CN116063420B - 转录因子MrMrl3突变体及其应用 - Google Patents
转录因子MrMrl3突变体及其应用 Download PDFInfo
- Publication number
- CN116063420B CN116063420B CN202211025020.5A CN202211025020A CN116063420B CN 116063420 B CN116063420 B CN 116063420B CN 202211025020 A CN202211025020 A CN 202211025020A CN 116063420 B CN116063420 B CN 116063420B
- Authority
- CN
- China
- Prior art keywords
- mrmrl3
- transcription factor
- mutant
- monascus
- mutated
- 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
- 108091023040 Transcription factor Proteins 0.000 title claims abstract description 32
- 102000040945 Transcription factor Human genes 0.000 title claims abstract description 32
- 241000228347 Monascus <ascomycete fungus> Species 0.000 claims abstract description 43
- CQIUKKVOEOPUDV-IYSWYEEDSA-N antimycin Chemical compound OC1=C(C(O)=O)C(=O)C(C)=C2[C@H](C)[C@@H](C)OC=C21 CQIUKKVOEOPUDV-IYSWYEEDSA-N 0.000 claims abstract description 30
- CQIUKKVOEOPUDV-UHFFFAOYSA-N citrinine Natural products OC1=C(C(O)=O)C(=O)C(C)=C2C(C)C(C)OC=C21 CQIUKKVOEOPUDV-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000049 pigment Substances 0.000 claims abstract description 15
- 244000005700 microbiome Species 0.000 claims abstract description 12
- 230000035772 mutation Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 125000003275 alpha amino acid group Chemical group 0.000 claims abstract description 7
- 239000013612 plasmid Substances 0.000 claims description 12
- 108020004414 DNA Proteins 0.000 claims description 10
- 239000013613 expression plasmid Substances 0.000 claims description 4
- 238000006467 substitution reaction Methods 0.000 claims description 3
- 150000001413 amino acids Chemical class 0.000 claims 1
- 239000002773 nucleotide Substances 0.000 claims 1
- 125000003729 nucleotide group Chemical group 0.000 claims 1
- 108090000623 proteins and genes Proteins 0.000 abstract description 11
- 241000589158 Agrobacterium Species 0.000 abstract description 8
- 238000002744 homologous recombination Methods 0.000 abstract description 2
- 230000006801 homologous recombination Effects 0.000 abstract description 2
- 230000001404 mediated effect Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 10
- 108091028043 Nucleic acid sequence Proteins 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000012258 culturing Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 241000588724 Escherichia coli Species 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 108090000790 Enzymes Proteins 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- GRRNUXAQVGOGFE-UHFFFAOYSA-N Hygromycin-B Natural products OC1C(NC)CC(N)C(O)C1OC1C2OC3(C(C(O)C(O)C(C(N)CO)O3)O)OC2C(O)C(CO)O1 GRRNUXAQVGOGFE-UHFFFAOYSA-N 0.000 description 2
