JP2010503395A - L−リジン生産能の向上したコリネバクテリウム属およびそれを用いたl−リジン生産方法 - Google Patents
L−リジン生産能の向上したコリネバクテリウム属およびそれを用いたl−リジン生産方法 Download PDFInfo
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- JP2010503395A JP2010503395A JP2009528183A JP2009528183A JP2010503395A JP 2010503395 A JP2010503395 A JP 2010503395A JP 2009528183 A JP2009528183 A JP 2009528183A JP 2009528183 A JP2009528183 A JP 2009528183A JP 2010503395 A JP2010503395 A JP 2010503395A
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- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
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- 150000007514 bases Chemical class 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 1
- 229960002079 calcium pantothenate Drugs 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
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- 238000004520 electroporation Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
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- 235000013312 flour Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
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- 235000013882 gravy Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- 230000005764 inhibitory process Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
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- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 101150066555 lacZ gene Proteins 0.000 description 1
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- 235000005985 organic acids Nutrition 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 229920001522 polyglycol ester Polymers 0.000 description 1
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- 238000005215 recombination Methods 0.000 description 1
- 238000011218 seed culture Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
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- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
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- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WPLOVIFNBMNBPD-ATHMIXSHSA-N subtilin Chemical compound CC1SCC(NC2=O)C(=O)NC(CC(N)=O)C(=O)NC(C(=O)NC(CCCCN)C(=O)NC(C(C)CC)C(=O)NC(=C)C(=O)NC(CCCCN)C(O)=O)CSC(C)C2NC(=O)C(CC(C)C)NC(=O)C1NC(=O)C(CCC(N)=O)NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C1NC(=O)C(=C/C)/NC(=O)C(CCC(N)=O)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)CNC(=O)C(NC(=O)C(NC(=O)C2NC(=O)CNC(=O)C3CCCN3C(=O)C(NC(=O)C3NC(=O)C(CC(C)C)NC(=O)C(=C)NC(=O)C(CCC(O)=O)NC(=O)C(NC(=O)C(CCCCN)NC(=O)C(N)CC=4C5=CC=CC=C5NC=4)CSC3)C(C)SC2)C(C)C)C(C)SC1)CC1=CC=CC=C1 WPLOVIFNBMNBPD-ATHMIXSHSA-N 0.000 description 1
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- 229940088594 vitamin Drugs 0.000 description 1
- 229930003231 vitamin Natural products 0.000 description 1
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Abstract
Description
技術的課題
本発明の目的は、リジン生合成経路に関与する6種の酵素、すなわちアスパラギン酸アミノトランスフェラーゼ、アスパラギン酸キナーゼ、アスパラギン酸セミアルデヒドデヒドロゲナーゼ、ジヒドロジピコリン酸シンターゼ、ジヒドロピコリン酸リダクターゼ、およびジアミノピメリン酸デカルボキシラーゼの活性が内在性活性より増加しているコリネバクテリウム属の株を提供することにある。
上記目的を達成するために、本発明は、アスパラギン酸アミノトランスフェラーゼ、アスパラギン酸キナーゼ、アスパラギン酸セミアルデヒドデヒドロゲナーゼ、ジヒドロジピコリン酸シンターゼ、ジヒドロピコリン酸リダクターゼ、およびジアミノピメリン酸デカルボキシラーゼの活性がそれぞれの内在性活性より増加しているコリネバクテリウム属の株を提供する。
本発明のコリネバクテリウム属微生物は、アスパラギン酸アミノトランスフェラーゼ、アスパラギン酸キナーゼ、アスパラギン酸セミアルデヒドデヒドロゲナーゼ、ジヒドロジピコリン酸シンターゼ、ジヒドロピコリン酸リダクターゼおよびジアミノピメリン酸デカルボキシラーゼ、そしてさらにピルビン酸カルボキシラーゼの内在性活性よりも高い酵素活性を有するので、L−リジン生産能を高収率で産生することができる。
本実施例では、大腸菌(E. coli)クローニング用ベクターpACYC177(New England biolab、GenBank accetion # X06402)を基本ベクターとして使用し、コリネバクテリウム属の染色体を運ぶための組み換えベクターpDZを構築した。その製作過程は次のとおりである。
リジン生合成経路に関係する複数の遺伝子が挿入された菌株は、S−(2−アミノエチル)システイン(以下「AEC」という)に対する耐性およびホモセリン漏れ(homoserine leaky)の特徴を有するコリネバクテリウムグルタミカム(KFCC−10881)をベースとした。
[最小培地(pH7.0)]
ブドウ糖 100g、(NH4)2SO4 40g、大豆タンパク質 2.5g、コーンスティープソリッド(Corn Steep Solids) 5g、尿素 3g、KH2PO4 1g、MgSO47H2O 0.5g、ビオチン 100μg、チアミン塩酸塩 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 3000μg、CaCO3 30g(蒸留水1L基準)
[生産培地(pH7.0)]
ブドウ糖 100g、(NH4)2SO4 40g、大豆タンパク質 2.5g、コーンスティープソリッド(Corn Steep Solids) 5g、尿素 3g、KH2PO4 1g、MgSO47H2O 0.5g、ビオチン 100μg、チアミン塩酸塩 1000μg、CaCO3 30g(蒸留水1L基準)。
本実施例では、実施例2で調製したリジン生産コリネバクテリウムグルタミカム KFCC−10881の核DNAを鋳型として用い、リジン生合成経路に関与するaspB遺伝子に対してPCRを行った。米国国立保健院の遺伝子銀行(NIH GenBank)のデータからaspB遺伝子の塩基配列情報(NCBI登録番号 NC_003450、Ncgl0237)を得て、これを使用して2組のプライマーを設計し、プロモーター領域から終止コドンにわたるaspB遺伝子を増幅させた(表2)。
実施例3と同様の方法で、lysC/asd遺伝子の塩基配列の情報(NCBI登録番号 NC_003450、Ncgl0247〜0248)をNIH GenBankのデータから得て、これを用いて2組のプライマーを設計し、aspB遺伝子をプロモーター領域から終止コドンの範囲まで増幅した(表4)。
dapA/dapB遺伝子の塩基配列情報(NCBI登録番号 NC_003450、Ncgl1896〜1898)をNIH GenBankのデータから得た。dapA遺伝子は、dapB遺伝子とオペロンを含み、それらの間には機能が解明されていないORF(Ncgl1987)があることが確認された。この情報を用いて2組のプライマーを設計し、dapBプロモーターから終止コドンにおよぶdapB−ORF(Ncgl1897)−dapA遺伝子全体を増幅した(表6)。
lysA遺伝子の塩基配列情報(NCBI登録番号 NC_003450、Ncgl1132〜1133)をNIH GenBankのデータから得た。lysA遺伝子を分析すると、argS遺伝子(arginyl−tRNAシンテターゼ)とオペロンを含んでいた。この情報を使用して、argSのプロモーターから終止コドンにおよびargS−lysA遺伝子全体を増幅するための2組のプライマーを設計した(表8)。
実施例3と同様一の方法で、pyc遺伝子の塩基配列情報(NCBI登録番号NC_003450、Ncgl0659)をNIH GenBankのデータから得て、これを用いて2組のプライマーを設計し、プロモーター領域から終止コドンにおよぶpyc遺伝子を増幅した(表10)。
それぞれ実施例6と実施例7で調製した、L−リジン生産菌株であるコリネバクテリアグルタミカム KFCC−10881−CJ4とKFCC−10881−CJ5を、L−リジンの生産のために、下記の方法で培養した。
[種培地(pH7.0)]
グルコース 20g、ペプトン 10g、酵母抽出物 5g、尿素 1.5g、KH2PO4 4g、K2HPO4 8g、MgSO47H2O 0.5g、ビオチン 100μg、チアミンHCl 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 2000μg(蒸留水1L基準)
[生産培地(pH7.0)]
ブドウ糖 100g、(NH4)2SO4 40g、大豆タンパク質 2.5g、コーンスティープソリッド 5g、尿素 3g、KH2PO4 1g、MgSO47H2O 0.5g、ビオチン 100μg、チアミン塩酸塩 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 3000μg、CaCO3 30g(蒸留水1L基準)。
実施例4で調製した組換えベクターpDZ−2lysC/asdを、実施例6で調製したリジン生産コリネバクテリウムグルタミカムKFCC10881−CJ4に形質転換し、交叉過程を経て核DNA上で隣接する2コピーのlysC/asd遺伝子のすぐ隣に1コピーのlysC/asd遺伝子をさらに挿入して、3コピーのlysC/asd遺伝子を有するリジン生産菌株を作製し、この株をコリネバクテリウムグルタミカム KFCC10881−CJ6と名付けた。3コピーのlysC/asd遺伝子が連続して整列していることは、3コピーのlysC/asd遺伝子のなかの連結領域を増幅することが可能なプライマーのセット(表13)を用いたPCRによって最終確認した。
実施例5で調製した組換えベクターpDZ−2dapA/dapBを、実施例9で調製したリジン生産コリネバクテリウムグルタミカム KFCC10881−CJ6に形質転換し、交差過程を経て核DNA上で隣接する2コピーのdapA/dapB遺伝子のすぐ隣に1コピーのdapA/dapB遺伝子をさらに挿入して、3コピーのdapA/dapB遺伝子を有するリジン生産菌株を作製し、この株をコリネバクテリウムグルタミカム KFCC10881−CJ7と名付けた。3コピーのdapA/dapB遺伝子が連続して整列していることは、3コピーのdapA/dapB遺伝子のなかの連結領域を増幅することが可能なプライマーのセット(表15)を用いたPCRによって最終確認した。
実施例10で調製したL−リジン生産菌株としてのコリネバクテリウムグルタミカム KFCC−10881−CJ7を、L−リジンの生産のために、下記の方法で培養した。
[種培地(pH7.0)]
グルコース 20g、ペプトン 10g、酵母抽出物 5g、尿素 1.5g、KH2PO4 4g、K2HPO4 8g、MgSO47H2O 0.5g、ビオチン 100μg、チアミンHCl 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 2000μg(蒸留水1L基準)
[生産培地(pH7.0)]
ブドウ糖 100g、(NH4)2SO4 40g、大豆タンパク質 2.5g、コーンスティープソリッド 5g、尿素 3g、KH2PO4 1g、MgSO47H2O 0.5g、ビオチン 100μg、チアミン塩酸塩 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 3000μg、CaCO3 30g(蒸留水1L基準)。
本実施例では、pDZを基本ベクターとして使用し、リジン生合成遺伝子の固有のプロモーターを外来の強力なCJ7プロモーターで置換した。CJ7プロモーターは、配列番号44〜50に示される塩基配列を有するコリネバクテリウムアンモニアゲネス由来の強力なプロモーターであって、本出願人に対して許可された韓国特許第0620092号において開示されている。コリネバクテリウムグルタミカム KFCC−10881の核lysCをCJ7プロモーターの存在下で発現させた場合、固有プロモーターを用いたときよりアスパラギン酸キナーゼの活性が約2倍程度増加することを確認した。
L−リジン生産菌株であるコリネバクテリウムグルタミカム KFCC−10881−PCJ7−5とKFCC−10881−PCJ7−6を、L−リジンの生産のために、下記の方法によって培養した。
[種培地(pH7.0)]
グルコース 20g、ペプトン 10g、酵母抽出物 5g、尿素 1.5g、KH2PO4 4g、K2HPO4 8g、MgSO47H2O 0.5g、ビオチン 100μg、チアミンHCl 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 2000μg(蒸留水1L基準)
[生産培地(pH7.0)]
ブドウ糖 100g、(NH4)2SO4 40g、大豆タンパク質 2.5g、コーンスティープソリッド 5g、尿素 3g、KH2PO4 1g、MgSO47H2O 0.5g、ビオチン 100μg、チアミン塩酸塩 1000μg、パントテン酸カルシウム 2000μg、ニコチンアミド 3000μg、CaCO3 30g(蒸留水1L基準)。
実施例6、実施例10および実施例12でそれぞれ調製した、L−リジン生産菌株であるコリネバクテリウムグルタミカム KFCC10881−CJ4、KFCC10881−CJ7およびKFCC−10881−PCJ7−5を、リジン生合成酵素の代表として、酵素活性の測定が比較的容易なアスパラギン酸キナーゼとジアミノピメリン酸デカルボキシラーゼの活性についてアッセイした。この改変されたリジン産生菌株は、アスパラギン酸キナーゼの活性はPechere J−FとCapony J−Pの測定法(Anal Biochem 22:536-539, 1968)によって測定し、ジアミノピメリン酸デカルボキシラーゼの活性はJ.Cremerなどの測定法によって測定した結果、最初の母菌株であるKFCC10881に比べて酵素活性が増加したことを確認した(表19)。
Claims (15)
- アスパラギン酸アミノトランスフェラーゼ、アスパラギン酸キナーゼ、アスパラギン酸セミアルデヒドデヒドロゲナーゼ、ジヒドロジピコリン酸シンターゼ、ジヒドロピコリン酸リダクターゼ、およびジアミノピメリン酸デカルボキシラーゼの酵素活性がそれぞれの内在性活性と比較して増加した、コリネバクテリウム属微生物。
- 前記微生物は、さらにピルビン酸カルボキシラーゼの酵素活性が内在性活性と比較して増加している、請求項1に記載のコリネバクテリウム属微生物。
- アスパラギン酸アミノトランスフェラーゼ、アスパラギン酸キナーゼ、アスパラギン酸セミアルデヒドデヒドロゲナーゼ、ジヒドロジピコリン酸シンターゼ、ジヒドロピコリン酸リダクターゼ、およびジアミノピメリン酸デカルボキシラーゼの酵素活性の増加は、コリネ型細菌群のaspB遺伝子、lysC遺伝子、asd遺伝子、dapA遺伝子、dapB遺伝子およびlysA遺伝子の発現の増加によるものである、請求項1に記載のコリネバクテリウム属微生物。
- 前記ピルビン酸カルボキシラーゼの酵素活性の増加は、コリネ型細菌群のpyc遺伝子の発現の増加によるものである、請求項2に記載のコリネバクテリウム属微生物。
- 前記発現の増加は、前記微生物の内在性遺伝子に対応する外来対立遺伝子の1つ以上のコピーを導入されることによるものである、請求項3または4に記載のコリネバクテリウム属微生物。
- 前記微生物は、受託番号KFCC10881のコリネ型細菌群である、請求項5に記載のコリネバクテリウム属微生物。
- 前記aspB遺伝子、lysC遺伝子、asd遺伝子、dapA遺伝子、dapB遺伝子、lysA遺伝子およびpyc遺伝子は、それぞれ配列番号25、26、27、28、29、30および37のヌクレオチド配列を有する、請求項5に記載のコリネバクテリウム属微生物。
- 前記導入は、それぞれ図2〜図6の切断地図を有するベクターをコリネ型細菌群に形質転換することにより行われる、請求項5に記載のコリネバクテリウム属微生物。
- 前記外来の対立遺伝子は、前記微生物の核DNAに挿入される、請求項5に記載のコリネバクテリウム属微生物。
- 前記微生物は、受託番号KCCM10770Pのコリネバクテリウムグルタミカム KFCC10881−CJ4である、請求項5に記載のコリネバクテリウム属微生物。
- 前記発現の増加は、各遺伝子に対する外来プロモーターの導入によってなされる、請求項3〜10のいずれか1項に記載のコリネバクテリウム属微生物。
- 前記外来プロモーターは、配列番号44〜50のいずれかに示されるヌクレオチド配列を有する、請求項11に記載のコリネバクテリウム属微生物。
- 前記外来プロモーターは、配列番号44に示されるヌクレオチド配列である、請求項12に記載のコリネバクテリウム属微生物。
- 前記外来プロモーターの導入は、図8〜図13に示されるベクターの少なくとも一つをコリネ型細菌群に導入することにより行われる、請求項11に記載のコリネバクテリウム属微生物。
- 請求項1〜14のいずれか1項に記載の微生物を培養する工程と、
前記微生物の細胞または細胞培養物からリジンを回収する工程段階とを含む、L−リジンの生産方法。
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- 2007-09-17 CN CN2007800341803A patent/CN101573438B/zh active Active
- 2007-09-17 JP JP2009528183A patent/JP5756259B2/ja active Active
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2011182779A (ja) * | 2010-03-05 | 2011-09-22 | Cj Cheiljedang Corp | 改良されたプローモーターおよびそれを用いたl−リシンの生産方法 |
JP2013544532A (ja) * | 2010-12-08 | 2013-12-19 | シージェイ チェイルジェダン コーポレーション | 向上したオルニチン生産能を有する微生物、及びそれを用いてオルニチンを生産する方法 |
KR101485222B1 (ko) | 2012-10-05 | 2015-01-22 | 상지대학교산학협력단 | dapA 활성 조절을 통해 L-쓰레오닌 생산능이 향상된 코리네박테리움 속 미생물 및 이를 이용한 L-쓰레오닌 생산방법 |
JP2022543128A (ja) * | 2019-12-23 | 2022-10-07 | シージェイ チェルジェダン コーポレイション | シトクロムcの活性が強化されたl-アミノ酸生産微生物およびこれを用いたl-アミノ酸の生産方法 |
JP7362895B2 (ja) | 2019-12-23 | 2023-10-17 | シージェイ チェルジェダン コーポレイション | シトクロムcの活性が強化されたl-アミノ酸生産微生物およびこれを用いたl-アミノ酸の生産方法 |
WO2021241218A1 (ja) * | 2020-05-29 | 2021-12-02 | 花王株式会社 | 新規プロモーター |
CN115044521A (zh) * | 2021-03-09 | 2022-09-13 | 大象株式会社 | L-赖氨酸生产能力得到提高的谷氨酸棒状杆菌突变株及利用其的l-赖氨酸的生产方法 |
CN115044521B (zh) * | 2021-03-09 | 2023-11-03 | 大象株式会社 | L-赖氨酸生产能力得到提高的谷氨酸棒状杆菌突变株及利用其的l-赖氨酸的生产方法 |
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Publication number | Publication date |
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WO2008033001A1 (en) | 2008-03-20 |
US20100143984A1 (en) | 2010-06-10 |
JP5756259B2 (ja) | 2015-07-29 |
JP6695308B2 (ja) | 2020-05-20 |
JP2017221202A (ja) | 2017-12-21 |
KR20080025355A (ko) | 2008-03-20 |
CN101573438B (zh) | 2013-01-02 |
BRPI0716980A2 (pt) | 2013-10-22 |
AU2007295159A1 (en) | 2008-03-20 |
AU2007295159B2 (en) | 2012-09-13 |
KR100924065B1 (ko) | 2009-10-27 |
CN101573438A (zh) | 2009-11-04 |
EP2066782A4 (en) | 2010-02-03 |
EP2066782A1 (en) | 2009-06-10 |
US9109242B2 (en) | 2015-08-18 |
EP3170889A1 (en) | 2017-05-24 |
JP2015171366A (ja) | 2015-10-01 |
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