CN115261357A - 一种康氏副球菌(Paracoccus kondratievae)α/β水解酶F8A10_20830及其基因与应用 - Google Patents
一种康氏副球菌(Paracoccus kondratievae)α/β水解酶F8A10_20830及其基因与应用 Download PDFInfo
- Publication number
- CN115261357A CN115261357A CN202210007833.5A CN202210007833A CN115261357A CN 115261357 A CN115261357 A CN 115261357A CN 202210007833 A CN202210007833 A CN 202210007833A CN 115261357 A CN115261357 A CN 115261357A
- Authority
- CN
- China
- Prior art keywords
- paracoccus
- alpha
- gene
- beta hydrolase
- phthalate
- 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.)
- Pending
Links
- 108090000623 proteins and genes Proteins 0.000 title claims abstract description 25
- 241001057811 Paracoccus <mealybug> Species 0.000 title claims abstract description 22
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 8
- 239000002773 nucleotide Substances 0.000 claims abstract description 5
- 125000003729 nucleotide group Chemical group 0.000 claims abstract description 5
- 239000013604 expression vector Substances 0.000 claims abstract description 4
- 125000003275 alpha amino acid group Chemical group 0.000 claims abstract description 3
- 125000005498 phthalate group Chemical class 0.000 claims abstract 2
- 239000013598 vector Substances 0.000 claims description 11
- 238000010367 cloning Methods 0.000 claims description 5
- 102000004190 Enzymes Human genes 0.000 abstract description 12
- 108090000790 Enzymes Proteins 0.000 abstract description 12
- 230000007062 hydrolysis Effects 0.000 abstract description 12
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 12
- 241000588724 Escherichia coli Species 0.000 abstract description 10
- 239000003344 environmental pollutant Substances 0.000 abstract description 7
- 231100000719 pollutant Toxicity 0.000 abstract description 7
- 241000947167 Paracoccus kondratievae Species 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 abstract description 3
- 238000010353 genetic engineering Methods 0.000 abstract description 3
- 108090000604 Hydrolases Proteins 0.000 description 25
- 102000004157 Hydrolases Human genes 0.000 description 25
- NIQCNGHVCWTJSM-UHFFFAOYSA-N Dimethyl phthalate Chemical compound COC(=O)C1=CC=CC=C1C(=O)OC NIQCNGHVCWTJSM-UHFFFAOYSA-N 0.000 description 16
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 16
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 16
- MGWAVDBGNNKXQV-UHFFFAOYSA-N diisobutyl phthalate Chemical compound CC(C)COC(=O)C1=CC=CC=C1C(=O)OCC(C)C MGWAVDBGNNKXQV-UHFFFAOYSA-N 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 15
- 229940088598 enzyme Drugs 0.000 description 11
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 8
