CN112899316B - 一种利用起皱假单胞菌ⅱ型合酶生产pha的方法 - Google Patents
一种利用起皱假单胞菌ⅱ型合酶生产pha的方法 Download PDFInfo
- Publication number
- CN112899316B CN112899316B CN202110214750.9A CN202110214750A CN112899316B CN 112899316 B CN112899316 B CN 112899316B CN 202110214750 A CN202110214750 A CN 202110214750A CN 112899316 B CN112899316 B CN 112899316B
- Authority
- CN
- China
- Prior art keywords
- synthase
- pha
- pseudomonas
- phac2
- carbon source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 241000589516 Pseudomonas Species 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 38
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims abstract description 33
- 239000013613 expression plasmid Substances 0.000 claims abstract description 7
- 238000000855 fermentation Methods 0.000 claims description 30
- 230000004151 fermentation Effects 0.000 claims description 30
- 239000002609 medium Substances 0.000 claims description 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000001963 growth medium Substances 0.000 claims description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 18
- 235000010755 mineral Nutrition 0.000 claims description 18
- 239000011707 mineral Substances 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 18
- 238000012217 deletion Methods 0.000 claims description 13
- 230000037430 deletion Effects 0.000 claims description 13
- 239000006142 Luria-Bertani Agar Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 9
- 239000002054 inoculum Substances 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 8
- 241001052560 Thallis Species 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 229940041514 candida albicans extract Drugs 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 239000012137 tryptone Substances 0.000 claims description 5
- 239000012138 yeast extract Substances 0.000 claims description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000001954 sterilising effect Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 229920001817 Agar Polymers 0.000 claims description 3
- 239000008272 agar Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- GHPYJLCQYMAXGG-WCCKRBBISA-N (2R)-2-amino-3-(2-boronoethylsulfanyl)propanoic acid hydrochloride Chemical compound Cl.N[C@@H](CSCCB(O)O)C(O)=O GHPYJLCQYMAXGG-WCCKRBBISA-N 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- 229910021380 Manganese Chloride Inorganic materials 0.000 claims description 2
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 claims description 2
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 claims description 2
- FRHBOQMZUOWXQL-UHFFFAOYSA-L ammonium ferric citrate Chemical compound [NH4+].[Fe+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O FRHBOQMZUOWXQL-UHFFFAOYSA-L 0.000 claims description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 2
