JP5164566B2 - フィードバック感受性が変化した組み換え酵素 - Google Patents
フィードバック感受性が変化した組み換え酵素 Download PDFInfo
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- JP5164566B2 JP5164566B2 JP2007512216A JP2007512216A JP5164566B2 JP 5164566 B2 JP5164566 B2 JP 5164566B2 JP 2007512216 A JP2007512216 A JP 2007512216A JP 2007512216 A JP2007512216 A JP 2007512216A JP 5164566 B2 JP5164566 B2 JP 5164566B2
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- methionine
- amino acid
- homoserine
- meta
- adenosylmethionine
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- ZDXPYRJPNDTMRX-UHFFFAOYSA-N glutamine Natural products OC(=O)C(N)CCC(N)=O ZDXPYRJPNDTMRX-UHFFFAOYSA-N 0.000 description 1
- 101150097303 glyA gene Proteins 0.000 description 1
- 101150079604 glyA1 gene Proteins 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 108010071598 homoserine kinase Proteins 0.000 description 1
- 101150033780 ilvB gene Proteins 0.000 description 1
- 101150020087 ilvG gene Proteins 0.000 description 1
- 101150015635 ilvI gene Proteins 0.000 description 1
- 101150003892 ilvM gene Proteins 0.000 description 1
- 101150060643 ilvN gene Proteins 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 125000000741 isoleucyl group Chemical group [H]N([H])C(C(C([H])([H])[H])C([H])([H])C([H])([H])[H])C(=O)O* 0.000 description 1
- 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 1
- 101150109249 lacI gene Proteins 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 125000001909 leucine group Chemical group [H]N(*)C(C(*)=O)C([H])([H])C(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- ZNOVTXRBGFNYRX-ABLWVSNPSA-N levomefolic acid Chemical compound C1NC=2NC(N)=NC(=O)C=2N(C)C1CNC1=CC=C(C(=O)N[C@@H](CCC(O)=O)C(O)=O)C=C1 ZNOVTXRBGFNYRX-ABLWVSNPSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009630 liquid culture Methods 0.000 description 1
- 101150035025 lysC gene Proteins 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 108020004999 messenger RNA Proteins 0.000 description 1
- 101150117293 metC gene Proteins 0.000 description 1
- 101150076375 metR gene Proteins 0.000 description 1
- 230000037353 metabolic pathway Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- PIJWXSSJROBBTA-UHFFFAOYSA-N n-[tert-butyl(dimethyl)silyl]-2,2,2-trifluoroacetamide Chemical compound CC(C)(C)[Si](C)(C)NC(=O)C(F)(F)F PIJWXSSJROBBTA-UHFFFAOYSA-N 0.000 description 1
- 229930027945 nicotinamide-adenine dinucleotide Natural products 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229930029653 phosphoenolpyruvate Natural products 0.000 description 1
- DTBNBXWJWCWCIK-UHFFFAOYSA-N phosphoenolpyruvic acid Chemical compound OC(=O)C(=C)OP(O)(O)=O DTBNBXWJWCWCIK-UHFFFAOYSA-N 0.000 description 1
- 102000030592 phosphoserine aminotransferase Human genes 0.000 description 1
- 108010088694 phosphoserine aminotransferase Proteins 0.000 description 1
- 108010076573 phosphoserine phosphatase Proteins 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 101150060030 poxB gene Proteins 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- KCXFHTAICRTXLI-UHFFFAOYSA-N propane-1-sulfonic acid Chemical compound CCCS(O)(=O)=O KCXFHTAICRTXLI-UHFFFAOYSA-N 0.000 description 1
- 108020001580 protein domains Proteins 0.000 description 1
- 230000006920 protein precipitation Effects 0.000 description 1
- 238000001273 protein sequence alignment Methods 0.000 description 1
- 238000001243 protein synthesis Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 101150100525 pykA gene Proteins 0.000 description 1
- 101150053304 pykF gene Proteins 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000010188 recombinant method Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000022532 regulation of transcription, DNA-dependent Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008844 regulatory mechanism Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 230000003362 replicative effect Effects 0.000 description 1
- 108091008146 restriction endonucleases Proteins 0.000 description 1
- 201000003068 rheumatic fever Diseases 0.000 description 1
- 239000007320 rich medium Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 101150003830 serC gene Proteins 0.000 description 1
- 238000006884 silylation reaction Methods 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 101150031436 sucD gene Proteins 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 125000000185 sucrose group Chemical group 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 150000007970 thio esters Chemical class 0.000 description 1
- 101150072448 thrB gene Proteins 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229940118696 vibrio cholerae Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 108010062110 water dikinase pyruvate Proteins 0.000 description 1
- 101150075229 yjaB gene Proteins 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Images
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- 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
- C12N9/10—Transferases (2.)