- 229960001826 dimethylphthalate Drugs 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 108020004414 DNA Proteins 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- -1 phthalate diester compound Chemical group 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000001988 toxicity Effects 0.000 description 5
- 231100000419 toxicity Toxicity 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000002609 medium Substances 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012880 LB liquid culture medium Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000005457 ice water Substances 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000006228 supernatant Substances 0.000 description 3
- 239000011534 wash buffer Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000001888 Peptone Substances 0.000 description 2
- 108010080698 Peptones Proteins 0.000 description 2
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000000872 buffer Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012149 elution buffer Substances 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- BPHPUYQFMNQIOC-NXRLNHOXSA-N isopropyl beta-D-thiogalactopyranoside Chemical compound CC(C)S[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O BPHPUYQFMNQIOC-NXRLNHOXSA-N 0.000 description 2
- 229930027917 kanamycin Natural products 0.000 description 2
- SBUJHOSQTJFQJX-NOAMYHISSA-N kanamycin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CN)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O[C@@H]2[C@@H]([C@@H](N)[C@H](O)[C@@H](CO)O2)O)[C@H](N)C[C@@H]1N SBUJHOSQTJFQJX-NOAMYHISSA-N 0.000 description 2
- 229960000318 kanamycin Drugs 0.000 description 2
- 229930182823 kanamycin A Natural products 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 235000019319 peptone Nutrition 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 108020000946 Bacterial DNA Proteins 0.000 description 1
- 230000004544 DNA amplification Effects 0.000 description 1
- 108010067770 Endopeptidase K Proteins 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 102000016943 Muramidase Human genes 0.000 description 1
- 108010014251 Muramidase Proteins 0.000 description 1
- 108010062010 N-Acetylmuramoyl-L-alanine Amidase Proteins 0.000 description 1
- 208000008589 Obesity Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000012408 PCR amplification Methods 0.000 description 1
- 108020002230 Pancreatic Ribonuclease Proteins 0.000 description 1
- 102000005891 Pancreatic ribonuclease Human genes 0.000 description 1
- 206010074268 Reproductive toxicity Diseases 0.000 description 1
- 240000006394 Sorghum bicolor Species 0.000 description 1
- 235000011684 Sorghum saccharatum Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 231100000049 endocrine disruptor Toxicity 0.000 description 1
- 239000000598 endocrine disruptor Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 230000037356 lipid metabolism Effects 0.000 description 1