- DGLRDKLJZLEJCY-UHFFFAOYSA-L disodium hydrogenphosphate dodecahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].OP([O-])([O-])=O DGLRDKLJZLEJCY-UHFFFAOYSA-L 0.000 claims description 2
- 229960004642 ferric ammonium citrate Drugs 0.000 claims description 2
- 239000004313 iron ammonium citrate Substances 0.000 claims description 2
- 235000000011 iron ammonium citrate Nutrition 0.000 claims description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 239000011565 manganese chloride Substances 0.000 claims description 2
- 235000002867 manganese chloride Nutrition 0.000 claims description 2
- 229940099607 manganese chloride Drugs 0.000 claims description 2
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 claims description 2
- 239000011684 sodium molybdate Substances 0.000 claims description 2
- 235000015393 sodium molybdate Nutrition 0.000 claims description 2
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 claims description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 2
- 229960001763 zinc sulfate Drugs 0.000 claims description 2
- 239000013612 plasmid Substances 0.000 claims 3
- 238000012258 culturing Methods 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 1
- 239000013604 expression vector Substances 0.000 claims 1
- 230000008014 freezing Effects 0.000 claims 1
- 238000007710 freezing Methods 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 claims 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract description 15
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 abstract description 10
- 241000894006 Bacteria Species 0.000 abstract description 9
- 108090000790 Enzymes Proteins 0.000 abstract description 8
- 102000004190 Enzymes Human genes 0.000 abstract description 8
- 230000005714 functional activity Effects 0.000 abstract description 6
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 abstract description 5
- 239000005715 Fructose Substances 0.000 abstract description 5
- 229930091371 Fructose Natural products 0.000 abstract description 5
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 abstract description 5
- 239000005639 Lauric acid Substances 0.000 abstract description 5
- 239000000176 sodium gluconate Substances 0.000 abstract description 5
- 235000012207 sodium gluconate Nutrition 0.000 abstract description 5
- 229940005574 sodium gluconate Drugs 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 108010010718 poly(3-hydroxyalkanoic acid) synthase Proteins 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 57
- 208000037534 Progressive hemifacial atrophy Diseases 0.000 description 49