- 241000031003 Monascus ruber Species 0.000 description 2
- 241000228153 Penicillium citrinum Species 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- GRRNUXAQVGOGFE-NZSRVPFOSA-N hygromycin B Chemical compound O[C@@H]1[C@@H](NC)C[C@@H](N)[C@H](O)[C@H]1O[C@H]1[C@H]2O[C@@]3([C@@H]([C@@H](O)[C@@H](O)[C@@H](C(N)CO)O3)O)O[C@H]2[C@@H](O)[C@@H](CO)O1 GRRNUXAQVGOGFE-NZSRVPFOSA-N 0.000 description 2
- 229940097277 hygromycin b Drugs 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
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000001052 yellow pigment Substances 0.000 description 2
- 229920001817 Agar Polymers 0.000 description 1
- 102000012410 DNA Ligases Human genes 0.000 description 1
- 108010061982 DNA Ligases Proteins 0.000 description 1
- 101100168892 Dictyostelium discoideum ctnB gene Proteins 0.000 description 1
- 101100499865 Escherichia coli (strain K12) dpiB gene Proteins 0.000 description 1
- 244000113306 Monascus purpureus Species 0.000 description 1
- 235000002322 Monascus purpureus Nutrition 0.000 description 1
- 101100497514 Monascus purpureus ctnR gene Proteins 0.000 description 1
- 101100496042 Monascus purpureus mpl1 gene Proteins 0.000 description 1
- 101100060080 Monascus purpureus mpl2 gene Proteins 0.000 description 1
- 231100000678 Mycotoxin Toxicity 0.000 description 1
- 101100268898 Streptococcus mutans serotype c (strain ATCC 700610 / UA159) acn gene Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 101150113917 acnA gene Proteins 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000000539 amino acid group Chemical group 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229930195731 calicheamicin Natural products 0.000 description 1
- HXCHCVDVKSCDHU-LULTVBGHSA-N calicheamicin Chemical compound C1[C@H](OC)[C@@H](NCC)CO[C@H]1O[C@H]1[C@H](O[C@@H]2C\3=C(NC(=O)OC)C(=O)C[C@](C/3=C/CSSSC)(O)C#C\C=C/C#C2)O[C@H](C)[C@@H](NO[C@@H]2O[C@H](C)[C@@H](SC(=O)C=3C(=C(OC)C(O[C@H]4[C@@H]([C@H](OC)[C@@H](O)[C@H](C)O4)O)=C(I)C=3C)OC)[C@@H](O)C2)[C@@H]1O HXCHCVDVKSCDHU-LULTVBGHSA-N 0.000 description 1
- 101150021881 citA gene Proteins 0.000 description 1
- 101150074491 citB gene Proteins 0.000 description 1
- 101150027554 citC gene Proteins 0.000 description 1
- 101150087877 citD gene Proteins 0.000 description 1
- 101150005664 citD1 gene Proteins 0.000 description 1
