JP2015518736A - 組換え微生物およびその使用 - Google Patents
組換え微生物およびその使用 Download PDFInfo
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- JP2015518736A JP2015518736A JP2015516270A JP2015516270A JP2015518736A JP 2015518736 A JP2015518736 A JP 2015518736A JP 2015516270 A JP2015516270 A JP 2015516270A JP 2015516270 A JP2015516270 A JP 2015516270A JP 2015518736 A JP2015518736 A JP 2015518736A
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- Prior art keywords
- nucleic acid
- butanediol
- mek
- butanol
- bacterium
- 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.)
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Abstract
Description
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、
MEKの2−ブタノールへの変換を触媒する酵素、のうちの1つ以上を発現するように適合される。
(S)−2,3−ブタンジオールデヒドロゲナーゼ、
ジオール/グリセロールデヒドラターゼ、
アルコールデヒドロゲナーゼ、および
それらの任意の1つ以上の機能的に等価な変異体から選択される1つ以上の酵素を発現または過剰発現することができるように適合される。
(S)−2,3−ブタンジオールデヒドロゲナーゼ、
ジオール/グリセロールデヒドラターゼ、および
それらの任意の1つ以上の機能的に等価な変異体から選択される1つ以上の酵素を発現または過剰発現するように適合される。
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、および
MEKの2−ブタノールへの変換を触媒する酵素のうちの1つ以上の活性を欠く。
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、
MEKの2−ブタノールへの変換を触媒する酵素のうちの1つ以上をコードする1つ以上の遺伝子を欠く。
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、および
MEKの2−ブタノールへの変換を触媒する酵素からなる群から選択される1つ以上の酵素をコードする。
(a)本発明の第1の態様の1つ以上の微生物の培養物を収容するバイオリアクターに、COを含む基質を提供するステップと、
(b)バイオリアクター内の培養物を嫌気的に発酵させて、少なくともMEKおよび/または2−ブタノールを産生するステップと、を含む。
a.ガスが大気中に放出される前に、産業プロセスの結果として産生されたCO含有ガスを捕捉するステップと、
b.本発明の第1の態様の1つ以上の微生物を含有する培養物によって、CO含有ガスを嫌気的に発酵させて、少なくともMEKおよび/または2−ブタノールを産生するステップと、を含む。
微生物
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、および
MEKの2−ブタノールへの変換を触媒する酵素、のうちの1つ以上を発現または過剰発現するように適合される。
(S)−2,3−ブタンジオールデヒドロゲナーゼ(EC1.1.1.B20またはEC1.1.1.76)、
ジオール/グリセロールデヒドラターゼ(EC4.2.1.28/4.2.1.30)、
アルコールデヒドロゲナーゼ(EC1.1.1.2)、および
それらの任意の1つ以上の機能的に等価な変異体から選択される1つ以上の酵素を発現または過剰発現するように適合される。
(S)−2,3−ブタンジオールデヒドロゲナーゼ(EC1.1.1.B20またはEC1.1.1.76)、
ジオール/グリセロールデヒドラターゼ(EC4.2.1.28/4.2.1.30)、および
それらの任意の1つ以上の機能的に等価な変異体から選択される1つ以上の酵素を発現または過剰発現するように適合される。
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、および
MEKの2−ブタノールへの変換を触媒する酵素のうちの1つ以上の活性を欠く。
(R)−アセトインの(R,S)−2,3−ブタンジオールへの変換を触媒する酵素、
(R,S)−2,3−ブタンジオールのMEKへの変換を触媒する酵素、および
MEKの2−ブタノールへの変換を触媒する酵素のうちの1つ以上をコードする1つ以上の遺伝子を欠く。
核酸
(i)本明細書に記載される発現構築物/ベクターを、および(ii)メチルトランスフェラーゼ遺伝子を含むメチル化構築物/ベクターをシャトル微生物に導入するステップと、
メチルトランスフェラーゼ遺伝子を発現するステップと、
シャトル微生物から1つ以上の構築物/ベクターを単離するステップと、
1つ以上の構築物/ベクターを目的の微生物に導入するステップと、を含む方法により産生される。
産生方法
(a)本発明の1つ以上の微生物の培養物を収容するバイオリアクターに、COを含む基質を提供するステップと、
(b)バイオリアクター内の培養物を嫌気的に発酵させて、少なくともMEKおよび/または2−ブタノールを産生するステップと、を含む。
(a)ガスが大気中に放出される前に、産業プロセスの結果として産生されたCO含有ガスを捕捉するステップと、
(b)本発明の1つ以上の微生物を含有する培養物によって、CO含有ガスを嫌気的に発酵させて、少なくともMEKおよび/または2−ブタノールを産生するステップと、を含む。
実施例
微生物
アルコールデヒドロゲナーゼによるC.オートエタノゲナムにおけるMEKの2−ブタノールへの変換