- 238000012017 passive hemagglutination assay Methods 0.000 description 49
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 49
- 241000252867 Cupriavidus metallidurans Species 0.000 description 37
- 238000005119 centrifugation Methods 0.000 description 24
- 241000589776 Pseudomonas putida Species 0.000 description 13
- 101150048611 phaC gene Proteins 0.000 description 11
- 238000001228 spectrum Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- 238000012136 culture method Methods 0.000 description 7
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 6
- 101100463820 Pseudomonas oleovorans phaC2 gene Proteins 0.000 description 6
- 230000001580 bacterial effect Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 108090000623 proteins and genes Proteins 0.000 description 6
- 230000032050 esterification Effects 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000004817 gas chromatography Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 241000607528 Aeromonas hydrophila Species 0.000 description 2
- 239000012620 biological material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000415 inactivating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- -1 Hydroxy fatty acid esters Chemical class 0.000 description 1
- 241000589781 Pseudomonas oleovorans Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013028 medium composition Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 210000000130 stem cell Anatomy 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P7/00—Preparation of oxygen-containing organic compounds
- C12P7/62—Carboxylic acid esters
- C12P7/625—Polyesters of hydroxy carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Genetics & Genomics (AREA)
- Biotechnology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Virology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Enzymes And Modification Thereof (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
本发明涉及PHA生物合成领域,具体涉及一种新型生产PHA的方法。具体实施方案是:以起皱假单胞菌为出发菌株,利用起皱假单胞菌pBBR1MCS2‑phaC1、pBBR1MCS2‑phaC2的表达质粒,选用果糖、甘油、月桂酸、葡萄糖酸钠、油酸钠等不同碳源验证起皱假单胞菌pBBR1MCS2‑phaC2合酶功能活性,结果表明重组菌可以利用油酸钠为碳源产生了PHA。从而保证了今后嵌合酶的成功构建,嵌合PHA合酶可以扩展其底物的广泛性,以提高PHA产量,极大的促进PHA的广泛应用。
Description
技术领域
本发明属于微生物技术领域,具体涉及一种利用起皱假单胞菌II型合酶生产PHA的方法。
背景技术
羟基脂肪酸酯(PHA)是一种由许多细菌在营养不平衡条件下合成的胞内能量和碳源贮藏性的物质。PHA有着良好的生物相容性、生物可降解性、憎水性以及由不同官能团带来的独特性质,被用作组织工程材料药物缓释材料,是一种有很好发展潜力的生物材料,但目前生物合成的PHA存在产率低、成本高、单体组分单一等问题,不能满足各领域对于新型生物材料的需求,学术界和产业界等研究人员都试图通过各种方法解决这一关键技术问题。PHA合成中很需多种酶的参与,利用分子生物学技术对PHA合酶进行改造以改变其底物特异性、提高催化活性、改变单体组成、获得新型PHA是当前研究热点。
由于起皱假单胞菌388 II型合酶(phaC2)与恶臭假单胞菌KT2442II型合酶(phaC2)基因序列同源性为73.1%,且恶臭假单胞菌KT2442与起皱假单胞菌388均可利用多种碳源合成PHA,适合构建嵌合酶。恶臭假单胞菌KT2442 phaC2已有人成功克隆并表达,而对于起皱假单胞菌phaC2研究较少,尚未成功验证起皱假单胞菌phaC2的表达质粒功能活性,若其功能活性,即可构建II型嵌合酶。