- 229960000274 lysozyme Drugs 0.000 description 1
- 239000004325 lysozyme Substances 0.000 description 1
- 235000010335 lysozyme Nutrition 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000020824 obesity Nutrition 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical class OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 150000003021 phthalic acid derivatives Chemical class 0.000 description 1
- 239000013612 plasmid Substances 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000007696 reproductive toxicity Effects 0.000 description 1
- 231100000372 reproductive toxicity Toxicity 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002415 sodium dodecyl sulfate polyacrylamide gel electrophoresis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/16—Hydrolases (3) acting on ester bonds (3.1)
- C12N9/18—Carboxylic ester hydrolases (3.1.1)
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/02—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by biological methods, i.e. processes using enzymes or microorganisms
-
- 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
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/70—Vectors or expression systems specially adapted for E. coli
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/20—Organic substances
- A62D2101/28—Organic substances containing oxygen, sulfur, selenium or tellurium, i.e. chalcogen
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Genetics & Genomics (AREA)
- Zoology (AREA)
- Organic Chemistry (AREA)
- Biomedical Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Wood Science & Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Biophysics (AREA)
- Physics & Mathematics (AREA)
- Medicinal Chemistry (AREA)
- Plant Pathology (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Enzymes And Modification Thereof (AREA)
Abstract
本发明公开了一种来源于康氏副球菌(Paracoccus kondratievae)的α/β水解酶F8A10_20830及其编码基因与应用,属于生物基因工程技术领域。本发明公开的P.kondratievae的α/β水解酶F8A10_20830的氨基酸序列如SEQ.ID.NO.1所示,其编码基因的核苷酸序列如SEQ.ID.NO.2所示,利用此序列信息,克隆该基因,构建携带所述基因的大肠杆菌表达载体,同时还公开了所述的α/β水解酶F8A10_20830在催化水解污染物邻苯二甲酸酯类中的应用。本发明提供了一种高效催化邻苯二甲酸酯类水解的酶,且对邻苯二甲酸酯类的水解具有重要意义,适于作为邻苯二甲酸酯类物质降解的催化剂加以开发利用。
Description
技术领域
本发明属于生物基因工程技术领域,具体涉及一种康氏副球菌(Paracoccuskondratievae)α/β水解酶F8A10_20830及其基因在催化水解污染物邻苯二甲酸酯类中的应用。
背景技术
自2012年白酒塑化剂事件之后,白酒品质安全问题获得广泛关注,一系列对白酒安全存在影响的化合物被检测出来,如重金属、杀虫剂、氨基甲酸乙酯等。其中,塑化剂对白酒品质的负面影响尤为恶劣。探究白酒中塑化剂的消除机制,对于提高产品的饮用安全性,确保产品品质具有重要意义。塑化剂以邻苯二甲酸酯(Phthalate esters,PAEs)为代表,是一类内分泌干扰物,具有生殖毒性,同时,还会造成脂质代谢异常,诱发肥胖病,干扰免疫和过敏反应等。由于PAEs的生理毒性,探索有效的降解处理方式是解决这一问题的科学途径。研究表明,微生物酶法水解PAEs效率高,降解相对彻底,反应条件温和,不产生二次污染等问题,并且不扰动微生物菌群,不会产生多余的代谢物,为白酒中PAEs污染问题的解决提供了可行的途径。目前研究发现,PAEs的毒性关键在于其酯键侧链,如果能够有效水解酯键侧链,可以显著降低毒性。因此,开发适于白酒的微生物酶法有效水解PAEs侧链酯键以尽量降低或消除其毒性是当前迫切需要解决的问题。