- 101150114648 citP gene Proteins 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 101150102285 ctnA gene Proteins 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 101150118937 dpiA gene Proteins 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000002778 food additive Substances 0.000 description 1
- 235000013373 food additive Nutrition 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 101150118781 icd gene Proteins 0.000 description 1
- 101150044508 key gene Proteins 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229940057059 monascus purpureus Drugs 0.000 description 1
- -1 mrl Proteins 0.000 description 1
- 239000002636 mycotoxin Substances 0.000 description 1
- 239000000974 natural food coloring agent Substances 0.000 description 1
- 231100000417 nephrotoxicity Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000002741 site-directed mutagenesis Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002103 transcriptional effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/37—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from fungi
-
- 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
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/80—Vectors or expression systems specially adapted for eukaryotic hosts for fungi
-
- 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
- C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
- C12P17/18—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms containing at least two hetero rings condensed among themselves or condensed with a common carbocyclic ring system, e.g. rifamycin
- C12P17/181—Heterocyclic compounds containing oxygen atoms as the only ring heteroatoms in the condensed system, e.g. Salinomycin, Septamycin
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/645—Fungi ; Processes using fungi
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Mycology (AREA)
- Physics & Mathematics (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Plant Pathology (AREA)
- Medicinal Chemistry (AREA)
- Gastroenterology & Hepatology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
本发明属于微生物领域,具体涉及转录因子MrMrl3突变体及其应用。具体技术方案为:转录因子突变体MrMrl3,在转录因子MrMrl3基础上突变获得,所述突变至少包括:将第22位Arg突变为Lys,第30位Arg突变为Ile,第35位Asp突变为Lys,将第47位Ser突变为Leu;所述转录因子MrMrl3的氨基酸序列如SEQ ID NO.2所示。本发明将突变体基因MrMrl3通过农杆菌介导的同源重组方法,替换红曲菌基因组中的原始MrMrl3基因,得到突变菌株。突变菌株不仅大幅降低了桔霉素产量,还一定程度上提升了红曲色素的产量。
Description
技术领域
本发明属于微生物领域,具体涉及转录因子MrMrl3突变体及其应用。
背景技术