构建嵌合酶则可以融合不同菌株PHA合酶的特性,使底物范围扩大、改变产物PHA的单体组分,从而产生新型PHA。这些对于今后PHA生产成本的降低、新型PHA的合成具有重大理论和实践意义,将极大的促进PHA的广泛应用。
发明内容
为了解决以上问题,本发明提供起皱假单胞菌构建II型嵌合酶生产PHA的方法,以解决PHA生产量低和生产成本高的问题。
为了达到上述目的,本发明采用以下技术方案:
一种利用起皱假单胞菌株II型合酶生产PHA方法,包括如下步骤:
1)挑取在LB琼脂培养基上30℃温度下培养12h的起皱假单胞菌单菌落接种于10mlLB培养基中,在30℃,200rpm,摇床培育8-12h,作为种子液;
2)将种子液以5%接种量接种于矿物盐发酵培养基,在30℃,200rpm条件下,摇床培养72h;
3)培养结束后,洗涤、收集菌体;
4)将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
上述的一种利用起皱假单胞菌株II型合酶生产PHA方法,LB培养基的制备方法如下:取5g/l酵母提取物、10g/l胰蛋白胨、10g/lNaCl,分装后在121℃灭菌15-20min。
上述的一种利用起皱假单胞菌株II型合酶生产PHA方法,所述的LB琼脂培养基的制备方法如下:取5g/l酵母提取物、10g/l胰蛋白胨、10g/lNaCl,加入15g/l的琼脂粉,分装后在121℃灭15-20min。
上述的一种利用起皱假单胞菌株II型合酶生产PHA方法,所述的矿物盐发酵培养基,由组分I、组分II、组分III和组分IV组成;
所述的组分I为:十二水磷酸氢二钠180g/l、磷酸氢二钾30g/l;
所述的组分II为:硫酸铵1g/l、硫酸镁0.41g/l;
所述的组分III为:柠檬酸铁铵(17%)5g/l、氯化钙2g/l;
所述的组分IV为:氯化镍20mg/l、硫酸铜10mg/l、钼酸钠30mg/l、氯化锰30mg/l、氯化钴200mg/l、硫酸锌100mg/l、硼酸300mg/l。
上述的一种利用起皱假单胞菌株II型合酶生产PHA方法,步骤3)具体为培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。
上述的一种利用起皱假单胞菌株II型合酶生产PHA方法,所述的矿物盐发酵培养基中含有碳源,所述的碳源是甘油、月桂酸、葡萄糖酸钠、果糖、油酸钠中的一种。
本发明的有益效果是:证明一种新型用于生产合成PHA的菌株,以油酸钠为碳源的pBBR1MCS2-phaC2的重组菌可用于生产PHA,从而为下一步嵌合酶的构建和继续研发生产PHA提供了基础。
附图说明
图1是中长链PHA标准品的气相色谱分析图谱。
图2是R.eutropha PHB-4利用油酸钠发酵后GC图谱。
图3含有空载体的R.eutropha PHB-4利用油酸钠发酵后的GC图谱。
图4是重组R.eutropha PHB-4-phaC2利用油酸钠发酵后的GC图谱。
图5为中长链PHA标准品的GC图谱
图6为对照组的含有空载体的R.eutropha PHB-4利用油酸钠发酵后的GC图谱
图7对照组的R.eutropha PHB-4合酶缺失突变株利用油酸钠发酵后的GC图谱
图8为重组R.eutropha PHB-4-phaC2利用油酸钠发酵后的GC图谱
具体实施方式
实施例1用起皱假单胞菌II型合酶以油酸钠为碳源生产PHA
菌种:起皱假单胞菌pBBR1MCS2-phaC2
培养基:
1.LB培养基:5g/l酵母提取物、10g/l胰蛋白胨、10g/lNaCl,分装后在121℃灭菌15-20min。
2.LB琼脂培养基(pH7.0-7.2):加入上述各成分后,加入15g/l的琼脂粉,分装后在121℃灭15-20min。
3.矿物盐发酵培养基:
表1矿物盐发酵培养基组分表
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的油酸钠于组分II中为碳源配制矿物盐发酵培养基,以5%接种量接种于pBBR1MCS2-phaC2的重组菌(来自本实验室保存),摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
一种利用起皱假单胞菌株II型合酶生产PHA方法首先对起皱假单胞菌388 II型合酶(phaC2)与其他菌株基因序列的同源性进行对比:
表2 PHA产生菌菌株的序列同源性对比表
注:
1:食油假单胞菌(P.oleovorans)14682Ⅰ型合酶(phbC)GenBank:AF422800
2:恶臭假单胞菌(P.putida)II型合酶KT2442(phaC1)GenBank:AF150670
3:恶臭假单胞菌(P.putida)II型合酶KT2442(phaC2)GenBank:AF150670
4:起皱假单胞菌(P.corrugata)388 II型合酶(phaC1)GenBank:GU966686
5:起皱假单胞菌(P.corrugata)388 II型合酶(phaC2)GenBank:GU966687
6:嗜水气单胞菌(A.hydrophila)WQⅠ型合酶(phaC)GenBank:AY665302
上表为本实验室产PHA产生菌菌株序列同源性对比,可知基因序列同源性最高的为起皱假单胞菌388 II型合酶(phaC2)与恶臭假单胞菌KT2442 II型合酶(phaC2)基因序列,同源性达到73.1%,恶臭假单胞菌KT2442 phaC2(来自清华大学生物科学与技术系)已有人成功克隆并表达,而对于起皱假单胞菌phaC2研究较少,但本实验室已成功克隆并申请GeneBank号(GU966686,GU966687),同时成功构建了起皱假单胞菌phaC2的表达质粒,尚未成功验证其功能活性,只需验证其功能活性,即可构建II型嵌合酶,生产PHA。
对比例1用空载体的R.eutropha PHB-4以油酸钠为碳源生产PHA
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的油酸钠于组分II中为碳源配制矿物盐发酵培养基,以5%接种量接种于空载体的R.eutropha PHB-4(来自本实验室保存),摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