- C12N9/1025—Acyltransferases (2.3)
- C12N9/1029—Acyltransferases (2.3) transferring groups other than amino-acyl groups (2.3.1)
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- Engineering & Computer Science (AREA)
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- Biotechnology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
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- Enzymes And Modification Thereof (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Description
野生型酵素と比較して、メチオニン及びS−アデノシルメチオニンに対して減少したフィードバック感受性を示す、本発明に係る改変ホモセリンスクシニルトランスフェラーゼは、野生型配列と比較した場合に少なくとも一つのアミノ酸変異を含む。変異は、好ましくは、ホルミルメチオニンの後の最初のアミノ酸プロリンをナンバー1として数えて、アミノ酸24−30をコードする保存された領域、又は、アミノ酸58−65をコードする領域、又は、アミノ酸292−298をコードする領域から選択される。
−gi|20138683|sp|Q97I29|META Clostridium acetobutylicum ホモセリン−O−スクシニルトランスフェラーゼ
−gi|12230304|sp|Q9PLV2|META Campylobacter jejuni ホモセリン−O−スクシニルトランスフェラーゼ
−gi|12230277|sp|Q9KAK7|META Bacillus halodurans ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138686|sp|Q97PM9|META Streptococcs pneumoniae ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138715|sp|Q9CEC5|META Lactococcus lactis ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138656|sp|Q92L99|META Sinorhizobium melioti ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138618|sp|Q8YBV5|META Brucella melitensis ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20141549|sp|P37413|META Salmonella typhmurium ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138601|sp|Q8X610|META Escherichia coli O157:H7 ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20231004|sp|P07623|META Escherichia coli ホモセリン−O−スクシニルトランスフェラーゼ
−gi|12230285|sp|Q9KRM5|META Vibrio cholerae ホモセリン−O−スクシニルトランスフェラーゼ
−gi|38258142|sp|Q8FWG9|META Brucella melitensis biovar suis ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138631|sp|Q8ZAR4|META Yersinia pestis ホモセリン−O−スクシニルトランスフェラーゼ
−gi|12231010|sp|P54167|META Bacillus subtilis ホモセリン−O−スクシニルトランスフェラーゼ
−gi|12230320|sp|Q9WZY3|META Thermotoga maritima ホモセリン−O−スクシニルトランスフェラーゼ
−gi|20138625|sp|Q8Z1W1|META Salmonella typhi ホモセリン−O−スクシニルトランスフェラーゼ
−>gi|31340217|sp|Q8D937|META Vibrio vulnificus ホモセリン−O−スクシニルトランスフェラーゼ
−gi|31340213|sp|Q87NW7|META Vibrio parahaemolyticus ホモセリン−O−スクシニルトランスフェラーゼ