最近针对白酒原料包括高梁、大米和小麦,以及基酒和市售白酒样品检测发现,各样品中共性存在的PAEs包括5种,分别是邻苯二甲酸二甲酯(DMP)、邻苯二甲酸二乙酯(DEP)、邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二异丁酯(DIBP)和邻苯二甲酸双(2-乙基己)酯(DEHP)。因此,考虑到不论对白酒原料、发酵过程以及产品处理时,至少需要同时对5种PAEs进行酯键侧链的有效水解以降低其毒性,但是大多数酶在进行PAEs酯键水解时存在底物特异性,仅对特定链长或结构的侧链酯键具有高效水解能力,并不能够有效水解不同链长和结构的各类PAEs侧链酯键。因此,邻苯二甲酸二酯化合物侧链单酯键的酶的底物分子识别和单酯键水解规律解析,具有重要意义。
发明内容
本发明的目的在于提供一种康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830及其基因在催化水解污染物邻苯二甲酸酯类物质中的应用。
本发明是通过以下技术方案来实现:
本发明公开了一种康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830,该蛋白的氨基酸序列如SEQ ID NO.1所示。
本发明还公开了一种康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830的编码基因,该基因的核苷酸序列如SEQ ID NO.2所示。
本发明还公开了一种含有上述康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830基因的大肠杆菌表达载体,所述载体克隆区域核苷酸序列如SEQ ID NO.2所示。
本发明还公开了一种含有上述康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830,具有催化水解污染物邻苯二甲酸酯类物质的性能。
与现有技术相比,本发明具有以下有益的技术效果:
本发明利用生物基因工程技术,克隆获得康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830基因,并构建含有该基因的大肠杆菌表达载体,将该重组质粒转入大肠杆菌中,经过IPTG诱导表达获得该酶,并经催化体系检测其水解DMP、DEP、DBP、DIBP和DEHP的能力,气相色谱的测试结果显示,底物含量明显下降,残余量分别为0.0mg/L,0.8mg/L,5.8mg/L,8.9mg/L和142.9mg/L。实验结果表明,α/β水解酶F8A10_20830可用于催化水解污染物邻苯二甲酸酯类物质。
本发明通过大肠杆菌工程菌诱导表达α/β水解酶F8A10_20830以开展对其催化水解污染物邻苯二甲酸酯类物质的功能研究,为微生物降解污染物的应用和发展奠定基础。
附图说明
图1为α/β水解酶F8A10_20830编码基因的PCR扩增结果
图2为α/β水解酶F8A10_20830编码基因的诱导表达结果
图3为α/β水解酶F8A10_20830催化水解DMP、DEP、DBP、DIBP和DEHP的气相色谱原始图谱
图4为α/β水解酶F8A10_20830催化水解DMP、DEP、DBP、DIBP和DEHP的定量计算结果(作为摘要附图)
具体实施方式
下面结合具体的附图和实施例对本发明做进一步的详细说明,所述是对本发明的解释而不是限定。下述实施例中未详细述及的操作步骤或条件,均按照本领域常规技术、条件实现。
实施例1 α/β水解酶F8A10_20830编码基因的克隆
1.1康氏副球菌(P.kondratievae)的培养
在无菌操作条件下,将康氏副球菌(P.kondratievae)接种于含有50mL LB液体培养基的300mL三角瓶中,在37±1℃,200±10rpm条件下培养12h。所述的LB液体培养基,其组成为酵母粉5.0g/L、蛋白胨10.0g/L、NaCl 10.0g/L,调节pH为7.0,121℃高压灭菌20min。
1.2康氏副球菌(P.kondratievae)基因组DNA的提取
对上述培养12h的康氏副球菌(P.kondratievae)取样,采用E.Z.N.A.细菌DNA试剂盒(Omega Bio-tek,GA,USA)提取基因组DNA。具体步骤如下:
(1)吸取2mL菌液到2.0mL离心管中,室温下,10000rpm离心1min,弃上清液。
(2)加入100μL TE Buffer,充分悬浮菌体。
(3)加入10μL Lysozyme,37℃孵育10min。
(4)加入100μL BTL Buffer和10μL Proteinase K Solution,涡旋振荡混匀,55℃水浴孵育20min。
(5)加入5μL RNase A,颠倒混合均匀,室温孵育5min,10000rpm离心2min,将上清液转移至新的1.5mL离心管中。
(6)加入220μL BDL Buffer,涡旋振荡混匀,65℃孵育10min。
(7)加入220μL 无水乙醇,涡旋振荡混匀。
(8)将上述混合液转移至一个带有收集管的吸附柱中(包括可能生成的任何沉淀),13000rpm室温离心1min,弃废液,更换收集管。
(9)加入500μL HBC Buffer,13000rpm室温离心1min,弃废液,将吸附柱重新放回到收集管中。
(10)加入700μL DNA Wash Buffer(确保无水乙醇已加入到DNA Wash Buffer中),13000rpm室温离心1min,弃废液,将吸附柱放回到收集管中。
(11)再次加入700μL DNA Wash Buffer,13000rpm室温离心1min,弃废液,将吸附柱重新放回到收集管中。
(12)13000rpm室温离心2min,去除残留的乙醇。
(13)将吸附柱放入一个1.5mL离心管中,加入50-100μL Elution Buffer(ElutionBuffer孵育至65℃后使用)于吸附柱中心,室温放置3-5min,10000rpm离心1min洗脱DNA。提取的DNA可直接用于后续实验或者-20℃存放。
1.3α/β水解酶F8A10_20830的编码基因的克隆
通过PCR扩增康氏副球菌(P.kondratievae)来源的α/β水解酶F8A10_20830的编码基因。引物序列如下:
正向引物P1F:5′-TAAGAAGGAGATATACCATGGTCGTAAACCGCGTCTCT-3′
反向引物P1R:5′-GGTGGTGCTCGAGTGCGATGTCGTAAACCGCGTCTCT-3′