对比例2用R.eutropha PHB-4合酶缺失突变株以油酸钠为碳源生产PHA
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的油酸钠于组分II中为碳源配制矿物盐发酵培养基,以5%接种量于R.eutropha PHB-4合酶缺失突变株(来自本实验室保存),摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
对比例3用起皱假单胞菌II型合酶以甘油为碳源生产PHA
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的甘油于组分II中为碳源配制矿物盐发酵培养基,以5%接种量分别接种:空载体的R.eutropha PHB-4、对照组的R.eutropha PHB-4合酶缺失突变株和重组R.eutropha PHB-4,摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
对比例4用起皱假单胞菌II型合酶以月桂酸为碳源生产PHA
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的月桂酸为碳源于组分II中配制矿物盐发酵培养基,以5%接种量分别接种:空载体的R.eutropha PHB-4、对照组的R.eutropha PHB-4合酶缺失突变株和重组R.eutropha PHB-4,摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
对比例5用起皱假单胞菌II型合酶以葡萄糖酸钠为碳源生产PHA
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的葡萄糖酸钠为碳源于组分II配制矿物盐发酵培养基,以5%接种量分别接种:空载体的R.eutropha PHB-4、对照组的R.eutropha PHB-4合酶缺失突变株和重组R.eutropha PHB-4,摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
对比例6用起皱假单胞菌II型合酶以果糖为碳源生产PHA
培养方法:起皱假单胞菌在LB琼脂培养基上30℃培养12h左右,挑取单菌落接种于10ml LB培养基中,摇床30℃,200rpm,8-12h,作为种子液。再添加1%的果糖为碳源于组分II配制矿物盐发酵培养基,以5%接种量分别接种:空载体的R.eutropha PHB-4、对照组的R.eutropha PHB-4合酶缺失突变株和重组R.eutropha PHB-4,摇床30℃,200rpm,72h。培养结束后,8000rpm离心10min收集菌体,蒸馏水洗菌体沉淀,8000rpm,离心10min收集菌体,再用95%乙醇洗涤菌体,8000rpm,离心10min收集菌体。将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重。
实施例2证明起皱假单胞菌II型合酶以油酸钠为碳源生产PHA
检测方法:称量细胞干重,气相色谱分析。
表3含有空载体R.eutropha PHB-4、对照组的R.eutropha PHB-4合酶缺失突变株和含有五种碳源的重组R.eutropha PHB-4的摇瓶发酵结果表
注:ND:not detected
称量细胞干重:如上表通过称量对比三组细胞:含有空载体R.eutropha PHB-4、对照组的R.eutropha PHB-4合酶缺失突变株和重组R.eutropha PHB-4,结果表明只有以油酸钠为碳源的重组菌产生PHA,约占细胞干重的1.25%。通过细胞干重测量结果可知,只有油酸钠为碳源的重组菌产生了PHA,因此继续对以油酸钠发酵含有空载体的R.eutropha PHB-4、R.eutropha PHB-4合酶缺失突变株和重组R.eutropha PHB-4-phaC2进行气相色谱分析检测。
气相色谱法制备样品:将50mg干细胞放入酯化管中,加入2ml氯仿和2ml酯化液,盖紧盖子。密闭置于100℃的烘箱中酯化4h。酯化后取出,冷却至室温后开盖,加入1ml无菌水,振荡混匀水相的有机相,静置放置待水相与氯仿相完全分层,将氯仿相转移到另外的管中保存,用于气相色谱分析。
图5为中长链PHA标准品的GC图谱,由GC图谱可知,标准PHA含有HO、HD、HDD。
图6为对照组的含有空载体的R.eutropha PHB-4利用油酸钠发酵后的GC图谱,并未检测到任何PHA。
图7为对照组的R.eutropha PHB-4合酶缺失突变株利用油酸钠发酵后的GC图谱,并未检测到任何PHA。
图8为重组R.eutropha PHB-4-phaC2利用油酸钠发酵后的GC图谱,可以重组菌以油酸钠为碳源成功生成PHA。
结果:带有pBBR1MCS2-phaC2的重组菌仅在油酸钠为碳源的培养基中能够产生PHA,而R.eutropha PHB-4合酶缺失突变株及不含pBBR1MCS2-phaC2的重组菌,不能产生PHA,从而证明了表达质粒构建成功且合酶基因具有功能。重组菌以油酸钠为碳源产生的PHA由3HO、3HD、3HDD组成,约占细胞干重的1.25%。
本发明中以葡萄糖酸钠、甘油、月桂酸、油酸钠、果糖五种碳源发酵,结果中只有以油酸钠为碳源的重组R.eutropha PHB-4菌株中产生PHA,而对照组的R.eutropha PHB-4合酶缺失突变株、含有空载体R.eutropha PHB-4菌株利用上述五种碳源发酵,GC检测均不能产生任何PHA,证明了合酶基因的功能,以油酸钠为碳源的pBBR1MCS2-phaC2的重组菌可用于生产PHA。
Claims (4)
1. 一种利用带有表达质粒pBBR1MCS2-phaC2的起皱假单胞菌株Ⅱ型合酶phaC2 R.eutropha PHB-4以油酸钠为碳源生产PHA方法,其特征在于,包括如下步骤:
1)挑取在LB琼脂培养基上30℃温度下培养12h的重组菌单菌落接种于10ml LB培养基中,在30℃,200 rpm,摇床培育8-12 h,作为种子液,所述重组菌是用R.eutropha PHB-4合酶缺失突变株表达质粒pBBR1MCS2-phaC2,所述phaC2是起皱假单胞菌P. corrugata 388Ⅱ型合酶,GenBank号为GU966687;