X1−X2−X3−A−X4−X5−Q
ここで、
X1は、E、D、T、S、L、好ましくはTを表す
X2は、D、S、K、Q、E、A、R、好ましくはSを表す
X3は、R、E、D、好ましくはRを表す
X4は、Y、I、F、A、K、S、V、好ましくはSを表す
X5は、H、S、N、G、T、R、好ましくはGを表す。
X1−X2−X3−P−L−Q−X4−X5
ここで、
X1は、G、A、S、好ましくはSを表す
X2は、N、A、好ましくはNを表す
X3は、S、T、好ましくはSを表す
X4は、V、L、I、好ましくはVを表す
X5は、N、E、H、D、好ましくはDを表す。
X1−Y−Q−X2−T−P−X3
ここで、
X1は、V、I、M、好ましくはVを表す
X2は、E、K、G、I、Q、T、S、好ましくはIを表す
X3は、F、Y、好ましくはYを表す。
>gi|39574954|emb|CAE78795.1| メチオニンアデノシルトランスフェラーゼ Bdellovibrio bacteriovorus HD100]
>gi|45657232|ref|YP_001318.1| s−アデノシルメチオニンシンテターゼ蛋白質 Leptospira interrogans serovar Copenhageni str. Fiocruz L1-130
>gi|28378057|ref|NP_784949.1| メチオニンアデノシルトランスフェラーゼ Lactobacillus plantarum WCFS1
>gi|26453553|dbj|BAC43885.1|s−アデノシルメチオニンシンテターゼ Mycoplasma penetrans
>gi|24212014|sp|Q9K5E4| S−アデノシルメチオニンシンテターゼ Corynebacterium glutamicum
>gi|18145842|dbj|BAB81883.1| S−アデノシルメチオニンシンテターゼ Clostridium perfringens str. 13
>gi|13363290|dbj|BAB37241.1| メチオニンアデノシルトランスフェラーゼ1 Escherichia coli O157:H7
>gi|45443250|ref|NP_994789.1| S−アデノシルメチオニンシンテターゼ Yersinia pestis biovar Mediaevails str. 91001
>gi|44888151|sp|Q7WQX8|METK S−アデノシルメチオニンシンテターゼ Borrelia burgdorferi
>gi|44888141|sp|Q7U4S6| S−アデノシルメチオニンシンテターゼ Synechococcs sp. WH8102
>gi|44888135|sp|Q7MHK6| S−アデノシルメチオニンシンテターゼ Vibrio vulnificus YJ016
>gi|23466330|ref|NP_696933.1| S−アデノシルメチオニンシンテターゼ Bifidobacterium longum NCC2705]
>gi|21219978|ref|NP_625757.1| S−アデノシルメチオニンシンテターゼ Streptomyces coelicolor A3(2)]
>gi|39937076|ref|NP_949352.1| メチオニンS−アデノシルトランスフェラーゼ Rhodopseudomonas palustris CGA009
>gi|16766391|ref|NP_462006.1| メチオニンアデノシルトランスフェラーゼ1 Salmonella typhimurium LT2
>gi|33594910|ref|NP_882553.1| S−アデノシルメチオニンシンテターゼ Bordetella parapertussis 12822
>gi|44888148|sp|Q7VRG5| S−アデノシルメチオニンシンテターゼ Candidatus Blochmannia floridanus
>gi|44888147|sp|Q7VNG7|METK_HAEDU S−アデノシルメチオニンシンテターゼ Haemophilus ducreyi
>gi|44888146|sp|Q7VFY5| S−アデノシルメチオニンシンテターゼ Helicobacter hepaticus
>gi|44888145|sp|Q7VDM7| S−アデノシルメチオニンシンテターゼ Prochlorococcus marinus
>gi|44888142|sp|Q7URU7| S−アデノシルメチオニンシンテターゼ Pirellula spec.
>gi|44888138|sp|Q7NHG0| S−アデノシルメチオニンシンテターゼ Gloeobacter violaceus
>gi|44888137|sp|Q7N119| S−アデノシルメチオニンシンテターゼ Photorhabdus luminescens subsp. laumondii
>gi|44888136|sp|Q7MTQ0| S−アデノシルメチオニンシンテターゼ Porphyromonas gingivalis