PCR反应体系如表1所示。
表1 α/β水解酶F8A10_20830编码基因扩增的PCR反应体系
PCR反应程序如表2所示。
表2 α/β水解酶F8A10_20830编码基因扩增的PCR反应程序
实施例2构建表达α/β水解酶F8A10_20830的大肠杆菌工程菌株
2.1 pET-28a(+)载体的线性化
设计引物通过PCR进行pET-28a(+)载体的线性化。引物序列如下:
正向引物P2F:5′-CTGAGATCCGGCTGCTAA-3′
反向引物P2R:5′-ACTTCCTCTTGGCACCAGGCCGCTGCT-3′
PCR反应体系如表3所示。
表3线性化载体pET-28a(+)的PCR反应体系
PCR反应程序如表4所示。
表4线性化载体pET-28a(+)的PCR反应程序
PCR产物纯化后,用于载体构建。
2.2载体构建
利用 One Step Cloning Kit进行载体构建。引物设计原则:通过在引物5′端引入线性化载体末端同源序列,使得插入片段扩增产物5′和3′末端分别带有和线性化载体两末端对应的完全一致的序列(15-20bp)。基于此原则设计基因扩增的引物进行重组反应,于冰水浴中配制如下反应体系。连接反应体系如表5所示。
表5连接反应体系
体系配制完成后,用移液器轻柔吹吸混匀各组分。置于37±1℃条件下反应30min后,立即移至冰水浴中冷却5min。
2.3大肠杆菌的遗传转化
取5μL冷却反应液,加入至50μL大肠杆菌感受态细胞中,轻弹管壁数下混匀,冰上放置30min。42℃热激45-90秒,冰水浴孵育2min。加入600μL的LB液体培养基,37±1℃振荡培养60min使菌株充分复苏。取100μL菌液均匀涂布在含有适量卡那霉素的LB培养基平板上。将平板倒置,于37±1℃过夜培养。所述LB培养基配方:酵母粉5.0g/L、蛋白胨10.0g/L、NaCl 10.0g/L,调节pH为7.0,固体培养基需添加2%的琼脂粉,121℃高压灭菌20min。
实施例3 α/β水解酶F8A10_20830粗酶液催化水解DMP、DEP、DBP、DIBP和DEHP
3.1 α/β水解酶F8A10_20830的诱导表达
挑取经验证正确的转化子,转接至含有适量卡那霉素的LB液体培养基中,37±1℃过夜培养,以1%(v/v)的接种量接种于含有50mL LB培养基的300mL三角瓶中,37±1℃,200±10rpm培养3h,加入诱导剂IPTG(终浓度为0.5mM),25±1℃,200±10rpm培养20h。
3.2 α/β水解酶F8A10_20830的粗酶液制备
大肠杆菌诱导表达后13000rpm离心5min收集菌体,用pH 7.5的0.05M Tris-HCl缓冲液悬浮洗涤菌体2次,然后悬浮菌体。超声波细胞破碎仪破细胞,13000rpm离心5min,上清液作为粗酶液,首先通过SDS-PAGE检测目标蛋白的表达水平(图2),然后进行α/β水解酶F8A10_20830的PAEs水解特性检测。
3.3 F8A10_20830的粗酶液催化水解PAEs性能的检测
10mL的反应体系如下:
粗酶液,2mL;Tris-HCl缓冲液(pH 7.5),8mL;DMP、DEP、DBP、DIBP和DEHP,终浓度均为200mg/L。37±1℃条件下,150±10rpm水浴振荡22h。用3mL正己烷进行萃取,通过气相色谱定量检测PAEs的水解量。
色谱柱为Agilent 19091N-213I。检测条件为80℃保持3min,以20℃/min升至250℃保持17.5min。进样量为1μL,不分流。载气为氮气,流速为1mL/min,检测器为FID。
结果证实,本发明构建的表达α/β水解酶F8A10_20830的大肠杆菌工程菌产生的粗酶液具有催化水解DMP、DEP、DBP、DIBP和DEHP的能力(图3),残余量分别为0.0mg/L,0.8mg/L,5.8mg/L,8.9mg/L和142.9mg/L(图4)。
Claims (4)
1.一种来源于康氏副球菌(Paracoccus kondratievae)的α/β水解酶F8A10_20830,其特征在于,该α/β水解酶F8A10_20830的氨基酸序列如SEQ.ID.NO.1所示。
2.由权利要求1所述的α/β水解酶F8A10_20830基因,其特征在于,该基因的核苷酸序列如SEQ.ID.NO.2所示。
3.含有权利要求2所述基因的表达载体,其特征在于,该载体克隆区域核苷酸序列如SEQ.ID.NO.2所示。
4.如权利要求1所述的康氏副球菌(P.kondratievae)α/β水解酶F8A10_20830在水解邻苯二甲酸酯类中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210007833.5A CN115261357A (zh) | 2022-01-06 | 2022-01-06 | 一种康氏副球菌(Paracoccus kondratievae)α/β水解酶F8A10_20830及其基因与应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202210007833.5A CN115261357A (zh) | 2022-01-06 | 2022-01-06 | 一种康氏副球菌(Paracoccus kondratievae)α/β水解酶F8A10_20830及其基因与应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN115261357A true CN115261357A (zh) | 2022-11-01 |
Family
ID=83758507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210007833.5A Pending CN115261357A (zh) | 2022-01-06 | 2022-01-06 | 一种康氏副球菌(Paracoccus kondratievae)α/β水解酶F8A10_20830及其基因与应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN115261357A (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110484479A (zh) * | 2019-09-30 | 2019-11-22 | 北京工商大学 | 一株Paracoccus kondratievae及其在降解白酒有害酯中的应用 |