2)将种子液以5%接种量接种于矿物盐发酵培养基,在30℃,200 rpm条件下,摇床培养72 h;
3)培养结束后,洗涤、收集菌体;
4)将得到的湿细胞在-20℃冰箱中冷冻过夜,干燥到细胞恒重;
所述的矿物盐发酵培养基,由组分I、组分II、组分III和组分IV组成;
所述的组分I为20×:十二水磷酸氢二钠180 g/l、磷酸氢二钾30 g/l;
所述的组分II为:硫酸铵1 g/l、硫酸镁0.41 g/l;
所述的组分III为100×:柠檬酸铁铵5 g/l、氯化钙2 g/l;
所述的组分IV为1000×:氯化镍20 mg/l、硫酸铜10 mg/l、钼酸钠30 mg/l、氯化锰30mg/l、氯化钴200 mg/l、硫酸锌100 mg/l、硼酸300 mg/l;
所述的矿物盐发酵培养基中含有碳源,所述的碳源是1%的油酸钠。
2. 根据权利要求1所述的一种利用带有表达质粒pBBR1MCS2-phaC2的起皱假单胞菌株Ⅱ型合酶phaC2 R.eutropha PHB-4以油酸钠为碳源生产PHA方法,其特征在于,LB培养基的制备方法如下:取5 g/l酵母提取物、10 g/l胰蛋白胨、10 g/l NaCl,分装后在121℃灭菌15-20 min。
3. 根据权利要求2所述的一种利用带有表达质粒pBBR1MCS2-phaC2的起皱假单胞菌株Ⅱ型合酶phaC2 R.eutropha PHB-4以油酸钠为碳源生产PHA方法,其特征在于,所述的LB琼脂培养基的制备方法如下:取5 g/l酵母提取物、10 g/l胰蛋白胨、10 g/l NaCl,加入15 g/l的琼脂粉,分装后在121℃灭15-20 min。
4. 根据权利要求3所述的一种利用带有表达质粒pBBR1MCS2-phaC2的起皱假单胞菌株Ⅱ型合酶phaC2 R.eutropha PHB-4以油酸钠为碳源生产PHA方法,其特征在于,步骤3)具体为培养结束后,8000 rpm离心10 min收集菌体,蒸馏水洗菌体沉淀,8000 rpm,离心10 min收集菌体,再用95%乙醇洗涤菌体,8000 rpm,离心10 min收集菌体。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110214750.9A CN112899316B (zh) | 2021-02-26 | 2021-02-26 | 一种利用起皱假单胞菌ⅱ型合酶生产pha的方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110214750.9A CN112899316B (zh) | 2021-02-26 | 2021-02-26 | 一种利用起皱假单胞菌ⅱ型合酶生产pha的方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN112899316A CN112899316A (zh) | 2021-06-04 |
CN112899316B true CN112899316B (zh) | 2024-02-20 |
Family
ID=76108423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110214750.9A Active CN112899316B (zh) | 2021-02-26 | 2021-02-26 | 一种利用起皱假单胞菌ⅱ型合酶生产pha的方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112899316B (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2024516050A (ja) | 2022-04-06 | 2024-04-12 | シェンチェン ブルーファ バイオサイエンシズ カンパニー リミテッド | アセトアセチルCoAレダクターゼ変種を発現する遺伝子操作された微生物及びPHA生産量の向上方法 |
CN116121218B (zh) * | 2022-04-06 | 2023-11-24 | 深圳蓝晶生物科技有限公司 | 表达乙酰乙酰辅酶a还原酶变体的工程化微生物及提高pha产量的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1700909A2 (en) * | 1998-08-18 | 2006-09-13 | Metabolix, Inc. | Transgenic microbial polyhydroxyalkanoate producers |
CN104250628A (zh) * | 2013-06-25 | 2014-12-31 | 第三专利投资有限两合公司 | 新的环境分离株假单胞菌属物种IPB-B26 和N-128用于高效高产率产生mcl/lcl-PHA 的用途 |
CN110438030A (zh) * | 2019-06-27 | 2019-11-12 | 中国科学院城市环境研究所 | 一种恶臭假单胞菌Pseudomonas putida WP07、制备方法及用途 |
-
2021
- 2021-02-26 CN CN202110214750.9A patent/CN112899316B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1700909A2 (en) * | 1998-08-18 | 2006-09-13 | Metabolix, Inc. | Transgenic microbial polyhydroxyalkanoate producers |
CN104250628A (zh) * | 2013-06-25 | 2014-12-31 | 第三专利投资有限两合公司 | 新的环境分离株假单胞菌属物种IPB-B26 和N-128用于高效高产率产生mcl/lcl-PHA 的用途 |
CN110438030A (zh) * | 2019-06-27 | 2019-11-12 | 中国科学院城市环境研究所 | 一种恶臭假单胞菌Pseudomonas putida WP07、制备方法及用途 |