>gi|448888136|sp|Q7MTQ0| S−アデノシルメチオニンシンテターゼ Porphyromonas palustris CGA009
>gi|39650934|emb|CAE29457.1| メチオニンS−アデノシルトランスフェラーゼRhodopseudomonas palustris CGA009
>gi|15792421|ref|NP_282244.1| S−アデノシルメチオニンシンテターゼ Campylobacter jejuni subsp. jejuni NCTC 11168
>gi|39574954|cmb|CAE78795.1| メチオニンアデノシルトランスフェラーゼ Bdellovibrio bacteriovorus HD100
>gi|45657232|ref|YP_001318.1| s−アデノシルメチオニンシンテターゼ蛋白質 Leptospira interrogans serovar Copenhageni str. Fiocrus L1-130
>gi|28378057|ref|NP_784949.1| メチオニンアデノシルトランスフェラーゼ Lactobacills plantarum WCFS1
>gi|45600470|gb|AAS69955.1| s−アデノシルメチオニンシンテターゼ蛋白質 Leptospira interrogans serovar Copenhageni str. Fiocrus L1-130
>gi|26453553|dbj|BAC43885.1| S−アデノシルメチオニンシンテターゼ Mycoplasma penetrans
>gi|18145842|dbj|BAB81883.1| S−アデノシルメチオニンシンテターゼ Clostridium perfringens str.13
>gi|13363290|dbj|BAB37241.1| メチオニンアデノシルトランスフェラーゼ1 Escherichia coli O157:H7
>gi|45443250|ref|NP_994789.1| S−アデノシルメチオニンシンテターゼ Yersinia pestis biovar. Mediaevails str. 91001
>gi|44888153|sp|Q8CXS7| S−アデノシルメチオニンシンテターゼ Leptospira interrogans
>gi|44888151|sp|Q7WQX8| S−アデノシルメチオニンシンテターゼ Bordetella bronchiseptica
>gi|44888150|sp|Q7W200| S−アデノシルメチオニンシンテターゼ Bordetella parapertussis
>gi|44888149|sp|Q7VUL5| S−アデノシルメチオニンシンテターゼ Bordetella pertussis
G−E−X1−X2−X3−X4
ここで、
X1は、I、V、L、T、好ましくはIを表す
X2は、T、K、S、R、好ましくはTを表す
X3は、T、S、G、好ましくはTを表す
X4は、S、N、T、K、E、R、P、N、A、好ましくはSを表す。
Q−S−X1−D−I−X2−X3−G−V−X4
ここで、
X1は、P、Q、A、S、好ましくはPを表す
X2は、A、N、Q、S、F、好ましくはNを表す
X3は、V、Q、Y、R、M、N、好ましくはQを表す
X4は、K、D、N、T、S、A、E、好ましくはDを表す。
X1−G−A−G−D−Q−G−X2
ここで、
X1は、Q、A、I、V、E、T、好ましくはQを表す
X2は、L、I、S、V、M、好ましくはLを表す。
X1−I−X2−X3−X4−H−X5−X6
ここで、
X1は、S、P、T、A、好ましくはPを表す
X2は、A、T、W、Y、F、S、N、好ましくはTを表す
X3は、M、Y、L、V、好ましくはYを表す
X4は、S、A、好ましくはAを表す
X5は、K、R、E、D、好ましくはRを表す
X6は、L、I、好ましくはLを表す。
X1−L−X2−X3−D
ここで、
X1は、W、F、Y、V、E、好ましくはWを表す
X2は、R、G、L、K、好ましくはRを表す
X3は、P、L、H、V、好ましくはPを表す。
X1−X2−X3−S−X4−Q−H
ここで、
X1は、V、I、好ましくはVを表す
X2は、V、L、I、好ましくはVを表す
X3は、V、L、I、M、好ましくはLを表す
X4は、T、V、A、S、H、好ましくはTを表す。
X1−N−P−X2−G−X3−F
ここで、
X1は、I、V、好ましくはIを表す
X2は、T、G、S、好ましくはTを表す
X3は、R、T、Q、K、S、好ましくはRを表す。
X1−X2−G−X3−P−X4−X5
ここで、
X1は、T、V、I、Y、E、好ましくはVを表す
X2は、V、I、L、N、好ましくはIを表す
X3は、G、S、好ましくはGを表す
X4は、M、I、Q、A、H、D、好ましくはMを表す
X5は、G、S、A、H、好ましくはGを表す。
X1−X2−D−T−Y−G−G
ここで、
X1は、M、I、好ましくはIを表す
X2は、V、I、好ましくはIを表す。
K−V−D−R−S−X1−X2
ここで、
X1は、A、G、好ましくはAを表す
X2は、A、S、L、好ましくはAを表す。