CN110592049A (zh) * | 2019-09-29 | 2019-12-20 | 北京工商大学 | 一种黑曲霉酯水解酶AnCu3、编码基因及其在水解DEHP中的应用 |
CN110982803A (zh) * | 2019-12-25 | 2020-04-10 | 南京农业大学 | 一种新型邻苯二甲酸酯水解酶EstJ6及其编码基因与应用 |
CN113564142A (zh) * | 2021-06-08 | 2021-10-29 | 北京工商大学 | 伯克霍尔德氏菌酯合成酶、编码基因及其应用 |
-
2022
- 2022-01-06 CN CN202210007833.5A patent/CN115261357A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110592049A (zh) * | 2019-09-29 | 2019-12-20 | 北京工商大学 | 一种黑曲霉酯水解酶AnCu3、编码基因及其在水解DEHP中的应用 |
CN110484479A (zh) * | 2019-09-30 | 2019-11-22 | 北京工商大学 | 一株Paracoccus kondratievae及其在降解白酒有害酯中的应用 |
CN110982803A (zh) * | 2019-12-25 | 2020-04-10 | 南京农业大学 | 一种新型邻苯二甲酸酯水解酶EstJ6及其编码基因与应用 |
CN113564142A (zh) * | 2021-06-08 | 2021-10-29 | 北京工商大学 | 伯克霍尔德氏菌酯合成酶、编码基因及其应用 |
Non-Patent Citations (2)
Title |
---|
XU Y ET AL: "Biodegradation of phthalate esters by Paracoccus kondratievae BJQ0001 isolated from Jiuqu (Baijiu fermentation starter) and identification of the ester bond hydrolysis enzyme" * |
XU等: "GenBank:CP045074.1" * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2807260A1 (en) | Process for oxidizing alkenes employing the pseudomonas putida gpol alkb monooxygenase | |
US12104189B2 (en) | Mutant of nitrile hydratase derived from Caldalkalibacillus thermarum | |
US10294479B2 (en) | Candida carbonyl reductase and method for preparing (R)-lipoic acid precursor | |
US11332731B2 (en) | Nitrile hydratase mutant, genetically engineered bacterium containing mutant and applications thereof | |
CN106244569B (zh) | 一种酯酶EstC10及其编码基因和应用 | |
CN109593702B (zh) | 一种基因工程菌株实现全细胞转化合成l-苯乳酸的方法 | |
CN109371070B (zh) | 一种高产α-酮异戊酸的方法 | |
CN113106082B (zh) | 动物粪便宏基因组来源的丙氨酸消旋酶及其制备和应用 | |
CN111057695B (zh) | 一种腈水解酶及其制备方法和应用 | |
CN111454918B (zh) | 一种烯醇还原酶突变体及其在制备(r)-香茅醛中的应用 | |
CN115261357A (zh) | 一种康氏副球菌(Paracoccus kondratievae)α/β水解酶F8A10_20830及其基因与应用 | |
CN115261342B (zh) | 一种伯克霍尔德氏菌bjq0011来源酯合成酶jfn94_18195、编码基因及其应用 | |
CN106119224B (zh) | 一种酯酶EstP00714及其编码基因和应用 | |
CN110923223B (zh) | 一种新型腈水解酶及其应用 | |
CN108060186B (zh) | 一种对硝基苄醇丙二酸单酯的生物制备方法 | |
CN114196659B (zh) | 酰胺酶突变体、编码基因、工程菌及其应用 | |
WO2007099994A1 (ja) | 新規カルボニル還元酵素、その遺伝子、ベクター、形質転換体、およびそれらを利用した光学活性アルコールの製造方法 | |
CN115851684B (zh) | 一种腈水解酶及其在蛋氨酸合成中的应用 | |
CN109554383B (zh) | 一种耐热的酯酶编码基因、载体、工程菌及其编码蛋白的用途 | |
CN115247144B (zh) | 生产l-苏式-3-羟基天冬氨酸的基因工程菌及其应用 | |
CN109897872A (zh) | 酶法制备(2s,3s)-n-叔丁氧羰基-3-氨基-1-氯-2-羟基-4-苯基丁烷 | |
CN116769757A (zh) | 氨肽酶、突变体、编码基因及其在l-肌肽合成中的应用 | |
CN118620855A (zh) | 一种乙醛脱氢酶的突变体及其制备方法和应用 | |
CN118703576A (zh) | 一种硝基还原酶在轴手性化合物合成中的应用 | |
CN117887686A (zh) | 聚对苯二甲酸乙二醇酯水解酶及其在降解pet制品中的应用 |
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 | ||
WD01 | Invention patent application deemed withdrawn after publication | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20221101 |