JP4769255B2 - Xmpをgmpに転換させることができながら、gmpの分解に関連される遺伝子が不活性化されているエシェリキア菌株及びそれを用いる方法 - Google Patents
Xmpをgmpに転換させることができながら、gmpの分解に関連される遺伝子が不活性化されているエシェリキア菌株及びそれを用いる方法 Download PDFInfo
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- 238000002741 site-directed mutagenesis Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- RCIJACVHOIKRAP-UHFFFAOYSA-N sodium;1,4-dioctoxy-1,4-dioxobutane-2-sulfonic acid Chemical compound [Na+].CCCCCCCCOC(=O)CC(S(O)(=O)=O)C(=O)OCCCCCCCC RCIJACVHOIKRAP-UHFFFAOYSA-N 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 108700026220 vif Genes Proteins 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
- 235000013343 vitamin Nutrition 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
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Description
大腸菌GPU1114(受託番号KCCM-10536)のゲノムDNAを鋳型とし、配列番号1及び2のオリゴヌクレオチドをプライマーとしたPCRによって、deoD遺伝子のオープン・リーディング・フレーム(ORFs)を含むDNA断片、約720bpを増幅した。PCRは、変性を94℃で30秒、アニーリングを50℃で30秒、及びエクステンションを68℃で1分30秒を35サイクル行った。
実施例1から得られた大腸菌DKO-udから抽出されたゲノムDNAを鋳型とし、配列番号3及び4のオリゴヌクレオチドをプライマーとしたPCRによって、aphA遺伝子のORFsを含むDNA断片、約714bpを増幅した。PCRは、変性を94℃で30秒、アニーリングを55℃で30秒、及びエクステンションを68℃で1分30秒を35サイクル行った。
実施例1から得られた大腸菌DKO-udから抽出されたゲノムDNAを鋳型とし、配列番号5及び6のオリゴヌクレオチドをプライマーとしたPCRによって、appA遺伝子のORFsを含むDNA断片、約1.3Kbを増幅した。PCRは、変性を94℃で30秒、アニーリングを55℃で30秒、及びエクステンションを68℃で1分30秒を35サイクル行った。
実施例3から製造された大腸菌QKO-udhpから抽出されたゲノムDNAを鋳型とし、配列番号7及び8のオリゴヌクレオチドをプライマーとしたPCRによって、hprt遺伝子のORFsを含むDNA断片、約1.7Kbを増幅した。PCRは、変性を94℃で30秒、アニーリングを69℃で30秒、及びエクステンションを72℃で1分30秒を30サイクル行った。
本実施例では、実施例4において抗生剤のクロラムフェニコールが含有された固体培地に塗抹して選別された大腸菌QIKOコロニーのうちで、コロニー30株が、表1の培地組成であるGMP生産培地を含む三角フラスコで培養し、GMP生産性を比較した。まず、30の単一コロニーをGMP生産固体培地を含む32℃の培養器で一晩培養した。その後、単一の多数のコロニーを50mlのGMP生産培地に1白金耳ずつ接種して、250rpmで攪拌しながら、37℃で7時間培養した。培養後、細胞培養液内に存在する酵素、基材および生成物の細胞膜透過を促進するために培養液に2%のキシレンを添加した。その培養物を酵素反応液に添加して、250rpmで攪拌しながら42℃で15分間反応させた。HPLC(高速液体クロマトグラフィー)を用いてGMPの濃度を確認し、その結果は表2の通りである。
抗生剤のクロラムフェニコールが含有された固体培地に塗抹して得られる実施例4から選別された大腸菌QIKOコロニーを表1の培地組成であるGMP生産培地を含む三角フラスコで培養した。培養物を表3で示される組成を有するGMP副産物の生成反応液に添加して、反応後の副産物の生成量を観察した。
Claims (6)
- エシェリキア種(Escherichia sp.)GPU1114(受託番号KCCM-10536)の変異株であって、deoD遺伝子(配列番号9)、aphA遺伝子(配列番号10)およびappA遺伝子(配列番号11)が不活性化されたエシェリキア(Escherichia)属微生物である菌株。
- エシェリキア種(Escherichia sp.)QKO-udhp(受託番号KCCM-10632)であることを特徴とする、請求項1に記載の菌株。
- さらにhprt遺伝子(配列番号12)が不活性化されたことを特徴とする、請求項1または2に記載の菌株。
- エシェリキア種(Escherichia sp.)QIKO(受託番号KCCM-10630)であることを特徴とする、請求項3に記載の菌株。
- 前記deoD、aphA、appA及びhprt遺伝子、または前記deoD、aphA及びappAが、それぞれ相同的組み換えに基づいた置換によって不活性化されているものであることを特徴とする、請求項1〜4のいづれか一に記載の菌株。
- 請求項1〜5のいづれか一に記載の菌株を培養する段階を含む、GMPを生産する方法。
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KR10-2005-0005863 | 2005-01-21 | ||
KR1020050005863A KR100664653B1 (ko) | 2005-01-21 | 2005-01-21 | Xmp를 gmp로 전환시킬 수 있으면서도, gmp의분해에 관련되는 유전자가 불활성화되어 있는 대장균변이주 및 그를 이용하는 방법 |
PCT/KR2006/000221 WO2006078132A1 (en) | 2005-01-21 | 2006-01-20 | Escherichia strain capable of converting xmp to gmp and maintaining the inactivated state of gene(s) associated with gmp degradation and methods of using the same |
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KR100686561B1 (ko) * | 2005-11-25 | 2007-02-26 | 씨제이 주식회사 | Gmp 저분해 활성을 갖는 코리네박테리움 암모니아게네스cjxcv19 kccm-10692p 및 변이주의 고속선별방법 |
KR101072720B1 (ko) * | 2008-12-17 | 2011-10-11 | 씨제이제일제당 (주) | 5'-구아닐산 생산능이 향상된 미생물 및 이를 이용한 5'-구아닐산의 생산방법 |
JP5636648B2 (ja) | 2009-08-10 | 2014-12-10 | 味の素株式会社 | 5’−グアニル酸の製造法 |
JP7111878B1 (ja) | 2021-10-27 | 2022-08-02 | 旭化成ファーマ株式会社 | ニコチンアミドモノヌクレオチドの製造方法 |
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WO1999003988A1 (fr) | 1997-07-18 | 1999-01-28 | Ajinomoto Co., Inc. | Procede de production de nucleosides de purine par fermentation |
KR100498897B1 (ko) | 1998-12-16 | 2005-09-12 | 씨제이 주식회사 | 핵산분해능이 약화되고 단백질합성능이 강화된 대장균 변이주 |
EP1170370B1 (en) * | 2000-07-05 | 2006-09-27 | Ajinomoto Co., Inc. | Method for producing nucleotide by fermentation |
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US7741101B2 (en) | 2010-06-22 |
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KR100664653B1 (ko) | 2007-01-04 |
EP1844135A1 (en) | 2007-10-17 |
EP1844135B1 (en) | 2013-12-25 |
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