X1−X2−Q−X3−X4−Y−A−I−G−X5−X6
ここで、
X1は、L、E、I、Q、T、好ましくはEを表す
X2は、V、I、L、好ましくはIを表す
X3は、V、L、I、好ましくはVを表す
X4は、A、S、好ましくはSを表す
X5は、V、I、R、K、A、好ましくはVを表す
X6は、A、V、T、S、好ましくはAを表す。
P−I−T−Y−A−Y−R−L、
L−I−T−Y−A−H−R−L、
L−I−T−Y−A−Y−R−L。
V−V−L−S−T−Q−Y
V−D−L−S−T−Q−H
V−D−L−S−T−Q−Y。
遺伝子 genebank登録名
ackA g1788633 酢酸キナーゼ
pta g1788635 ホスホトランスアセチラーゼ
acs g1790505 酢酸シンターゼ
aceA g1790445 イソクエン酸リアーゼ
aceB g1790444 リンゴ酸シンターゼ
aceE g1786304 ピルビン酸デヒドロゲナーゼE1
aceF g1786305 ピルビン酸デヒドロゲナーゼE2
lpd g1786307 ピルビン酸デヒドロゲナーゼE3
aceK g1790446 イソクエン酸デヒドロゲナーゼキナーゼ/ホスファターゼ
sucC g1786948 スクシニルCoAシンテターゼ、ベータサブユニット
sucD g1786949 スクシニルCoAシンテターゼ、アルファサブユニット
ppc g1790393 ホスホエノールピルビン酸カルボキシラーゼ
pck g1789807 ホスホエノールピルビン酸カルボキシキナーゼ
pykA g1788160 ピルビン酸キナーゼII
pykF g1787965 ピルビン酸キナーゼI
poxB g1787096 ピルビン酸オキシダーゼ
pps g1787994 ホスホエノールピルビン酸シンターゼ
ilvB g1790104 アセトヒドロキシ酸シンターゼI、大サブユニット
ilvN g1790103 アセトヒドロキシ酸シンターゼI、小サブユニット
ilvG g1790202 アセトヒドロキシ酸シンターゼII、大サブユニット
g1790203
ilvM g1790204 アセトヒドロキシ酸シンターゼII、小サブユニット
ilvI g1786265 アセトヒドロキシ酸シンターゼIII、大サブユニット
ilvH g1786266 アセトヒドロキシ酸シンターゼIII、小サブユニット
aroF g1788953 DAHPシンテターゼ
aroG g1786969 DAHPシンテターゼ
aroH g1787996 DAHPシンテターゼ
aspC g1787159 アスパラギン酸アミノトランスフェラーゼ
CysA g1788761 硫酸ペルメアーゼ
CysU g1788764 システイン輸送系
CysW g1788762 膜結合硫酸輸送系
CysZ g1788753 cysKのORF上流
cysN g1789108 ATPスルフリラーゼ
cysD g1789109 硫酸アデニルトランスフェラーゼ
cysC g1789107 アデニリル硫酸キナーゼ
cysH g1789121 アデニリル硫酸リダクターゼ
cysI g1789122 亜硫酸リダクターゼ、アルファサブユニット
cysJ g1789123 亜硫酸リダクターゼ、ベータサブユニット
cysE g1790035 セリンアセチルトランスフェラーゼ
cysK g1788754 システインシンターゼ
cysM g2367138 O−アセチル−スルフヒドロラーゼ
serA g1789279 ホスホグリセリン酸デヒドロゲナーゼ
serB g1790849 ホスホセリンホスファターゼ
serC g1787136 ホスホセリンアミノトランスフェラーゼ
glyA g1788902 セリンヒドロキシメチルトランスフェラーゼ
metF g1790377 5,10−メチレンテトラヒドロ葉酸レダクターゼ
metB g1790375 シスタチオニンガンマ−シンターゼ
metC g1789383 シスタチオニンベータ−リアーゼ
metH g1790450 B12依存性ホモシステイン−N5−メチルテトラヒドロ葉酸トランスメチラーゼ
metE g2367304 テトラヒドロプテロイルトリグルタミン酸メチルトランスフェラーゼ
metF g1790377 5,10−メチレンテトラヒドロ葉酸レダクターゼ
metR g1790262 metE及びmetH並びに自己制御のための正の制御遺伝子
speD g1786311 S−アデノシルメチオニンデカルボキシラーゼ
spec g1789337 オルニチンデカルボキシラーゼ
thrB g1786184 ホモセリンキナーゼ
astA g1788043 アルギニンスクシニルトランスフェラーゼ
dapA g1788823 ジヒドロキシジピコリネートシンターゼ
メチオニン及びS−アデノシルメチオニンに対して減少したフィードバック感受性を示すホモセリントランススクシニラーゼを含有するE.コリ変異体の単離
α−メチルメチオニンは、メチオニンの増殖阻害アナログであり、非常に低濃度でE.コリの増殖率に即効性の効果を生じる(最小阻害濃度は1μg/mlで、最大限の阻害のための最小濃度は5μg/mlである。Rowbury et al., 1968)。アナログは、ホモセリントランススクシニラーゼのフィードバック阻害においてメチオニンを擬態し、代謝されないことで蛋白質合成を妨害することができる。変異株のみがアナログを含む培地中で増殖することができる。
LB培地中での培養後、4mg/mlのα−メチルメチオニン上で増殖した4つのコロニーからゲノムDNAを調製した。細胞ペレットを滅菌水で1回洗浄し、30μlの滅菌水で再懸濁した。細胞を95℃で5分間加熱することで破壊し、細片をペレットにした。metA遺伝子を、Taqポリメラーゼ及び以下のプライマーを使用して、PCR増幅した:
ホモセリントランススクシニラーゼの活性がin vitroで決定された。野生型又は変異体酵素を保有するE.コリ株を、2.5g/lのグルコースを含む富栄養培地で培養し、後期対数増殖期にて回収した。細胞を冷たいリン酸カリウム緩衝液で懸濁し、氷上でソニケートした(Branson sonifier, 70W)。遠心後、上清中に含まれる蛋白質を定量した(Bradford, 1976)。
減少した活性を有するS−アデノシルメチオニンシンテターゼ酵素を含有するE.コリ変異体の単離
ノルロイシンはメチオニンの増殖阻害アナログである。より高濃度(50mg/l)では、変異体のみがアナログを含む培地で増殖することができる。このような変異の大部分は、metK及びmetJ遺伝子座に位置する。
ゲノムDNAを、LB液体培地中で増殖した培養物から調製した。細胞ペレットを滅菌水で1回洗浄し、30μlの滅菌水で再懸濁した。細胞を95℃で5分間加熱することで破壊し、細片を抽出した。
S−アデノシルメチオニンシンテターゼ活性がin vitroで決定された。野生型又は変異体酵素を保有するE.コリ株を、5g/lのグルコースを含む最小培地中で培養し、後期対数増殖期にて回収した。細胞を冷たいリン酸カリウム緩衝液で再懸濁し、氷上でソニケーションした(Branson sonifier, 70W)。遠心後、上清中に含まれる蛋白質を定量した(Bradford, 1976)。
変化したホモセリントランススクシニラーゼ及びメチオニン生合成経路の他の酵素の過剰発現によるO−スクシニルホモセリン又はメチオニンの生産のためのE.コリ株の構築
次の2つのオリゴヌクレオチドを用いた:
−32塩基のMetLF(配列番号7):
−遺伝子metLの配列(4127415-4127441)に相同的な領域(小文字)(配列4127415-4129847、ウェブサイトhttp://genolist.pasteur.fr/Colibri/上の配列を参照)
−酵素BspHI(下線)のための制限部位を形成するmetLに関連した配列とともにある領域(大文字)、
−38塩基のMetBLAR(配列番号8):
−遺伝子metLの配列(4129894-4129866)に相同的な領域(小文字)
−HindIII制限部位を内有する領域(大文字)
100塩基のDmetJF(配列番号9):
−遺伝子metJの配列(4126216-4126137)に相同的な領域(小文字)(配列4125658-4125975、ウェブサイトhttp://genolist.pasteur.fr/Colibri/上の配列を参照),
−クロラムフェニコール耐性カセットの増幅のための領域(大文字)(Datsenko, K.A. & Wanner, B.L., 2000. PNAS, 97: 6640-6645の配列を参照)、
−100塩基のDmetJR(配列番号10):
−遺伝子metJの配列(4125596-4125675)と相同的な領域(小文字)
−クロラムフェニコール耐性カセットの増幅のための領域(大文字)
さらに減少したフィードバック感受性を有する酵素を発現するホモセリンスクシニルトランスフェラーゼ対立遺伝子の構築
−49塩基のMetA-Ncol(配列番号13):
−遺伝子metAの配列(4211862-4211892)に相同的な領域(小文字)(配列4211859-4212788、ウェブサイトhttp://genolist.pasteur.fr/Colibri/上の配列を参照)、
−酵素NcoIのための制限部位(下線)を形成するmetAに関連した配列とともにある領域(大文字)
−47塩基のMetA-EcoRI(配列番号14):
−遺伝子metAの配列(4212804-42127774)に相同的な領域(小文字)
−制限部位EcoRIを内有する領域(大文字)
MetAF(配列番号3)及びMetAR(配列番号4)
フィードバック耐性MetA対立遺伝子を減少した活性を有するMetK対立遺伝子と組み合わせることによるO−スクシニルホモセリン又はメチオニンの生産のためのE.コリ株の構築
−100塩基のDMetKFscr(配列番号25):
−metKとgalPの間の領域の配列に相同的な領域(小文字)(配列3085964-3086043、ウェブサイトhttp://genolist.pasteur.fr/Colibri/上の配列を参照)、
−カナマイシン耐性カセットの増幅のための領域(大文字)(Datsenko, K,A. & Wanner, B.L., 2000, PNAS, 97: 6640-6645の配列を参照)、
−100塩基のDmetKRscr(配列番号26):
−遺伝子metKとgalPの間の領域に相同的な領域(小文字)(配列3086162-3086083)、
−カナマイシン耐性カセットの増幅のための領域(大文字)、
−10mlのLB+Km 50μg/ml+グルコース 0.2%+CaCl2 5mMへの株MG1655(metK, Km)終夜培養物100μlの植菌
−振盪しながら37℃で30分間培養
−野生株MG1655で調製されたファージライセートP1 100μlの添加(約1.109ファージ/ml)
−全ての細胞が溶解するまで3時間37℃で振盪
−200μlのクロロホルムの添加及び攪拌
−細胞細片を除去するために、4500gで10分間遠心
−滅菌チューブへ上清を移し、200μlのクロロホルムを添加
−ライセートを4℃で保存
−LB培地中の株MG1655 ΔmetJ metA*11 pTRCmetLの終夜培養物5mlを1500gで10分間遠心
−2.5mlの10mM MgSO4、5mM CaCl2に細胞ペレットを懸濁
−対照チューブ:100μl細胞
株MG1655(ΔmetK, Km)のファージP1100μl
−試験チューブ:100μl 細胞+株MG1655(ΔmetK, Km)のファージP1 100μl
−振盪せずに30℃で30分間インキュベーション
−各チューブに1Mクエン酸ナトリウム100μl添加及び攪拌
−LB1mlの添加
−振盪しながら37℃で1時間培養
−7000rpmで3分間チューブを遠心した後、ディッシュLB+Km50μg/ml上に塗布
−37℃で終夜培養
次いで、カナマイシン耐性変異体を選択し、(metK, Km)を含む領域の挿入をオリゴヌクレオチドMetKFscr及びMetKRscrを用いてPCR解析により確認する。保持している株をMG1655ΔmetJ metA*11 pTRCmetL metK*と命名する。
E.コリ生産株の発酵及び産生の解析
Claims (13)
- ホモセリントランススクシニラーゼによりL−ホモセリンがO−スクシニルホモセリンに変換される微生物を用いた発酵プロセス中で、メチオニン、その前駆体又はそれらに由来する生成物を調製するための方法であって、前記微生物を適切な培地で培養し、一旦生産されたメチオニン、その前駆体又はそれらに由来する生成物を回収する工程を含み、該ホモセリントランススクシニラーゼが、フィードバック阻害剤であるS−アデノシルメチオニン及びメチオニンに対して減少した感受性を有する変異ホモセリントランススクシニラーゼであり、配列番号1に示される配列と少なくとも90%の同一性を有する配列を含み、前記配列において63位の保存的アミノ酸L及び/又は64位のQが他のアミノ酸に置換されている、方法。
- 変異ホモセリントランススクシニラーゼが、少なくとも1つの以下の変異又はその組み合わせを含む、請求項1記載の方法:
63位の保存的アミノ酸Lがフェニルアラニンによって置換されており、且つ/又は64位のQがグルタミン酸若しくはアスパラギン酸に置換されている。 - 59〜66位の領域がS−N−S−P−F−Q−V−D、S−N−S−P−F−E−V−D、S−N−S−P−F−D−V−D、S−N−S−P−L−E−V−D及びS−N−S−P−L−D−V−Dの中から選択されるアミノ酸配列を含む、請求項2記載の方法。
- 微生物が、減少したS−アデノシルメチオニンシンテターゼ酵素活性を有するS−アデノシルメチオニンシンテターゼ酵素を含み、該改変S−アデノシルメチオニンシンテターゼが、配列番号2に示される配列と少なくとも90%の同一性を有する配列であって、下記に特定された少なくとも1つのアミノ酸変異又は変異の組み合わせを含有する配列を含む、請求項1〜3のいずれか1つに記載の方法:H190Y、S274F、T228I、G116S、G106S、H143Y、R162C及びP236S、S60N及びG106S、P138L、G254D。
- 前記配列において、変異ホモセリントランススクシニラーゼが、別の点変異である28位のアミノ酸Aのバリンによる置換を含む、請求項1記載の方法。
- 改変微生物が、原核生物及び真核生物の中から選ばれる、請求項1〜5のいずれか1つに記載の方法。
- 請求項1〜3又は5のいずれか1つに定義された、フィードバック阻害剤であるS−アデノシルメチオニン及びメチオニンに対して減少した感受性を有する変異型ホモセリントランススクシニラーゼ。
- 請求項7に定義された、フィードバック阻害剤であるS−アデノシルメチオニン及びメチオニンに対して減少した感受性を有する変異型ホモセリントランススクシニラーゼをコードするDNA断片。
- 請求項8のDNA断片を含む微生物。
- 微生物が、原核生物及び真核生物の中から選ばれる、請求項9に記載の微生物。
- アスパルトキナーゼ/ホモセリンデヒドロゲナーゼをコードする遺伝子が過剰発現しており、且つ/又は、メチオニンリプレッサーmetJをコードする遺伝子が欠失している、請求項9又は10に記載の微生物。
- アスパルトキナーゼ/ホモセリンデヒドロゲナーゼがフィードバックを調節解除されたthrA対立遺伝子によりコードされている、請求項9〜11のいずれか1つに記載の微生物。
- ThrA酵素が変異Phe318Serによってフィードバック調節解除されている、請求項12記載の微生物。
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| US10329591B2 (en) | 2014-09-01 | 2019-06-25 | Evonik Degussa Gmbh | Method and microorganism for methionine production by fermentation with improved methionine efflux |
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| BR112018002048A2 (pt) | 2015-08-07 | 2018-09-18 | Evonik Degussa Gmbh | ?micro-organismo geneticamente modificado e método para a produção fermentativa de metionina? |
| KR102771842B1 (ko) | 2015-11-27 | 2025-02-21 | 에보닉 오퍼레이션스 게엠베하 | L-메티오닌을 제조하는 방법 |
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| EP3481850A1 (en) | 2016-07-08 | 2019-05-15 | Evonik Degussa GmbH | Method for the fermentative production of methionine or its hydroxy analog form by microorganisms comprising genes coding sugar phosphotransferase system (pts) |
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| CN117511904A (zh) * | 2022-11-11 | 2024-02-06 | 山东理工大学 | 一种基于251位点的s-腺苷蛋氨酸合成酶突变体及其应用 |
| CN121320297B (zh) * | 2025-12-18 | 2026-04-21 | 鲁东大学 | 高丝氨酸-o-琥珀酰转移酶突变体及其应用 |
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|---|---|---|---|---|
| JP4110641B2 (ja) * | 1998-11-17 | 2008-07-02 | 味の素株式会社 | 発酵法によるl−メチオニンの製造法 |
| JP4622111B2 (ja) * | 2001-02-09 | 2011-02-02 | 味の素株式会社 | L−システイン生産菌及びl−システインの製造法 |
| DE10247437A1 (de) * | 2002-10-11 | 2004-04-29 | Consortium für elektrochemische Industrie GmbH | Feedback-resistente Homoserin-Transsuccinylasen |
| DE10249642A1 (de) * | 2002-10-24 | 2004-05-13 | Consortium für elektrochemische Industrie GmbH | Feedback-resistente Homoserin-Transsuccinylasen mit modifiziertem C-Terminus |
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| US8795990B2 (en) | 2014-08-05 |
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| EP1747269B1 (en) | 2015-03-25 |
| EP1747269A2 (en) | 2007-01-31 |
| MXPA06013125A (es) | 2007-02-14 |
| JP2007536921A (ja) | 2007-12-20 |
| CN1954067A (zh) | 2007-04-25 |
| CN1954067B (zh) | 2011-08-03 |
| US20090029424A1 (en) | 2009-01-29 |
| PL1747269T3 (pl) | 2015-08-31 |
| WO2005108561A3 (en) | 2006-07-20 |
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