红曲菌(Monascus spp.,也称红曲霉)能够产生红曲色素,是重要的天然食品着色剂之一。但红曲菌株在产生红曲色素的同时,也会产生一种真菌毒素:桔霉素(也称橘霉素或桔青霉素,citrinin)。桔霉素具有肾脏毒性,会污染红曲菌发酵产品。为此各国制定了相关产品中的桔霉素限量标准,如我国国标GB 1886.66-2015《食品安全国家标准食品添加剂红曲黄色素》规定:红曲黄色素产品中桔霉素的最高限量为1.0mg/kg。
红曲菌中,与桔霉素的生物合成相关的基因至少有16个,其中,转录因子MrMrl3能够调控这些桔霉素生物合成基因的转录表达,从而控制桔霉素的合成与积累,因此转录因子MrMrl3是影响红曲产品中桔霉素含量的关键基因。目前有研究希望通过敲除MrMrl3基因来消除桔霉素的合成,但结果表明这一方法不但不能消除桔霉素,反而还会导致红曲色素产量下降,其中的科学原理尚不清楚。所以,急需找到一种新的方法来降低桔霉素含量且不影响红曲色素产量。
发明内容
本发明的目的是提供转录因子MrMrl3及其应用。
为实现上述发明目的,本发明所采用的技术方案是:转录因子突变体MrMrl3,在转录因子MrMrl3基础上突变获得,所述突变至少包括:将第22位Arg突变为Lys,第30位Arg突变为Ile,第35位Asp突变为Lys,将第47位Ser突变为Leu;所述转录因子MrMrl3的氨基酸序列如SEQ ID NO.2所示。
相应的,转录因子突变体MrMrl3,所述转录因子突变体MrMrl3的氨基酸序列如氨基酸序列如SEQ ID NO.4所示。
相应的,编码所述转录因子突变体MrMrl3的DNA序列。
相应的,编码所述转录因子突变体MrMrl3的DNA序列。
相应的,含有所述转录因子突变体MrMrl3的氨基酸序列的重组质粒。
相应的,含有所述DNA序列的表达质粒。
相应的,含有所述重组质粒或含有所述表达质粒的宿主微生物。
相应的,所述转录因子突变体MrMrl3或所述DNA序列在降低微生物的桔霉素表达量和/或提高微生物的红曲色素表达量中的应用。
优选的,所述微生物为红曲菌。
相应的,一种重组微生物,利用所述转录因子突变体MrMrl3替换原始转录因子MrMrl3。
本发明具有以下有益效果:本发明对MrMrl3中的4个氨基酸残基(22位Arg、30位Arg、35位Asp、47位Ser)分别进行了定点突变,再将突变体基因MrMrl3通过农杆菌介导的同源重组方法,替换红曲菌基因组中的原始MrMrl3基因,得到突变菌株。突变菌株不仅大幅降低了桔霉素产量,还一定程度上提升了红曲色素的产量。
具体实施方式
本发明提供了转录因子MrMrl3突变体,在原始MrMrl3基础上做了如下突变:将第22位Arg突变为Lys,第30位Arg突变为Ile,第35位Asp突变为Lys,将第47位Ser突变为Leu。原始MrMrl3的DNA序列如SEQ ID NO.1所示,其氨基酸序列如SEQ ID NO.2所示。MrMrl3突变体的DNA序列如SEQ ID NO.3所示,其氨基酸序列如SEQ ID NO.4所示。使用ATCC 96218有效降低红曲菌的桔霉素产量。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。若未特别指明,实施例中所用的技术手段为本领域技术人员所熟知的常规手段。
实施例
1、引物1从红曲菌ATCC 96218基因组中通过PCR技术克隆得到MrMrl3的DNA片段。
引物1包括:F:ACAGCTATGACCATGATTACGAATTCATGGCCTCCACCGCAC;R:GTAAAACGACGGCCAGTGCCAAGCTTTCAGTCATTGCAGGGCAGTGA。
将MrMrl3的基因片段与通用质粒pCB301用HindⅢ与EcoRⅠ分别进行双酶切,所得两种酶切产物用DNA浓度测定仪测定浓度,然后按DNA浓度1:1进行混合,在16℃下用T4 DNA连接酶进行酶连,获得酶连产物。利用酶连产物转化大肠杆菌TOP10,将转化菌株通过卡纳霉素抗性平板筛选,能够生长的大肠杆菌菌株包含有正确的重组质粒。培养大肠杆菌菌株后,提取重组质粒。
以重组质粒DNA为模板,利用引物2通过PCR技术进行序列扩增,所得扩增产物转化化大肠杆菌TOP10,挑取大肠杆菌单菌落进行培养,提取重组质粒,测序验证MrMrl3基因上的突变是否正确。正确的突变序列DNA则作为下一次突变的模板DNA。依照该方法,依次对设计的突变位点使用引物3、4、5进行突变,得到含有4个位点突变的重组质粒。
引物2包括:F:GACAACGGACAGGAAAAGCGTGCGAGGAATGCC;R:CATTCCTCGCACGCTTTTCCTGTCCGTTGTCGCT。将第22位的Arg突变为Lys。
引物3包括:F:GAGGAATGCCGGCGAATTAAACTACGCTGTGACGGAC;R:CGTCACAGCGTAGTTTAATTCGCCGGCATTCCTCG。将第30位的Arg突变为Ile。
引物4包括:F:GCAAACTACGCTGTAAAGGACAGCAACCGCGG;R:CCGCGGTTGCTGTCCTTTACAGCGTAGTTTGCGTCG。将第35位的Asp突变为Lys。
引物5包括:F:CGGAGTTTGTGTGGATCTGGGTGTAACCTGCGAGGT;R:CTCGCAGGTTACACCCAGATCCACACAAACTCCGCAC。将第47位的Ser突变为Leu。
2、取5μL重组质粒加入100μL农杆菌EHA105感受态细胞中,将混合物浸入液氮5min,然后在37℃下水浴5min。随后加入800μL的新鲜LB培养基,在28℃、120r/min下温育3h。然后将菌液涂布于含有卡那霉素(50μg/mL)的LB平板上,28℃培养36h,培养至长出单菌落。提取阳性转化子的质粒,通过PCR验证确定正确的重组农杆菌。
3、将红曲菌ATCC 96218接种到CYA培养基斜面上,28℃培养5d。随后用无菌水洗下孢子,得到孢子悬液(5×105个/mL)。将重组农杆菌接种到5mL含卡那霉素(50μg/mL)的液体LB培养基中,28℃、150r/min振荡培养至OD600约为0.8。收集菌体,并用诱导培养基稀释农杆菌至OD600为0.5,再在28℃、150r/min下培养6h,得农杆菌液。诱导培养基组分为:NH4NO30.5g/L,NaCl 0.3g/L,CaCl2·2H2O 0.01g/L,MgSO4·7H2O 0.6g/L,ZnSO4·7H2O 0.5mg/L,Na2-EDTA·2H2O 1.3mg/L。
用所述农杆菌液将所述红曲菌孢子悬液稀释至105个/mL,然后吸取200μL涂布于新的诱导培养基平板(在诱导培养基基础上增加琼脂)上,28℃下培养2d。将长出的单菌落挑至含30mg/L潮霉素B的PDA培养基上。继续在28℃下培养,再挑取生长的单菌落接种到新的含潮霉素B的PDA平板上培养。培养5天后,取单菌落提取基因组,通过PCR的方法使用所述引物1验证突变MrMrl3基因,得到重组红曲菌株M1。
4、将原始红曲菌株ATCC 96218和重组红曲菌株M1分别接种到新鲜PDB培养基中,分别在28℃、120rpm下培养7天。随后分别过滤收集菌丝体,迅速加入液氮冷却后研磨成细粉,加入80%浓度的乙醇溶液,在40℃条件下萃取1小时,然后离心除去沉淀物,获得含有红曲色素和桔霉素的上清液。
对上述各上清液利用HPLC分别测定原始红曲菌株和重组红曲菌株M1产物中红曲色素和桔霉素的浓度。原始红曲菌株提取液中的红曲色素和桔霉素浓度分别为6840U/L和2.3mg/L,重组红曲菌株M1中红曲色素和桔霉素浓度分别为7130U/L和0.3mg/L,桔霉素浓度下降87%,红曲色素产量提高5%。
按上述方法,在10种不同来源的红曲菌中均使用转录因子MrMrl3突变体替代原始MrMrl3,获得10种重组红曲菌株。将各重组红曲菌与其对应原始红曲菌分别在28℃、120rpm下在PDB培养基中培养7天,相同条件下测试红曲色素浓度和桔霉素浓度。结果显示:各重组红曲菌相较于原始菌株,红曲色素浓度上升3%~11%,桔霉素浓度下降79%~93%。
另外,发明人发现:对于其他含有桔霉素的生物合成相关的必需基因(citC、citE、mrl5、citD、MrMrl3/ctnA、citB、citA/ctnB、citS和mrr1)的微生物,按如上方式相应将转录因子MrMrl3替换为转录因子MrMrl3突变体,也可有效降低桔霉素的产量。发明人在桔青霉(Penicillium citrinum)、红色红曲菌(Monascus ruber)和紫色红曲菌(Monascuspurpureus)中进行了相应转录因子替换试验,桔霉素产量均极显著下降(桔霉素浓度下降71%~89%)。
以上所述的实施例仅是对本发明的优选方式进行描述,并非对本发明的范围进行限定,在不脱离本发明设计精神的前提下,本领域普通技术人员对本发明的技术方案做出的各种变形、变型、修改、替换,均应落入本发明权利要求书确定的保护范围内。
Claims (7)
1.转录因子突变体MrMrl3,其特征在于:所述转录因子突变体MrMrl3的氨基酸序列如SEQ ID NO.4所示。
2.编码权利要求1所述转录因子突变体MrMrl3的DNA。
3.含有表达权利要求1所述转录因子突变体MrMrl3对应氨基酸的核苷酸的重组质粒。
4.含有权利要求2所述DNA的表达质粒。
5.含有权利要求3所述重组质粒或含有权利要求4所述表达质粒的宿主微生物。
6.权利要求1所述转录因子突变体MrMrl3或权利要求2所述DNA在降低微生物的桔霉素表达量和/或提高微生物的红曲色素表达量中的应用,其特征在于:所述微生物为红曲菌。
7.一种重组微生物,其特征在于:利用权利要求1所述转录因子突变体MrMrl3替换原始转录因子MrMrl3。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211025020.5A CN116063420B (zh) | 2022-08-25 | 2022-08-25 | 转录因子MrMrl3突变体及其应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211025020.5A CN116063420B (zh) | 2022-08-25 | 2022-08-25 | 转录因子MrMrl3突变体及其应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN116063420A CN116063420A (zh) | 2023-05-05 |
CN116063420B true CN116063420B (zh) | 2024-01-26 |
Family
ID=86175794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202211025020.5A Active CN116063420B (zh) | 2022-08-25 | 2022-08-25 | 转录因子MrMrl3突变体及其应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN116063420B (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008023469A1 (fr) * | 2006-08-25 | 2008-02-28 | Osaka University | Procédé d'identification d'un facteur transcriptionnel induisant la production d'une substance physiologiquement active issue de monascus et son utilisation |
CN103917653A (zh) * | 2011-07-21 | 2014-07-09 | 加利福尼亚大学董事会 | 用于产生纤维素降解酶的转录因子 |