Non-Patent Citations (2)
Title |
---|
"Production of Polyhydroxyalkanoates and Extracellular Products Using Pseudomonas Corrugata and P. Mediterranea: A Review";等;《Bioengineering (Basel) 》;第6卷(第4期);第2、3、7节 * |
可再生生物柴油副产物合成生物材料PHA研究现状;胡风庆;回晶;;中国生物工程杂志(第11期);全文 * |
Also Published As
Publication number | Publication date |
---|---|
CN112899316A (zh) | 2021-06-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Quillaguamán et al. | Poly (β-hydroxybutyrate) production by a moderate halophile, Halomonas boliviensis LC1 | |
Shrivastav et al. | Isolation of promising bacterial strains from soil and marine environment for polyhydroxyalkanoates (PHAs) production utilizing Jatropha biodiesel byproduct | |
WO2023016058A1 (zh) | 一株盐单胞菌及其应用 | |
CN102120973B (zh) | 一株盐单胞菌及其应用 | |
Guo et al. | Simultaneous production and characterization of medium-chain-length polyhydroxyalkanoates and alginate oligosaccharides by Pseudomonas mendocina NK-01 | |
CN112899316B (zh) | 一种利用起皱假单胞菌ⅱ型合酶生产pha的方法 | |
Zhao et al. | Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) production by Haloarchaeon Halogranum amylolyticum | |
CN102212501B (zh) | 一种重组大肠杆菌及应用其以单一碳源生产phbv的方法 | |
CN113583922A (zh) | 一种以低盐培养基培养嗜盐菌生产pha的方法 | |
CN110438030B (zh) | 一种恶臭假单胞菌Pseudomonas putida WP07、制备方法及用途 | |
CN111593006A (zh) | 一株自凝絮嗜盐菌及其应用 | |
CN102226206B (zh) | 一种聚羟基丁酸酯的制备方法 | |
Yamaguchi et al. | Production of poly (3-hydroyxybutylate) by a novel alginolytic bacterium Hydrogenophaga sp. strain UMI-18 using alginate as a sole carbon source | |
CN113980828B (zh) | 一株高产绿原酸的栗褐芽孢杆菌诱变菌株 | |
CN116970659B (zh) | 一种生产聚羟基脂肪酸酯的方法 | |
Moriya et al. | Cobetia sp. bacteria, which are capable of utilizing alginate or waste Laminaria sp. for poly (3-hydroxybutyrate) synthesis, isolated from a marine environment | |
CN116574645A (zh) | 一株蜡样芽孢杆菌mg1及应用 | |
CN117165617A (zh) | 利用木糖生产p34hb的菌株及其构建方法和应用 | |
Lee et al. | Production and characterization of a biodegradable polymer, poly (3-hydroxybutyrate-co-3-hydroxyvalerate), using the type II methanotroph, Methylocystis sp. MJC1 | |
CN105039376B (zh) | 产3-羟基丙酸均聚物/共聚物的重组菌及构建方法与应用 | |
Meng et al. | Metabolic engineering for biosynthesis of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) from glucose and propionic acid in recombinant Escherichia coli | |
CN117701486B (zh) | 一种生产pha的重组菌及其构建方法与应用 | |
Simon-Colin et al. | A novel mcl-PHA produced on coprah oil by Pseudomonas guezennei biovar. tikehau, isolated from a “kopara” mat of French Polynesia | |
CN102154387B (zh) | 利用生物柴油副产物生产琥珀酸和聚羟基脂肪酸酯的方法 | |
Ramya et al. | Studies on the production and optimization of levan from Bacillus sp |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |