same manner.

knocking out genes by using an RED recombination method, and constructing a gene deletion delta FadRB strain, which is called as delta FadR delta FadB strain below; the construction method of the strain is disclosed in Chinese patent document CN110684794A (application No. 201911038194.3).

II, constructing a FadJ knockout frame, and specifically comprising the following steps:

taking a genome of escherichia coli BL21 as a template, amplifying an upstream homologous arm FadJ1 of the 3-hydroxyacyl-CoA dehydrogenase gene, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.25, and the nucleotide sequence of a downstream primer is shown as SEQ ID No. 26; taking a genome of escherichia coli BL21 as a template, amplifying a downstream homologous arm FadJ2 of the 3-hydroxyacyl-CoA dehydrogenase gene, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.27, and the nucleotide sequence of a downstream primer is shown as SEQ ID No. 28; amplifying an FRT-RKan-FRT gene fragment by taking pkd3 plasmid as a template, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.29, and the nucleotide sequence of a downstream primer is shown as SEQ ID NO. 30; then, carrying out multi-fragment seamless cloning on FadJl, FRT-RKan-FRT and FadJ2 gene fragments, amplifying a knockout frame fragment of FadJ1-Kan-FadJ2, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.31, the nucleotide sequence of a downstream primer is shown as SEQ ID No.32, and recovering purified glue to obtain a FadJ knockout frame (the FadJ knockout frame is abbreviated as Jk in the following);

the PCR amplification system was as follows, with a total of 50. mu.L:

the PCR amplification conditions were as follows:

III, transforming the FadJ knockout frame prepared in the step II into pkd 46-delta FadR delta FadB recombinant bacteria to finally obtain escherichia coli gene deletion bacteria BL21 delta FadB, R and J, and the specific steps are as follows:

c. preparing the Jk-delta FadR delta FadB recombinant bacteria into competent transformation pcp20 plasmid, eliminating Jk resistance and pcp20 plasmid at 42 ℃ to obtain delta FadRBJ recombinant bacteria, namely escherichia coli gene deletion bacteria BL21 delta FadB, R and J.

FIG. 11 is an agarose gel electrophoresis of a colony PCR validated Δ FadR Δ FadB knockdown FadJ product;

(2) Transformation of recombinant plasmids

10 microliter of recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 Adding into 100 μ L freshly prepared competent cells of Escherichia coli BL21, mixing gently, and ice-cooling for 30 min; 10 uL of recombinant plasmid pET21b-CYP153A-CPR _BM3 Adding into 100 μ L freshly prepared competent cells of Escherichia coli BL21, mixing gently, and ice-cooling for 30 min; mu.L of the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and the recombinant plasmid pET28a-SUMO-ctYdii were simultaneously added to 100. mu.L of competent cells of freshly prepared E.coli gene-deleted bacteria BL 21. delta. FadB, R and J.

② heat-shocking at 42 ℃ for 90s, then rapidly placing in an ice bath for cooling for 3 min;

thirdly, inoculating the competent cells into 500 mu L LB culture medium, and performing shaking culture at 37 ℃ and 200rpm for 60 min;

fourthly, 200 mu L of the bacterial liquid is taken and coated on LB solid culture medium with 100mg/mL, 50mg/mL, 40mg/mL ampicillin, kanamycin and streptomycin;

fifthly, the incubator is upright for 30min at 37 ℃, and the plate is inverted to be cultivated for 12-16h at 37 ℃ after the bacterial liquid is sucked dry.

(3) Identification of positive clones:

expression of protein and identification of solubility

Taking 900 mu L of the bacterial liquid, adding IPTG with the final concentration of 0.32mM, inducing expression for 4h, centrifuging at 12000rpm for 1min, collecting thalli, adding 2 times of loading buffer solution, re-suspending the thalli, carrying out water bath denaturation at 100 ℃ for 10min, detecting protein expression by SDS-PAGE, and displaying the result as positive clone as shown in figure 7.

② sequencing of the bacterial sample

The positive clones identified by the two methods are sent to a sequencing company for sequencing, the correctness of the constructed positive clones is further proved, and escherichia coli BL21 delta FadB, R and J, pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii are obtained; escherichia coli BL21pET21b-CYP153A M228L-CPR _BM3 (ii) a Escherichia coli BL21pET21b-CYP153A-CPR _BM3 ；

Example 5

Coli BL21 Δ FadB, R, J, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii and E.coli BL21pET21b-CYP153A M228L-CPR _BM3 Fermentation of fusion enzyme engineering bacteria

(1) Activating strains: escherichia coli BL 21. delta. FadB, R, J, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii in example 4 were inoculated in 50mL of liquid LB medium containing kanamycin and streptomycin at an inoculum size of 1%, and cultured with shaking at 200rpm at 37 ℃ for 12 hours;

(2) transferring thalli: taking 3mL of the activated strain, inoculating the activated strain into 300mL of liquid culture medium containing kanamycin and streptomycin, carrying out shaking culture at 37 ℃ and 200rpm until the OD600 of the bacterial liquid is 1.0, cooling to 20 ℃ to adapt for 1 hour, adding IPTG (isopropyl-beta-thiogalactoside) to ensure that the concentration of IPTG in the culture medium is 0.5mM, adding oleic acid to ensure that the concentration of oleic acid in the culture medium is 0.6 percent by mass, adding Tween 80 to ensure that the concentration of Tween 80 in the culture medium is 0.3 percent by mass, and carrying out overnight induction culture;

(3) and (3) collecting thalli: taking 300mL of the bacterial liquid, centrifuging at 5000rpm and 4 ℃ for 15min, and collecting thalli;

(4) the pellet was washed three times with 0.85% physiological saline, and bacterial suspension was prepared by resuspending the cells in transformation medium. The transformation medium contained 100mM potassium phosphate buffer (pH7.4), glycerol at a mass concentration of 1%, glucose at a mass concentration of 0.4%, kanamycin antibiotic at 50. mu.g/mL, streptomycin at 40. mu.g/mL in a total volume of 30mL, and 0.5g/L of capric acid was added to each of them to carry out the reaction. The reaction was carried out at 30 ℃ for 20h and samples were taken at 9 h.

Escherichia coli BL21pET21b-CYP153A M228L-CPR _BM3 Fermentation of fusion enzyme engineering bacteria

(1) Activating strains: coli BL21pET21b-CYP153A M228L-CPR in example 4 _BM3 Inoculating to 50mL of liquid LB medium containing ampicillin at an inoculum size of 1%, and culturing at 37 deg.C under shaking at 200rpm for 12 h;

(2) transferring thalli: inoculating 3mL of the activated strain into 300mL of liquid culture medium containing ampicillin, performing shake culture at 37 deg.C and 200rpm until OD600 of the bacterial solution is 1.0, cooling to 20 deg.C for adaptation for 1 hr, adding IPTG to make IPTG concentration in the culture medium 0.5mM, and adding FeCl to make final concentration 0.5mM ₃ Continuously carrying out induction culture on the 5-ALA (5-aminolevulinic acid hydrochloride) with the final concentration of 0.5mM for 18 hours, and separating cells to prepare induced cells;

(4) the pellet was washed three times with 0.85% physiological saline, and the bacterial suspension was prepared by resuspending the cells in a transformation medium. The transformation medium contained 100mM potassium phosphate buffer (pH7.4), the volume of the cell after resuspension was 3mL, and the cell was added to the reaction system in which the previous reaction was completed, and the reaction was carried out at 30 ℃ for 20 hours and then sampled. After the reaction was terminated, 1mL of 0.4mol/L HCl was added to terminate the reaction, and 0.1g/L lauric acid was added as an internal standard.

Silanization treatment of fermentation liquor: 1mL of the fermentation broth was placed in a 1.5mL centrifuge tube, 1.5mL of ethyl acetate was used per sample to extract the fatty acids (750. mu.L each) from the sample solution, mixed in a vortex mixer for 60s, and centrifuged at 4000r/m for 10min at room temperature. The extract was evaporated to dryness, and the dried sample was redissolved in 0.5mL ethyl acetate (chromatographically pure) and 0.5mL n-hexane (chromatographically pure), 100. mu.L BSTFA-TMCS (99:1, v/v) derivatization reagent was added, and then left at room temperature for 5min, and incubated in an oven at 70 ℃ for 50 min.

Gas mass spectrum detection to generate a product: the gas chromatography takes helium as carrier gas, the constant flow mode is adopted, the sample injection volume is 1 mu L, the split flow sample injection is carried out, the split flow ratio is 1: 5, the sample injection temperature is 250 ℃, the temperature is kept at 50 ℃ for 1min, the temperature is increased to 250 ℃ at 15 ℃/min, and the temperature is kept for 10 min. The product chromatograms are shown in fig. 8, 9 and 10.

By the chromatogram and mass spectrogram calculation and analysis of the product, 0.5g/L of capric acid is obtained by shake flask fermentation in the process of producing 10-hydroxy-2-decenoic acid with high added value by capric acid through two-step method to generate 0.273g/L of 10-hydroxy-2-decenoic acid, and the conversion rate is 54.6 percent

Comparative example 1

The difference from the fermentation of the recombinant bacteria in example 5 is that the Escherichia coli BL21pET21b-CYP153A-CPR obtained in example 4 is used _BM3 Instead of Escherichia coli BL21pET21b-CYP153A M228L-CPR _BM3 The other steps are the same, and the experimental result shows that 0.5g/L decanoic acid produces 0.077 g/L10-hydroxy-2-decenoic acid through shaking flask fermentation, and the conversion rate is 15.4 percent

Comparative example 2

Recombinant plasmid pET21b-CYP153A M228L-CPR _BM3 The difference between the transformation of the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and the recombinant plasmid pET28a-SUMO-ctYdii and the transformation of the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and the recombinant plasmid pET28a-SUMO-ctYdii in the embodiment 4 is that a competent cell of the Escherichia coli gene deletion bacterium BL21 (delta FadB, R) is prepared in the same way, and the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE and the recombinant plasmid pET28a-SUMO-ctYdii are transformed into a competent cell of the freshly prepared Escherichia coli gene deletion bacterium BL21 delta FadB, R to obtain Escherichia coli BL21 delta FadB, R, pCDFDuet-1-MaMACS-PpFadE and pET28 a-SUMO-ctYdii; the others are the same.

The obtained Escherichia coli BL21 Δ FadB, R, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii and Escherichia coli BL21pET21b-CYP153A M228L-CPR _BM3 The fermentation method of the fusion enzyme engineering bacteria is the same as that of the example 5, and the experimental result shows that the escherichia coli BL21 delta FadB, R, pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii can not catalyze decanoic acid to produce trans-2-decenoic acid, so that 10-hydroxy-2 decenoic acid can not be produced.

According to the experiment, 10-HDA is generated by using capric acid as a substrate and utilizing two-step biological cascade catalysis, 10-HAD is synthesized in one step by using capric acid as a substrate in a previous laboratory, a synthesis path constructed by optimally obtained fatty acyl CoA dehydrogenase genes PpFadE, fatty acyl CoA synthetase genes MaMACS and acyl CoA thioesterase genes ctydiI is not the same as that constructed by fatty acyl CoA dehydrogenase genes MCAD, fatty acyl CoA synthetase genes FadK and acyl CoA thioesterase genes ydiI in patent document CN109897870A, P450 fusion enzyme in the experiment changes 228-site amino acid from M to L, and the yield of 10-HDA can be remarkably improved by replacing a catalytic element and changing a biosynthesis mode.

From the experimental results of example 5 and comparative example 2, it can be seen that the transformed host bacteria of the present invention using E.coli gene-deleted bacteria BL21 Δ FadB, R and J as recombinant plasmids pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii can catalyze the production of trans-2-decenoic acid by decanoic acid, and have specificity to E.coli BL21pET21 b-CYP153AM228L-CPR _BM3 The 10-hydroxy-2-decenoic acid is synthesized by combining the fusion enzyme engineering bacteria with a two-step method, and the final conversion rate of the 10-hydroxy-2-decenoic acid is 54.6 percent and is obviously superior to the effect of taking Escherichia coli gene deletion bacteria BL21 delta FadB and R as host bacteria.

SEQUENCE LISTING

<110> university of Qilu Industrial science

<120> escherichia coli engineering bacterium and application

<160> 32

<170> PatentIn version 3.5

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aaaacctttg gtccacgtcg cccaatgccg gaatttgtgg aaacacctat cccggatgtt 180

aatacattag ccttagagga cattgatgtg agtaatccgt ttctgtatcg ccagggccag 240

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ccgaatatgg tgagcgaaat tattcgttgg cagacaccac tggcctatat gcgccgcatt 1080

gccaaacagg atgttgaact gggcggtcag accatcaaaa aaggtgatcg cgttgttatg 1140

tggtatgcct caggtaatcg cgatgaacgt aaatttgata atccggatca gtttattatc 1200

gatcgtaaag atgcacgcaa tcacatgtct tttggctatg gtgttcatcg ctgtatgggt 1260

aatcgtctgg ccgaattaca gctgcgtatt ctgtgggaag aaatcttaaa acgctttgat 1320

aatatcgaag ttgtggaaga accagaacgt gtgcagagca attttgttcg cggctatagc 1380

cgcttaatgg ttaaactgac acctaatagt atgggcggca ttccttcacc aagccgagag 1440

cagtcagcta aaaaagagcg caaaaccgta gaaaacgctc ataatacgcc gcttcttgtg 1500

ctatacggtt caaatatggg aacagccgaa ggaacggcgc gtgatttagc ggatattgcg 1560

atgagcaaag gattcgcacc gcaagtcgca acgcttgatt cccacgcagg aaaccttccg 1620

cgtgaaggag ctgttttaat tgtaacggct tcttataacg gtcatcctcc tgataacgca 1680

aaggaatttg ttgactggtt agaccaagcg tctgctgatg aagtaaaagg cgtgcgctac 1740

tccgtatttg gatgcggtga taaaaactgg gcgacaacgt atcaaaaagt gcctgctttt 1800

attgatgaaa ctcttgccgc taaaggggca gaaaacatag ctgaacgcgg tgaagcagat 1860

gcaagcgacg actttgaagg cacatacgaa gaatggcgtg aacacatgtg gagtgactta 1920

gcagcctact ttaacttaga cattgaaaac agcgaagaaa atgcgtctac gctttcactt 1980

caatttgtcg acagcgctgc ggacatgccg cttgcgaaaa tgcaccgtgc gttttcagca 2040

aacgtcgtag caagcaaaga gcttcaaaag ccaggcagtg cacgaagcac gcgtcatctt 2100

gaaattgaac ttccaaaaga agcttcttat caagaaggag atcatttagg tgttattcct 2160

cgcaactatg aaggaatagt aaatcgtgta gcaacaagat ttggtctaga tgcatcacag 2220

caaatccgtt tggaagctga agaagaaaaa ttagctcatt tgccactcgg taaaacagta 2280

tcagtagaag agcttctgca atacgtggag cttcaagatc ctgttacgcg cacgcagctt 2340

cgcgcaatgg ctgctaaaac agtctgcccg ccgcataaag tagagcttga agtcttgctt 2400

gaaaagcagg cgtacaaaga acaagtgctg gcaaaacgtt taacaatgct tgaactgctt 2460

gaaaaatatc cggcgtgtga aatggaattc agcgaattta tcgcacttct tccaagcatg 2520

cgtccgcgct attactcaat ttcttcatca cctcgtgtcg atgaaaaaca agcaagcatc 2580

acggtcagcg ttgtttcagg agaagcgtgg agcggatacg gagaatacaa aggaattgca 2640

tcgaactatc ttgccaatct gcaagaagga gatacgatta cgtgctttgt ttccacaccg 2700

cagtcaggat ttacgctgcc aaaaggccct gaaacaccac ttatcatggt aggaccggga 2760

acaggcgtcg cgccgtttag aggctttgtg caggctcgca agcagttaaa agaacaagga 2820

cagtcgcttg gagaagcgca tttatacttt ggctgccgtt cacctcatga agattatctg 2880

tatcaaaaag agcttgaaaa cgcccaaaat gaaggcatca ttacgcttca taccgctttt 2940

tctcgcgtac caaatcagcc gaaaacatac gttcaacacg tgatggaaca agacggcaag 3000

aaattgattg aacttcttga ccaaggagcg cacttctata tttgcggaga cggaagccaa 3060

atggcacctg acgttgaagc aacgcttatg aaaagctatg ctgaagttca ccaagtgagt 3120

gaagcagacg ctcgcttatg gctgcagcag ctagaagaaa agggccgata cgcaaaagac 3180

gtgtgggctg ggtaa 3195

<210> 15

<211> 1653

<212> DNA

<213> Artificial sequence

<400> 15

atgtcagata ccaccaccgc atttaccgtt ccagcggttg ccaaagcagt tgccgcagcc 60

attccggatc gcgaactgat tattcagggt gatcgtcgct atacctatcg tcaggttatt 120

gaacgctcaa atagattagc tgcatattta cattcacagg gcttaggctg tcataccgaa 180

cgcgaagcct tagcaggtca tgaagttggc caggatctgc tgggcctgta tgcatataat 240

ggcaatgaat ttgtggaagc cttactgggt gcctttgcag ctagggtggc cccgtttaat 300

gtgaattttc gctatgttaa atcagaatta cattatctgt tagccgatag tgaagcaacc 360

gccctgattt atcatgcagc ctttgccccg cgtgtggcag aaattctgcc ggaactgccg 420

cgtctgcgcg tgctgattca gattgcagat gaatcaggta atgaattact ggatggtgca 480

gttgattatg aagatgcctt agcaagcgtg agcgcccagc cgccgccggt tcgtcattgt 540

ccggatgatc tgtatgttct gtataccggc ggtaccaccg gtatgccgaa aggcgtttta 600

tggcgtcagc atgatatttt tatgacctct tttggcggtc gtaatctgat gaccggcgaa 660

cctagctcta gtattgatga aattgttcag cgcgcagcct caggtccggg taccaaatta 720

atgattctgc cgccgttaat tcatggtgcc gcacagtgga gtgttatgac cgcaattacc 780

accggccaga ccgtggtgtt tccgaccgtt gtggatcatc tggatgcaga agatgtggtt 840

cgtaccattg aacgtgaaaa agttatggtt gtgaccgtgg tgggcgatgc aatggcacgt 900

ccgttagttg ccgcaattga aaaaggtatt gccgatgtgt cttcactagc cgtggtagcc 960

aatggcggcg ccctgctgac cccgtttgtt aaacagcgtc tgattgaagt gctgccgaat 1020

gcagtggttg tggatggtgt tggctcaagc gaaaccggtg cacagatgca tcacatgtct 1080

acccccggcg ccgtggcaac cggtaccttt aatgcaggtc cggatacctt tgttgccgca 1140

gaggacctga gcgccatttt accgccgggc catgaaggca tgggctggtt agcccagcgc 1200

ggctatgttc cgttaggcta taaaggcgat gcagccaaaa ccgccaaaac ctttccggtt 1260

attgatggcg tgcgctatgc agttccgggt gatcgcgcac gtcatcatgc agatggtcat 1320

attgaactgc tgggtcgcga tagtgtttgt attaatagcg gcggcgaaaa aatttttgtg 1380

gaagaagtgg aaaccgcaat tgcctcacat ccggcagttg ccgatgtggt tgtggcaggt 1440

cgtccgagtg aacgctgggg tcaggaagtt gttgcagttg tggccctgag cgatggtgca 1500

gcagtggatg caggcgaact gattgcacat gcctctaatt ccctggctcg ctataaactg 1560

ccgaaagcca ttgtgtttcg cccggttatt gaacgctctc cgagcggtaa agccgattat 1620

cgttgggcac gcgaacaggc agttaatggt taa 1653

<210> 16

<211> 1227

<212> DNA

<213> Artificial sequence

<400> 16

gattttgcct atagtccgaa agttcaggca ttacgtgaac gtgtgaccgc ctttatggat 60

gcacatgtgt atccagccga agcagtgttt gaacgccagg ttgccgaagg tgatcgctgg 120

cagccgaccg ccattatgga agaactgaaa gccaaagcac gcgccgaagg cctgtggaat 180

ctgtttctgc cggaatcaga atatggtgca ggtctgtcta atctggaata tgcaccgtta 240

gcagaaatta tgggccgtag cttactgggc ccggaaccgt ttaattgtag tgccccggat 300

accggtaata tggaagtttt agttcgctat ggtagcgaag cccagaaacg tcagtggtta 360

gaaccgttac tgcgcggtga aattcgtagt gcctttgcaa tgaccgaacc ggatgttgca 420

tctagcgatg ccaccaatat ggcagcaacc gcaattcgcg atggcgatca gtgggttatt 480

aatggtcgca aatggtggac ctcaggcgcc tgtgatccgc gttgtaaagt gatgattttt 540

atgggcttaa gcgatccgga aggcccgcgt catcagcagc attcaatggt gctggttccg 600

accgatacgc caggtgttaa aattgtgcgt ccgctgccgg tgtttggcta tgatgatgcc 660

ccgcatggtc atgccgaagt gctgtttgaa aatgttcgtg ttccgtatga aaatgttatt 720

ttaggcgaag gtcgcggctt tgaaattgca cagggtcgtc tggggcctgg tcgtattcat 780

cattgtatgc gctctattgg catggcagaa cgcgcattag aactgatgtg taaacgctca 840

gttgaacgta ccgcctttgg tcgtccgtta gcacgtctgg gcggtaatgt ggataaaatt 900

gcagattctc gcatggaaat tgatatggca cgcttactga ccttaaaagc cgcctatatg 960

atggataccg tgggtaataa agttgcacgc tctgaaattg cacagattaa agttgtggcc 1020

ccgaatgtgg ccctgaatgt tattgatcgt gccattcaga ttcatggcgg cgcaggcgtg 1080

agcggcgatt ttccgttagc ctatatgtat gccatgcagc gtaccctgcg tttagcagat 1140

ggtccggatg aagttcatcg cgcagccatt ggcaaatatg aaattggtaa atatgttccg 1200

gttgaaatgc tgcgctcagg tcgttaa 1227

<210> 17

<211> 423

<212> DNA

<213> Artificial sequence

<400> 17

ggatccatga tttggcagcg caccgccacc ctggatgcac tgaatgcaat gggtgcgaat 60

aatatggtgg gcctgctgga tattcgcttt acccgtctgg atgataatga aattgaagca 120

accatgccgg ttgatcatcg tacccatcaa cctttcggtt tactgcatgg cggcgcaagc 180

gtggtgttag ccgaaacctt aggtagtgtt gcaggctatc tgtgtaccga aggcgaacag 240

aatattgtgg gcttagaagt taatgccaat catttacgct cagtgcgtag cggtcgcgtg 300

cgcggcgtgt gtcgcgcagt tcatgtgggt cgtcgtcatc aggtttggca gattgaaatt 360

tttgatgaac aggatcgctt atgttgtagc tctcgtctga ccaccgccgt tgtgtaactc 420

gag 423

<210> 18

<211> 1064

<212> PRT

<213> Artificial sequence

<400> 18

Met Pro Thr Leu Pro Arg Thr Phe Asp Asp Ile Gln Ser Arg Leu Ile

1 5 10 15

Asn Ala Thr Ser Arg Val Val Pro Met Gln Arg Gln Ile Gln Gly Leu

20 25 30

Lys Phe Leu Met Ser Ala Lys Arg Lys Thr Phe Gly Pro Arg Arg Pro

35 40 45

Met Pro Glu Phe Val Glu Thr Pro Ile Pro Asp Val Asn Thr Leu Ala

50 55 60

Leu Glu Asp Ile Asp Val Ser Asn Pro Phe Leu Tyr Arg Gln Gly Gln

65 70 75 80

Trp Arg Ala Tyr Phe Lys Arg Leu Arg Asp Glu Ala Pro Val His Tyr

85 90 95

Gln Lys Asn Ser Pro Phe Gly Pro Phe Trp Ser Val Thr Arg Phe Glu

100 105 110

Asp Ile Leu Phe Val Asp Lys Ser His Asp Leu Phe Ser Ala Glu Pro

115 120 125

Gln Ile Ile Leu Gly Asp Pro Pro Glu Gly Leu Ser Val Glu Met Phe

130 135 140

Ile Ala Met Asp Pro Pro Lys His Asp Val Gln Arg Ser Ser Val Gln

145 150 155 160

Gly Val Val Ala Pro Lys Asn Leu Lys Glu Met Glu Gly Leu Ile Arg

165 170 175

Ser Arg Thr Gly Asp Val Leu Asp Ser Leu Pro Thr Asp Lys Pro Phe

180 185 190

Asn Trp Val Pro Ala Val Ser Lys Glu Leu Thr Gly Arg Met Leu Ala

195 200 205

Thr Leu Leu Asp Phe Pro Tyr Glu Glu Arg His Lys Leu Val Glu Trp

210 215 220

Ser Asp Arg Met Ala Gly Ala Ala Ser Ala Thr Gly Gly Glu Phe Ala

225 230 235 240

Asp Glu Asn Ala Met Phe Asp Asp Ala Ala Asp Met Ala Arg Ser Phe

245 250 255

Ser Arg Leu Trp Arg Asp Lys Glu Ala Arg Arg Ala Ala Gly Glu Glu

260 265 270

Pro Gly Phe Asp Leu Ile Ser Leu Leu Gln Ser Asn Lys Glu Thr Lys

275 280 285

Asp Leu Ile Asn Arg Pro Met Glu Phe Ile Gly Asn Leu Thr Leu Leu

290 295 300

Ile Val Gly Gly Asn Asp Thr Thr Arg Asn Ser Met Ser Gly Gly Leu

305 310 315 320

Val Ala Met Asn Glu Phe Pro Arg Glu Phe Glu Lys Leu Lys Ala Lys

325 330 335

Pro Glu Leu Ile Pro Asn Met Val Ser Glu Ile Ile Arg Trp Gln Thr

340 345 350

Pro Leu Ala Tyr Met Arg Arg Ile Ala Lys Gln Asp Val Glu Leu Gly

355 360 365

Gly Gln Thr Ile Lys Lys Gly Asp Arg Val Val Met Trp Tyr Ala Ser

370 375 380

Gly Asn Arg Asp Glu Arg Lys Phe Asp Asn Pro Asp Gln Phe Ile Ile

385 390 395 400

Asp Arg Lys Asp Ala Arg Asn His Met Ser Phe Gly Tyr Gly Val His

405 410 415

Arg Cys Met Gly Asn Arg Leu Ala Glu Leu Gln Leu Arg Ile Leu Trp

420 425 430

Glu Glu Ile Leu Lys Arg Phe Asp Asn Ile Glu Val Val Glu Glu Pro

435 440 445

Glu Arg Val Gln Ser Asn Phe Val Arg Gly Tyr Ser Arg Leu Met Val

450 455 460

Lys Leu Thr Pro Asn Ser Met Gly Gly Ile Pro Ser Pro Ser Arg Glu

465 470 475 480

Gln Ser Ala Lys Lys Glu Arg Lys Thr Val Glu Asn Ala His Asn Thr

485 490 495

Pro Leu Leu Val Leu Tyr Gly Ser Asn Met Gly Thr Ala Glu Gly Thr

500 505 510

Ala Arg Asp Leu Ala Asp Ile Ala Met Ser Lys Gly Phe Ala Pro Gln

515 520 525

Val Ala Thr Leu Asp Ser His Ala Gly Asn Leu Pro Arg Glu Gly Ala

530 535 540

Val Leu Ile Val Thr Ala Ser Tyr Asn Gly His Pro Pro Asp Asn Ala

545 550 555 560

Lys Glu Phe Val Asp Trp Leu Asp Gln Ala Ser Ala Asp Glu Val Lys

565 570 575

Gly Val Arg Tyr Ser Val Phe Gly Cys Gly Asp Lys Asn Trp Ala Thr

580 585 590

Thr Tyr Gln Lys Val Pro Ala Phe Ile Asp Glu Thr Leu Ala Ala Lys

595 600 605

Gly Ala Glu Asn Ile Ala Glu Arg Gly Glu Ala Asp Ala Ser Asp Asp

610 615 620

Phe Glu Gly Thr Tyr Glu Glu Trp Arg Glu His Met Trp Ser Asp Leu

625 630 635 640

Ala Ala Tyr Phe Asn Leu Asp Ile Glu Asn Ser Glu Glu Asn Ala Ser

645 650 655

Thr Leu Ser Leu Gln Phe Val Asp Ser Ala Ala Asp Met Pro Leu Ala

660 665 670

Lys Met His Arg Ala Phe Ser Ala Asn Val Val Ala Ser Lys Glu Leu

675 680 685

Gln Lys Pro Gly Ser Ala Arg Ser Thr Arg His Leu Glu Ile Glu Leu

690 695 700

Pro Lys Glu Ala Ser Tyr Gln Glu Gly Asp His Leu Gly Val Ile Pro

705 710 715 720

Arg Asn Tyr Glu Gly Ile Val Asn Arg Val Ala Thr Arg Phe Gly Leu

725 730 735

Asp Ala Ser Gln Gln Ile Arg Leu Glu Ala Glu Glu Glu Lys Leu Ala

740 745 750

His Leu Pro Leu Gly Lys Thr Val Ser Val Glu Glu Leu Leu Gln Tyr

755 760 765

Val Glu Leu Gln Asp Pro Val Thr Arg Thr Gln Leu Arg Ala Met Ala

770 775 780

Ala Lys Thr Val Cys Pro Pro His Lys Val Glu Leu Glu Val Leu Leu

785 790 795 800

Glu Lys Gln Ala Tyr Lys Glu Gln Val Leu Ala Lys Arg Leu Thr Met

805 810 815

Leu Glu Leu Leu Glu Lys Tyr Pro Ala Cys Glu Met Glu Phe Ser Glu

820 825 830

Phe Ile Ala Leu Leu Pro Ser Met Arg Pro Arg Tyr Tyr Ser Ile Ser

835 840 845

Ser Ser Pro Arg Val Asp Glu Lys Gln Ala Ser Ile Thr Val Ser Val

850 855 860

Val Ser Gly Glu Ala Trp Ser Gly Tyr Gly Glu Tyr Lys Gly Ile Ala

865 870 875 880

Ser Asn Tyr Leu Ala Asn Leu Gln Glu Gly Asp Thr Ile Thr Cys Phe

885 890 895

Val Ser Thr Pro Gln Ser Gly Phe Thr Leu Pro Lys Gly Pro Glu Thr

900 905 910

Pro Leu Ile Met Val Gly Pro Gly Thr Gly Val Ala Pro Phe Arg Gly

915 920 925

Phe Val Gln Ala Arg Lys Gln Leu Lys Glu Gln Gly Gln Ser Leu Gly

930 935 940

Glu Ala His Leu Tyr Phe Gly Cys Arg Ser Pro His Glu Asp Tyr Leu

945 950 955 960

Tyr Gln Lys Glu Leu Glu Asn Ala Gln Asn Glu Gly Ile Ile Thr Leu

965 970 975

His Thr Ala Phe Ser Arg Val Pro Asn Gln Pro Lys Thr Tyr Val Gln

980 985 990

His Val Met Glu Gln Asp Gly Lys Lys Leu Ile Glu Leu Leu Asp Gln

995 1000 1005

Gly Ala His Phe Tyr Ile Cys Gly Asp Gly Ser Gln Met Ala Pro

1010 1015 1020

Asp Val Glu Ala Thr Leu Met Lys Ser Tyr Ala Glu Val His Gln

1025 1030 1035

Val Ser Glu Ala Asp Ala Arg Leu Trp Leu Gln Gln Leu Glu Glu

1040 1045 1050

Lys Gly Arg Tyr Ala Lys Asp Val Trp Ala Gly

1055 1060

<210> 19

<211> 1064

<212> PRT

<213> Artificial sequence

<400> 19

Met Pro Thr Leu Pro Arg Thr Phe Asp Asp Ile Gln Ser Arg Leu Ile

1 5 10 15

Asn Ala Thr Ser Arg Val Val Pro Met Gln Arg Gln Ile Gln Gly Leu

20 25 30

Lys Phe Leu Met Ser Ala Lys Arg Lys Thr Phe Gly Pro Arg Arg Pro

35 40 45

Met Pro Glu Phe Val Glu Thr Pro Ile Pro Asp Val Asn Thr Leu Ala

50 55 60

Leu Glu Asp Ile Asp Val Ser Asn Pro Phe Leu Tyr Arg Gln Gly Gln

65 70 75 80

Trp Arg Ala Tyr Phe Lys Arg Leu Arg Asp Glu Ala Pro Val His Tyr

85 90 95

Gln Lys Asn Ser Pro Phe Gly Pro Phe Trp Ser Val Thr Arg Phe Glu

100 105 110

Asp Ile Leu Phe Val Asp Lys Ser His Asp Leu Phe Ser Ala Glu Pro

115 120 125

Gln Ile Ile Leu Gly Asp Pro Pro Glu Gly Leu Ser Val Glu Met Phe

130 135 140

Ile Ala Met Asp Pro Pro Lys His Asp Val Gln Arg Ser Ser Val Gln

145 150 155 160

Gly Val Val Ala Pro Lys Asn Leu Lys Glu Met Glu Gly Leu Ile Arg

165 170 175

Ser Arg Thr Gly Asp Val Leu Asp Ser Leu Pro Thr Asp Lys Pro Phe

180 185 190

Asn Trp Val Pro Ala Val Ser Lys Glu Leu Thr Gly Arg Met Leu Ala

195 200 205

Thr Leu Leu Asp Phe Pro Tyr Glu Glu Arg His Lys Leu Val Glu Trp

210 215 220

Ser Asp Arg Leu Ala Gly Ala Ala Ser Ala Thr Gly Gly Glu Phe Ala

225 230 235 240

Asp Glu Asn Ala Met Phe Asp Asp Ala Ala Asp Met Ala Arg Ser Phe

245 250 255

Ser Arg Leu Trp Arg Asp Lys Glu Ala Arg Arg Ala Ala Gly Glu Glu

260 265 270

Pro Gly Phe Asp Leu Ile Ser Leu Leu Gln Ser Asn Lys Glu Thr Lys

275 280 285

Asp Leu Ile Asn Arg Pro Met Glu Phe Ile Gly Asn Leu Thr Leu Leu

290 295 300

Ile Val Gly Gly Asn Asp Thr Thr Arg Asn Ser Met Ser Gly Gly Leu

305 310 315 320

Val Ala Met Asn Glu Phe Pro Arg Glu Phe Glu Lys Leu Lys Ala Lys

325 330 335

Pro Glu Leu Ile Pro Asn Met Val Ser Glu Ile Ile Arg Trp Gln Thr

340 345 350

Pro Leu Ala Tyr Met Arg Arg Ile Ala Lys Gln Asp Val Glu Leu Gly

355 360 365

Gly Gln Thr Ile Lys Lys Gly Asp Arg Val Val Met Trp Tyr Ala Ser

370 375 380

Gly Asn Arg Asp Glu Arg Lys Phe Asp Asn Pro Asp Gln Phe Ile Ile

385 390 395 400

Asp Arg Lys Asp Ala Arg Asn His Met Ser Phe Gly Tyr Gly Val His

405 410 415

Arg Cys Met Gly Asn Arg Leu Ala Glu Leu Gln Leu Arg Ile Leu Trp

420 425 430

Glu Glu Ile Leu Lys Arg Phe Asp Asn Ile Glu Val Val Glu Glu Pro

435 440 445

Glu Arg Val Gln Ser Asn Phe Val Arg Gly Tyr Ser Arg Leu Met Val

450 455 460

Lys Leu Thr Pro Asn Ser Met Gly Gly Ile Pro Ser Pro Ser Arg Glu

465 470 475 480

Gln Ser Ala Lys Lys Glu Arg Lys Thr Val Glu Asn Ala His Asn Thr

485 490 495

Pro Leu Leu Val Leu Tyr Gly Ser Asn Met Gly Thr Ala Glu Gly Thr

500 505 510

Ala Arg Asp Leu Ala Asp Ile Ala Met Ser Lys Gly Phe Ala Pro Gln

515 520 525

Val Ala Thr Leu Asp Ser His Ala Gly Asn Leu Pro Arg Glu Gly Ala

530 535 540

Val Leu Ile Val Thr Ala Ser Tyr Asn Gly His Pro Pro Asp Asn Ala

545 550 555 560

Lys Glu Phe Val Asp Trp Leu Asp Gln Ala Ser Ala Asp Glu Val Lys

565 570 575

Gly Val Arg Tyr Ser Val Phe Gly Cys Gly Asp Lys Asn Trp Ala Thr

580 585 590

Thr Tyr Gln Lys Val Pro Ala Phe Ile Asp Glu Thr Leu Ala Ala Lys

595 600 605

Gly Ala Glu Asn Ile Ala Glu Arg Gly Glu Ala Asp Ala Ser Asp Asp

610 615 620

Phe Glu Gly Thr Tyr Glu Glu Trp Arg Glu His Met Trp Ser Asp Leu

625 630 635 640

Ala Ala Tyr Phe Asn Leu Asp Ile Glu Asn Ser Glu Glu Asn Ala Ser

645 650 655

Thr Leu Ser Leu Gln Phe Val Asp Ser Ala Ala Asp Met Pro Leu Ala

660 665 670

Lys Met His Arg Ala Phe Ser Ala Asn Val Val Ala Ser Lys Glu Leu

675 680 685

Gln Lys Pro Gly Ser Ala Arg Ser Thr Arg His Leu Glu Ile Glu Leu

690 695 700

Pro Lys Glu Ala Ser Tyr Gln Glu Gly Asp His Leu Gly Val Ile Pro

705 710 715 720

Arg Asn Tyr Glu Gly Ile Val Asn Arg Val Ala Thr Arg Phe Gly Leu

725 730 735

Asp Ala Ser Gln Gln Ile Arg Leu Glu Ala Glu Glu Glu Lys Leu Ala

740 745 750

His Leu Pro Leu Gly Lys Thr Val Ser Val Glu Glu Leu Leu Gln Tyr

755 760 765

Val Glu Leu Gln Asp Pro Val Thr Arg Thr Gln Leu Arg Ala Met Ala

770 775 780

Ala Lys Thr Val Cys Pro Pro His Lys Val Glu Leu Glu Val Leu Leu

785 790 795 800

Glu Lys Gln Ala Tyr Lys Glu Gln Val Leu Ala Lys Arg Leu Thr Met

805 810 815

Leu Glu Leu Leu Glu Lys Tyr Pro Ala Cys Glu Met Glu Phe Ser Glu

820 825 830

Phe Ile Ala Leu Leu Pro Ser Met Arg Pro Arg Tyr Tyr Ser Ile Ser

835 840 845

Ser Ser Pro Arg Val Asp Glu Lys Gln Ala Ser Ile Thr Val Ser Val

850 855 860

Val Ser Gly Glu Ala Trp Ser Gly Tyr Gly Glu Tyr Lys Gly Ile Ala

865 870 875 880

Ser Asn Tyr Leu Ala Asn Leu Gln Glu Gly Asp Thr Ile Thr Cys Phe

885 890 895

Val Ser Thr Pro Gln Ser Gly Phe Thr Leu Pro Lys Gly Pro Glu Thr

900 905 910

Pro Leu Ile Met Val Gly Pro Gly Thr Gly Val Ala Pro Phe Arg Gly

915 920 925

Phe Val Gln Ala Arg Lys Gln Leu Lys Glu Gln Gly Gln Ser Leu Gly

930 935 940

Glu Ala His Leu Tyr Phe Gly Cys Arg Ser Pro His Glu Asp Tyr Leu

945 950 955 960

Tyr Gln Lys Glu Leu Glu Asn Ala Gln Asn Glu Gly Ile Ile Thr Leu

965 970 975

His Thr Ala Phe Ser Arg Val Pro Asn Gln Pro Lys Thr Tyr Val Gln

980 985 990

His Val Met Glu Gln Asp Gly Lys Lys Leu Ile Glu Leu Leu Asp Gln

995 1000 1005

Gly Ala His Phe Tyr Ile Cys Gly Asp Gly Ser Gln Met Ala Pro

1010 1015 1020

Asp Val Glu Ala Thr Leu Met Lys Ser Tyr Ala Glu Val His Gln

1025 1030 1035

Val Ser Glu Ala Asp Ala Arg Leu Trp Leu Gln Gln Leu Glu Glu

1040 1045 1050

Lys Gly Arg Tyr Ala Lys Asp Val Trp Ala Gly

1055 1060

<210> 20

<211> 550

<212> PRT

<213> Artificial sequence

<400> 20

Met Ser Asp Thr Thr Thr Ala Phe Thr Val Pro Ala Val Ala Lys Ala

1 5 10 15

Val Ala Ala Ala Ile Pro Asp Arg Glu Leu Ile Ile Gln Gly Asp Arg

20 25 30

Arg Tyr Thr Tyr Arg Gln Val Ile Glu Arg Ser Asn Arg Leu Ala Ala

35 40 45

Tyr Leu His Ser Gln Gly Leu Gly Cys His Thr Glu Arg Glu Ala Leu

50 55 60

Ala Gly His Glu Val Gly Gln Asp Leu Leu Gly Leu Tyr Ala Tyr Asn

65 70 75 80

Gly Asn Glu Phe Val Glu Ala Leu Leu Gly Ala Phe Ala Ala Arg Val

85 90 95

Ala Pro Phe Asn Val Asn Phe Arg Tyr Val Lys Ser Glu Leu His Tyr

100 105 110

Leu Leu Ala Asp Ser Glu Ala Thr Ala Leu Ile Tyr His Ala Ala Phe

115 120 125

Ala Pro Arg Val Ala Glu Ile Leu Pro Glu Leu Pro Arg Leu Arg Val

130 135 140

Leu Ile Gln Ile Ala Asp Glu Ser Gly Asn Glu Leu Leu Asp Gly Ala

145 150 155 160

Val Asp Tyr Glu Asp Ala Leu Ala Ser Val Ser Ala Gln Pro Pro Pro

165 170 175

Val Arg His Cys Pro Asp Asp Leu Tyr Val Leu Tyr Thr Gly Gly Thr

180 185 190

Thr Gly Met Pro Lys Gly Val Leu Trp Arg Gln His Asp Ile Phe Met

195 200 205

Thr Ser Phe Gly Gly Arg Asn Leu Met Thr Gly Glu Pro Ser Ser Ser

210 215 220

Ile Asp Glu Ile Val Gln Arg Ala Ala Ser Gly Pro Gly Thr Lys Leu

225 230 235 240

Met Ile Leu Pro Pro Leu Ile His Gly Ala Ala Gln Trp Ser Val Met

245 250 255

Thr Ala Ile Thr Thr Gly Gln Thr Val Val Phe Pro Thr Val Val Asp

260 265 270

His Leu Asp Ala Glu Asp Val Val Arg Thr Ile Glu Arg Glu Lys Val

275 280 285

Met Val Val Thr Val Val Gly Asp Ala Met Ala Arg Pro Leu Val Ala

290 295 300

Ala Ile Glu Lys Gly Ile Ala Asp Val Ser Ser Leu Ala Val Val Ala

305 310 315 320

Asn Gly Gly Ala Leu Leu Thr Pro Phe Val Lys Gln Arg Leu Ile Glu

325 330 335

Val Leu Pro Asn Ala Val Val Val Asp Gly Val Gly Ser Ser Glu Thr

340 345 350

Gly Ala Gln Met His His Met Ser Thr Pro Gly Ala Val Ala Thr Gly

355 360 365

Thr Phe Asn Ala Gly Pro Asp Thr Phe Val Ala Ala Glu Asp Leu Ser

370 375 380

Ala Ile Leu Pro Pro Gly His Glu Gly Met Gly Trp Leu Ala Gln Arg

385 390 395 400

Gly Tyr Val Pro Leu Gly Tyr Lys Gly Asp Ala Ala Lys Thr Ala Lys

405 410 415

Thr Phe Pro Val Ile Asp Gly Val Arg Tyr Ala Val Pro Gly Asp Arg

420 425 430

Ala Arg His His Asp Ala Gly His Ile Glu Leu Leu Gly Arg Asp Ser

435 440 445

Val Cys Ile Asn Ser Gly Gly Glu Lys Ile Phe Val Glu Glu Val Glu

450 455 460

Thr Ala Ile Ala Ser His Pro Ala Val Ala Asp Val Val Val Ala Gly

465 470 475 480

Arg Pro Ser Glu Arg Trp Gly Gln Glu Val Val Ala Val Val Ala Leu

485 490 495

Ser Asp Gly Ala Ala Val Asp Ala Gly Glu Leu Ile Ala His Ala Ser

500 505 510

Asn Ser Leu Ala Arg Tyr Lys Leu Pro Lys Ala Ile Val Phe Arg Pro

515 520 525

Val Ile Glu Arg Ser Pro Ser Gly Lys Ala Asp Tyr Arg Trp Ala Arg

530 535 540

Glu Gln Ala Val Asn Gly

545 550

<210> 21

<211> 408

<212> PRT

<213> Artificial sequence

<400> 21

Asp Phe Ala Tyr Ser Pro Lys Val Gln Ala Leu Arg Glu Arg Val Thr

1 5 10 15

Ala Phe Met Asp Ala His Val Tyr Pro Ala Glu Ala Val Phe Glu Arg

20 25 30

Gln Val Ala Glu Gly Asp Arg Trp Gln Pro Thr Ala Ile Met Glu Glu

35 40 45

Leu Lys Ala Lys Ala Arg Ala Glu Gly Leu Trp Asn Leu Phe Leu Pro

50 55 60

Glu Ser Glu Tyr Gly Ala Gly Leu Ser Asn Leu Glu Tyr Ala Pro Leu

65 70 75 80

Ala Glu Ile Met Gly Arg Ser Leu Leu Gly Pro Glu Pro Phe Asn Cys

85 90 95

Ser Ala Pro Asp Thr Gly Asn Met Glu Val Leu Val Arg Tyr Gly Ser

100 105 110

Glu Ala Gln Lys Arg Gln Trp Leu Glu Pro Leu Leu Arg Gly Glu Ile

115 120 125

Arg Ser Ala Phe Ala Met Thr Glu Pro Asp Val Ala Ser Ser Asp Ala

130 135 140

Thr Asn Met Ala Ala Thr Ala Ile Arg Asp Gly Asp Gln Trp Val Ile

145 150 155 160

Asn Gly Arg Lys Trp Trp Thr Ser Gly Ala Cys Asp Pro Arg Cys Lys

165 170 175

Val Met Ile Phe Met Gly Leu Ser Asp Pro Glu Gly Pro Arg His Gln

180 185 190

Gln His Ser Met Val Leu Val Pro Thr Asp Thr Pro Gly Val Lys Ile

195 200 205

Val Arg Pro Leu Pro Val Phe Gly Tyr Asp Asp Ala Pro His Gly His

210 215 220

Ala Glu Val Leu Phe Glu Asn Val Arg Val Pro Tyr Glu Asn Val Ile

225 230 235 240

Leu Gly Glu Gly Arg Gly Phe Glu Ile Ala Gln Gly Arg Leu Gly Pro

245 250 255

Gly Arg Ile His His Cys Met Arg Ser Ile Gly Met Ala Glu Arg Ala

260 265 270

Leu Glu Leu Met Cys Lys Arg Ser Val Glu Arg Thr Ala Phe Gly Arg

275 280 285

Pro Leu Ala Arg Leu Gly Gly Asn Val Asp Lys Ile Ala Asp Ser Arg

290 295 300

Met Glu Ile Asp Met Ala Arg Leu Leu Thr Leu Lys Ala Ala Tyr Met

305 310 315 320

Met Asp Thr Val Gly Asn Lys Val Ala Arg Ser Glu Ile Ala Gln Ile

325 330 335

Lys Val Val Ala Pro Asn Val Ala Leu Asn Val Ile Asp Arg Ala Ile

340 345 350

Gln Ile His Gly Gly Ala Gly Val Ser Gly Asp Phe Pro Leu Ala Tyr

355 360 365

Met Tyr Ala Met Gln Arg Thr Leu Arg Leu Ala Asp Gly Pro Asp Glu

370 375 380

Val His Arg Ala Ala Ile Gly Lys Tyr Glu Ile Gly Lys Tyr Val Pro

385 390 395 400

Val Glu Met Leu Arg Ser Gly Arg

405

<210> 22

<211> 237

<212> PRT

<213> Artificial sequence

<400> 22

Met Ser Asp Ser Glu Val Asn Gln Glu Ala Lys Pro Glu Val Lys Pro

1 5 10 15

Glu Val Lys Pro Glu Thr His Ile Asn Leu Lys Val Ser Asp Gly Ser

20 25 30

Ser Glu Ile Phe Phe Lys Ile Lys Lys Thr Thr Pro Leu Arg Arg Leu

35 40 45

Met Glu Ala Phe Ala Lys Arg Gln Gly Lys Glu Met Asp Ser Leu Arg

50 55 60

Phe Leu Tyr Asp Gly Ile Arg Ile Gln Ala Asp Gln Thr Pro Glu Asp

65 70 75 80

Leu Asp Met Glu Asp Asn Asp Ile Ile Glu Ala His Arg Glu Gln Ile

85 90 95

Gly Gly Ser Gly Ser Met Ile Trp Gln Arg Thr Ala Thr Leu Asp Ala

100 105 110

Leu Asn Ala Met Gly Ala Asn Asn Met Val Gly Leu Leu Asp Ile Arg

115 120 125

Phe Thr Arg Leu Asp Asp Asn Glu Ile Glu Ala Thr Met Pro Val Asp

130 135 140

His Arg Thr His Gln Pro Phe Gly Leu Leu His Gly Gly Ala Ser Val

145 150 155 160

Val Leu Ala Glu Thr Leu Gly Ser Val Ala Gly Tyr Leu Cys Thr Glu

165 170 175

Gly Glu Gln Asn Ile Val Gly Leu Glu Val Asn Ala Asn His Leu Arg

180 185 190

Ser Val Arg Ser Gly Arg Val Arg Gly Val Cys Arg Ala Val His Val

195 200 205

Gly Arg Arg His Gln Val Trp Gln Ile Glu Ile Phe Asp Glu Gln Asp

210 215 220

Arg Leu Cys Cys Ser Ser Arg Leu Thr Thr Ala Val Val

225 230 235

<210> 23

<211> 1410

<212> DNA

<213> Artificial sequence

<400> 23

atgccgacgt taccacgtac ctttgatgac attcagtctc gcttaatcaa tgctacaagt 60

cgtgtggttc caatgcagcg tcagattcag ggtctgaaat ttctgatgag tgccaaacgc 120

aaaacctttg gtccacgtcg cccaatgccg gaatttgtgg aaacacctat cccggatgtt 180

aatacattag ccttagagga cattgatgtg agtaatccgt ttctgtatcg ccagggccag 240

tggcgcgcat attttaaacg cttacgcgat gaagctccag ttcattatca gaaaaatagc 300

ccatttggtc cgttttggag cgtgacccgc tttgaggaca ttctgtttgt ggataaatca 360

catgatctgt ttagcgccga accacagatc atcttaggtg atcctccgga aggcctgtca 420

gtggaaatgt ttattgcgat ggaccctcct aaacatgatg tgcagcgctc tagtgttcag 480

ggtgtggttg cccctaaaaa tctgaaagaa atggaaggcc tgattcgtag tcgtacgggc 540

gatgtgttag attcattacc gacggataaa ccgtttaatt gggttcctgc ggtgagcaaa 600

gaactgacgg gtagaatgct ggctacctta ctggattttc cgtatgaaga acgtcataaa 660

ctggttgaat ggagcgatcg cttggccggt gcggcaagtg ctacgggcgg cgaatttgcg 720

gatgaaaatg ctatgtttga tgatgcggca gatatggcac gctctttttc tcgcctgtgg 780

cgcgataaag aagcccgccg tgcagcaggc gaagaaccgg gctttgattt aatctcactg 840

ctacagtcta ataaagaaac caaggatctg atcaatcgtc ctatggaatt tattggcaat 900

ctgaccctgc tgattgtggg cggtaatgat acgacccgca atagcatgtc aggcggctta 960

gttgccatga atgaatttcc tcgtgaattt gaaaaactga aagccaaacc ggaactgatt 1020

ccgaatatgg tgagcgaaat tattcgttgg cagacaccac tggcctatat gcgccgcatt 1080

gccaaacagg atgttgaact gggcggtcag accatcaaaa aaggtgatcg cgttgttatg 1140

tggtatgcct caggtaatcg cgatgaacgt aaatttgata atccggatca gtttattatc 1200

gatcgtaaag atgcacgcaa tcacatgtct tttggctatg gtgttcatcg ctgtatgggt 1260

aatcgtctgg ccgaattaca gctgcgtatt ctgtgggaag aaatcttaaa acgctttgat 1320

aatatcgaag ttgtggaaga accagaacgt gtgcagagca attttgttcg cggctatagc 1380

cgcttaatgg ttaaactgac acctaatagt 1410

<210> 24

<211> 470

<212> PRT

<213> Artificial sequence

<400> 24

Met Pro Thr Leu Pro Arg Thr Phe Asp Asp Ile Gln Ser Arg Leu Ile

1 5 10 15

Asn Ala Thr Ser Arg Val Val Pro Met Gln Arg Gln Ile Gln Gly Leu

20 25 30

Lys Phe Leu Met Ser Ala Lys Arg Lys Thr Phe Gly Pro Arg Arg Pro

35 40 45

Met Pro Glu Phe Val Glu Thr Pro Ile Pro Asp Val Asn Thr Leu Ala

50 55 60

Leu Glu Asp Ile Asp Val Ser Asn Pro Phe Leu Tyr Arg Gln Gly Gln

65 70 75 80

Trp Arg Ala Tyr Phe Lys Arg Leu Arg Asp Glu Ala Pro Val His Tyr

85 90 95

Gln Lys Asn Ser Pro Phe Gly Pro Phe Trp Ser Val Thr Arg Phe Glu

100 105 110

Asp Ile Leu Phe Val Asp Lys Ser His Asp Leu Phe Ser Ala Glu Pro

115 120 125

Gln Ile Ile Leu Gly Asp Pro Pro Glu Gly Leu Ser Val Glu Met Phe

130 135 140

Ile Ala Met Asp Pro Pro Lys His Asp Val Gln Arg Ser Ser Val Gln

145 150 155 160

Gly Val Val Ala Pro Lys Asn Leu Lys Glu Met Glu Gly Leu Ile Arg

165 170 175

Ser Arg Thr Gly Asp Val Leu Asp Ser Leu Pro Thr Asp Lys Pro Phe

180 185 190

Asn Trp Val Pro Ala Val Ser Lys Glu Leu Thr Gly Arg Met Leu Ala

195 200 205

Thr Leu Leu Asp Phe Pro Tyr Glu Glu Arg His Lys Leu Val Glu Trp

210 215 220

Ser Asp Arg Leu Ala Gly Ala Ala Ser Ala Thr Gly Gly Glu Phe Ala

225 230 235 240

Asp Glu Asn Ala Met Phe Asp Asp Ala Ala Asp Met Ala Arg Ser Phe

245 250 255

Ser Arg Leu Trp Arg Asp Lys Glu Ala Arg Arg Ala Ala Gly Glu Glu

260 265 270

Pro Gly Phe Asp Leu Ile Ser Leu Leu Gln Ser Asn Lys Glu Thr Lys

275 280 285

Asp Leu Ile Asn Arg Pro Met Glu Phe Ile Gly Asn Leu Thr Leu Leu

290 295 300

Ile Val Gly Gly Asn Asp Thr Thr Arg Asn Ser Met Ser Gly Gly Leu

305 310 315 320

Val Ala Met Asn Glu Phe Pro Arg Glu Phe Glu Lys Leu Lys Ala Lys

325 330 335

Pro Glu Leu Ile Pro Asn Met Val Ser Glu Ile Ile Arg Trp Gln Thr

340 345 350

Pro Leu Ala Tyr Met Arg Arg Ile Ala Lys Gln Asp Val Glu Leu Gly

355 360 365

Gly Gln Thr Ile Lys Lys Gly Asp Arg Val Val Met Trp Tyr Ala Ser

370 375 380

Gly Asn Arg Asp Glu Arg Lys Phe Asp Asn Pro Asp Gln Phe Ile Ile

385 390 395 400

Asp Arg Lys Asp Ala Arg Asn His Met Ser Phe Gly Tyr Gly Val His

405 410 415

Arg Cys Met Gly Asn Arg Leu Ala Glu Leu Gln Leu Arg Ile Leu Trp

420 425 430

Glu Glu Ile Leu Lys Arg Phe Asp Asn Ile Glu Val Val Glu Glu Pro

435 440 445

Glu Arg Val Gln Ser Asn Phe Val Arg Gly Tyr Ser Arg Leu Met Val

450 455 460

Lys Leu Thr Pro Asn Ser

465 470

<210> 25

<211> 45

<212> DNA

<213> Artificial sequence

<400> 25

tcgagctccg tcgacaagct tatggaaatg acatcagcgt ttacc 45

<210> 26

<211> 38

<212> DNA

<213> Artificial sequence

<400> 26

gtccacggag aattcatctc taatgctgtg ctgacgcc 38

<210> 27

<211> 22

<212> DNA

<213> Artificial sequence

<400> 27

ctgtactgga agccgcttat gg 22

<210> 28

<211> 44

<212> DNA

<213> Artificial sequence

<400> 28

gtggtggtgg tggtgctcga gttattgcag gtcagttgca gttg 44

<210> 29

<211> 25

<212> DNA

<213> Artificial sequence

<400> 29

gagatgaatt ctccgtggac ctgca 25

<210> 30

<211> 39

<212> DNA

<213> Artificial sequence

<400> 30

ataagcggct tccagtacag ggtaccgagc tcggatccg 39

<210> 31

<211> 24

<212> DNA

<213> Artificial sequence

<400> 31

atggaaatga catcagcgtt tacc 24

<210> 32

<211> 23

<212> DNA

<213> Artificial sequence

<400> 32

ttattgcagg tcagttgcag ttg 23

Claims

1. Escherichia coli gene deletion bacteria BL21 delta FadB, R and J are obtained by knocking out FadB genes, FadR genes and FadJ genes from Escherichia coli BL 21.

2. The use of the escherichia coli gene deletion bacterium BL21 Δ FadB, R and J as defined in claim 1 in the preparation of 10-hydroxy-2-decenoic acid.

3. The method for constructing escherichia coli gene-deleted bacteria BL21 delta FadB, R and J as claimed in claim 1, comprising the following steps:

knocking out genes by using an RED recombination method, and constructing a gene deletion delta FadRB strain;

II, knocking out genes by using an RED recombination method, and constructing escherichia coli gene deletion bacteria BL21 delta FadB, R and J, wherein the construction specifically comprises constructing a FadJ knock-out frame; and (3) transforming the FadJ knockout frame into pkd 46-delta FadR delta FadB competent cells to prepare escherichia coli gene deletion bacteria BL21 delta FadB, R and J.

4. The method of claim 3, wherein the step ii of constructing the FadR knockout box comprises the steps of:

taking a genome of escherichia coli BL21 as a template, amplifying an upstream homologous arm FadJ1 of the 3-hydroxyacyl-CoA dehydrogenase gene, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.25, and the nucleotide sequence of a downstream primer is shown as SEQ ID No. 26; taking a genome of escherichia coli BL21 as a template, amplifying a downstream homologous arm FadJ2 of the 3-hydroxyacyl-CoA dehydrogenase gene, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.27, and the nucleotide sequence of a downstream primer is shown as SEQ ID No. 28; taking pkd3 plasmid as a template, amplifying an FRT-RKan-FRT gene fragment, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.29, and the nucleotide sequence of a downstream primer is shown as SEQ ID NO. 30; then, carrying out multi-fragment seamless cloning on FadJl, FRT-RKan-FRT and FadJ2 gene fragments, amplifying a knockout frame fragment of FadJ1-Kan-FadJ2, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID No.31, the nucleotide sequence of a downstream primer is shown as SEQ ID No.32, and recovering purified glue to obtain a FadJ knockout frame;

preferably, the PCR amplification system is as follows, and the total system is 50 μ L:

mu.L 100. mu.M forward primer 2.0. mu.L, mu.L 100. mu.M reverse primer 2.0. mu.L, template 2.0. mu.L, 5U/. mu.L phanta enzyme 25. mu.L, ddH ₂ O19μL；

The PCR amplification conditions were as follows:

5. The construction method as claimed in claim 3, wherein the FadJ knockout frame is transformed into pkd46- Δ FadR Δ FadB recombinant bacteria in the step II, and finally the Escherichia coli gene deletion bacteria BL21 Δ FadB, R and J are obtained, comprising the following steps:

6. An engineering bacterium of Escherichia coli BL21 delta FadB, R, J, pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii is constructed by transforming recombinant plasmids pCDFDuet-1-MaMACS-PpFadE and pET28a-SUMO-ctYdii into the Escherichia coli gene deletion bacterium BL21 delta FadB, R and J in claim 1;

the nucleotide sequence of the fatty acyl CoA synthetase gene MaMACS is shown as SEQ ID NO. 15; the nucleotide sequence of the fatty acyl CoA dehydrogenase gene PpFadE is shown as SEQ ID NO. 16; the nucleotide sequence of the ester acyl-CoA thioesterase gene ctYdii is shown in SEQ ID NO. 17.

7. The engineered Escherichia coli BL21 Δ FadB, R, J, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii of claim 6, wherein the recombinant plasmid pCDFDuet-1-MaMACS-PpFadE is constructed, comprising the steps of:

the PCR amplification system was as follows, 25. mu.L total:

The PCR amplification conditions were as follows:

pre-denaturation at 95 ℃ for 3 min; denaturation at 95 ℃ for 15S, annealing at 60 ℃ for 15S, extension at 72 ℃ for 40S, and circulation for 30 times; extending for 5min at 72 ℃;

preferably, the recombinant plasmid pET28a-SUMO-ctYdii is constructed by the following steps:

using a genome of escherichia coli DH5a as a template, amplifying an ester acyl coenzyme A thioesterase gene ctyydiI, wherein the nucleotide sequence of an upstream primer is shown as SEQ ID NO.11, the nucleotide sequence of a downstream primer is shown as SEQ ID NO.12, then performing double enzyme digestion on pET28a-SUMO plasmid and an ester acyl coenzyme A thioesterase gene ctyydiI respectively by BamHI and Xho I, and performing ligase ligation to prepare a recombinant plasmid pET28 a-SUMO-ctydiI;

the PCR amplification system was as follows, 25. mu.L total:

The PCR amplification conditions were as follows:

8. A method for preparing trans-2-decenoic acid by using decanoic acid as a raw material comprises the following steps:

(1) the engineering bacteria of Escherichia coli BL21 delta FadB, R, J, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii of claim 6, which are screened, induced and cultured to obtain induced cells;

(2) culturing the induced cells prepared in the step (1) by a transformation culture medium to prepare resting cells, and then adding capric acid into the resting cells of escherichia coli BL21 delta FadB, R, J, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii to culture to prepare trans-2-decenoic acid.

9. The method according to claim 8, wherein in the step (1), the engineering bacteria of Escherichia coli BL21 Δ FadB, R, J, pCDFDuet-1-MaMACS-PpFadE, pET28a-SUMO-ctYdii are inoculated into LB liquid medium containing 50 μ g/mL kanamycin, 100 μ g/mL ampicillin and 40 μ g/mL streptomycin at corresponding concentrations, and screened and cultured at 35-40 ℃ with shaking until OD is reached ₆₀₀ 0.8 to 1.2;

preferably, in the step (1), after the bacteria solution after the screening culture is cooled to 18-20 ℃ and adapted for 0.5-1 hour, IPTG is added to the concentration of 0.5-0.8 mM, oleic acid is added to the concentration of 0.4-0.8% by mass, tween 80 is added to the concentration of 0.2-0.5% by mass, the induction culture is continued for 18-20 hours, and cells are separated to prepare induced cells;

preferably, in the step (1), the inducing culture conditions are that after the bacterial liquid of the screening culture is cooled to 20 ℃ to adapt for 1 hour, IPTG is respectively added to ensure that the concentration of IPTG in the culture medium is 0.5mM, oleic acid is added to ensure that the concentration of Tween in the culture medium is 0.6 percent, Tween 80 is added to ensure that the concentration of Tween in the culture medium is 0.3 percent, the inducing culture is continued for 18 hours, and cells are separated to prepare the inducing cells;

preferably, in the step (1), the cells are separated by centrifuging at 5000rpm for 15min, collecting the precipitate, and then washing with 0.85% by mass of saline.

10. The method of claim 8, wherein the transformation medium components in step (2) comprise the following:

0.8-1.2% of glycerol by mass fraction, 0.3-0.5% of glucose by mass fraction, 40-60 μ g/mL of kanamycin antibiotic, 90-110 μ g/mL of ampicillin, 30-50 μ g/mL of streptomycin antibiotic, and the balance of a 100mM potassium phosphate buffer solution with pH7.4 as a solvent;

preferably, glycerol is 1% by mass, glucose is 0.4% by mass, kanamycin antibiotic is 50. mu.g/mL, ampicillin is 100. mu.g/mL, streptomycin antibiotic is 40. mu.g/mL, and the balance is 100mM potassium phosphate buffer, pH 7.4;

preferably, capric acid is added into the resting cells in the step (2) to the concentration of 0.3-0.7g/L, and the reaction is carried out for 7-10h at the temperature of 28-37 ℃ to prepare trans-2-decenoic acid;

preferably, in the step (2), the concentration of converted decanoic acid is 0.5 g/L;

preferably, capric acid is added into the resting cells in the step (2) until the concentration is 0.5g/L, and the reaction is carried out for 9h at the temperature of 30 ℃ to prepare trans-2-decenoic acid;

preferably, in the step (2), the transformation culture condition is culture at 29-31 ℃ for 8 hours;

preferably, in the step (2), the decanoic acid is dissolved in dimethyl sulfoxide.