CN113122583A (zh) * | 2021-05-27 | 2021-07-16 | 华中农业大学 | 利用红曲霉与米曲霉共培养提高红曲色素产量的方法 |
CN113308443A (zh) * | 2021-05-27 | 2021-08-27 | 华中农业大学 | 一种红曲霉单加氧酶突变体及其应用 |
-
2022
- 2022-08-25 CN CN202211025020.5A patent/CN116063420B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008023469A1 (fr) * | 2006-08-25 | 2008-02-28 | Osaka University | Procédé d'identification d'un facteur transcriptionnel induisant la production d'une substance physiologiquement active issue de monascus et son utilisation |
CN103917653A (zh) * | 2011-07-21 | 2014-07-09 | 加利福尼亚大学董事会 | 用于产生纤维素降解酶的转录因子 |
CN113122583A (zh) * | 2021-05-27 | 2021-07-16 | 华中农业大学 | 利用红曲霉与米曲霉共培养提高红曲色素产量的方法 |
CN113308443A (zh) * | 2021-05-27 | 2021-08-27 | 华中农业大学 | 一种红曲霉单加氧酶突变体及其应用 |
Non-Patent Citations (7)
Also Published As
Publication number | Publication date |
---|---|
CN116063420A (zh) | 2023-05-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11225675B2 (en) | D-lactate dehydrogenase, engineered strain containing D-lactate dehydrogenase and construction method and use of engineered strain | |
EP2386642B1 (en) | Expression system | |
CN113151127B (zh) | 一种l-高丝氨酸生产菌株及其构建方法和应用 | |
US20120015415A1 (en) | METHOD FOR PRODUCING SUCCINIC ACID USING A YEAST BELONGING TO THE GENUS Yarrowia | |
US20150376654A1 (en) | Recombinant microorganisms with increased tolerance to ethanol | |
CN106947705B (zh) | 低产桔霉素高产红曲黄色素的基因重组紫色红曲霉M-piy菌株及其制备方法和用途 | |
EP3591062A1 (en) | Long-chain dibasic acid with low content of hydroxyl acid impurity and production method thereof | |
KR102109763B1 (ko) | 2,3―부탄디올의 생성능이 증강된 재조합 미생물 및 이를 이용한 2,3―부탄디올의 생산 방법 | |
CN116063420B (zh) | 转录因子MrMrl3突变体及其应用 | |
CN113151135A (zh) | 一种食品安全级枯草芽孢杆菌及其在生产几丁二糖脱乙酰酶中的应用 | |
CN116426455B (zh) | 一种重组大肠杆菌及其构建方法与其在生产3-脱氢莽草酸中的应用 | |
KR101929158B1 (ko) | 5'-크산틸산을 생산하는 미생물 및 이를 이용한 5'-크산틸산의 제조방법 | |
CN111748535B (zh) | 一种丙氨酸脱氢酶突变体及其在发酵生产l-丙氨酸中的应用 | |
CN112725251A (zh) | 一种生产亚精胺的工程菌 | |
CN112375725B (zh) | 一种生产维生素b6的代谢工程菌株及其构建方法与应用 | |
CN110551672B (zh) | 高产反式-4-羟基-l-脯氨酸的大肠杆菌菌株及其构建方法 | |
CN115724926B (zh) | 红曲菌转录因子mrTP5及其应用 | |
KR101551533B1 (ko) | 2,3-부탄디올의 생성능이 증강된 재조합 미생물 및 이를 이용한 2,3-부탄디올의 생산 방법 | |
CN107475140B (zh) | 一株在酸性条件下发酵速度提高的高产普鲁兰酶的重组巴斯德毕赤酵母突变体 | |
CN115716868B (zh) | 转录因子MrPigB突变体及其应用 | |
CN114752543B (zh) | 一种以葡萄糖为底物一步发酵合成2-酮基-l-古龙酸的氧化葡萄糖酸杆菌及应用 | |
CN115851632B (zh) | 一种漆酶突变体及其应用 | |
CN110651037A (zh) | 用于产生有机化合物的方法 | |
CN115011536B (zh) | 一株双厌氧启动子诱导产高光学纯d-乳酸的工程菌及其制备方法与应用 | |
CN110343653B (zh) | 一种敲除大肠杆菌醛脱氢酶基因提高1,2,4-丁三醇产量的方法 |
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 |