クレブシエラ・オキシトカからのジオールデヒドラターゼ遺伝子(pddABC)を有するクロストリジウムの発現プラスミドの構築
pddABC発現プラスミドのC.オートエタノゲナムへの導入
C.オートエタノゲナムにおけるジオールデヒドラターゼのインビボ活性試験
再活性化因子タンパク質ddrABの同時発現によるメソ−BDOのMEKへの変換の改善
メソ−2,3−ブタンジオールを産生するための遺伝子を伴う発現プラスミドの構築および大腸菌におけるインビボ試験
一酸化炭素からのメソ−BDOの産生
C.オートエタノゲナムDSM23693のD−(−)−2,3−ブタンジオールデヒドロゲナーゼの不活性化:
2,3bdh遺伝子破壊の確認
メソ−2,3−ブタンジオール産生デヒドロゲナーゼの発現
発現ベクターの構築:
C.オートエタノゲナムの転換
形質転換されたC.オートエタノゲナムにおけるメソ−2,3−ブタンジオール産生
持続攪拌槽型反応器(CSTR)中の形質転換されたC.オートエタノゲナムにおけるメソ−2,3−ブタンジオール産生
サンプリングおよび分析手順
HPLC:
サンプルの調製方法:
頭部空間の分析:
細胞密度:
メソ−2,3−ブタンジオールデヒドロゲナーゼbudC遺伝子発現の発現:
一酸化炭素からのMEKおよび2−ブタノールの産生
発現ベクターの構築
C.オートエタノゲナムおよび誘導(deviative)株の形質転換
D−(−)−2,3−ブタンジオールデヒドロゲナーゼおよびアルコールデヒドロゲナーゼ両方のノックアウト
(a)相同組換えによるΔ2,3bdh ΔSecAdh二重ノックアウトC.オートエタノゲナムDSM23693株:
(b)ClosTronを用いたΔ2,3bdh ΔSecAdh二重遺伝子破壊:
Claims (20)
- メソ−2,3−ブタンジオールデヒドロゲナーゼ酵素をコードする外因性核酸と、ジオール/グリセロールデヒドラターゼ酵素をコードする外因性核酸と、を含む、単離された遺伝子操作されたカルボキシド栄養性(carboxydotrophic)酢酸産生性細菌であって、前記酵素を発現する、細菌。
- 前記細菌が、D−(−)2,3−ブタンジオールデヒドロゲナーゼ遺伝子においてノックアウト変異を有する、請求項1に記載の単離された遺伝子操作されたカルボキシド栄養性酢酸産生性細菌。
- 前記ジオール/グリセロールデヒドラターゼの再活性化タンパク質をコードする外因性核酸をさらに含む、請求項1に記載の単離された遺伝子操作されたカルボキシド栄養性酢酸産生性細菌。
- 前記核酸の不在下で、前記細菌が前記酵素を発現しない、請求項1に記載の細菌。
- 嫌気性条件下で前記酵素を発現する、請求項1に記載の細菌。
- メソ−2,3−ブタンジオールデヒドロゲナーゼ酵素をコードする核酸と、ジオール/グリセロールデヒドラターゼ酵素をコードする核酸と、を含む、カルボキシド栄養性酢酸産生性細菌において複製することができるプラスミドであって、前記プラスミドが前記細菌に形質転換されると、前記細菌が前記酵素を発現する、プラスミド。
- COおよび/またはCO2を2−ブタノールに変換するためのプロセスであって、
請求項1に記載のカルボキシド栄養性酢酸産生性細菌が前記COおよび/またはCO2を2−ブタノールに変換するように、ガス状のCO含有および/またはCO2含有基質を、培養培地中の前記細菌の培養物を含有するバイオリアクターに通すことと、
前記バイオリアクターから前記ブタノールを回収することと、を含む、プロセス。 - 請求項1に記載の細菌のアルコールデヒドロゲナーゼ遺伝子においてノックアウト変異をさらに含む、請求項1に記載の細菌。
- 請求項8に記載の細菌のD−(−)2,3−ブタンジオールデヒドロゲナーゼにおいてノックアウト変異をさらに含む、請求項8に記載の細菌。
- ジオール/グリセロールデヒドラターゼの再活性化タンパク質をコードする外因性核酸をさらに含む、請求項8に記載の細菌。
- ジオール/グリセロールデヒドラターゼの再活性化タンパク質をコードする外因性核酸をさらに含む、請求項9に記載の細菌。
- COおよび/またはCO2をメチルエチルケトン(MEK)に変換するためのプロセスであって、
請求項8に記載のカルボキシド栄養性酢酸産生性細菌が前記COおよび/またはCO2をMEKに変換するように、ガス状のCO含有および/またはCO2含有基質を、培養培地中の前記細菌の培養物を含有するバイオリアクターに通すことと、
前記バイオリアクターから前記MEKを回収することと、を含む、プロセス。 - 前記細菌が、D−(−)−2,3−ブタンジオールデヒドロゲナーゼ遺伝子におけるノックアウト変異を有する、請求項7または12に記載のプロセス。
- 前記細菌が、前記ジオール/グリセロールデヒドラターゼの再活性化タンパク質をコードする外因性核酸をさらに含む、請求項7または12に記載のプロセス。
- 前記細菌が、D−(−)−2,3−ブタンジオールデヒドロゲナーゼ遺伝子におけるノックアウト変異と、前記ジオール/グリセロールデヒドラターゼの再活性化タンパク質をコードする外因性核酸と、を有する、請求項7または12に記載のプロセス。
- クロストリジウム・オートエタノゲナムのためにコドン最適化されたメソ−2,3−ブタンジオールデヒドロゲナーゼをコードする、核酸。
- クロストリジウム・オートエタノゲナムのためにコドン最適化されたジオール/グリセロールデヒドラターゼコドンをコードする、核酸。
- 前記メソ−2,3−ブタンジオールデヒドロゲナーゼが、クレブシエラ・ニューモニエメソ−2,3−ブタンジオールデヒドロゲナーゼである、請求項16に記載の核酸。
- 前記ジオール/グリセロールデヒドラターゼが、クレブシエラ・オキシトカジオール/グリセロールデヒドラターゼである、請求項17に記載の核酸。
- クレブシエラ・オキシトカジオール/グリセロールデヒドラターゼをさらにコードする、請求項16に記載の核酸。
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US9890384B2 (en) | 2018-02-13 |
CN113186144A (zh) | 2021-07-30 |
US20130330809A1 (en) | 2013-12-12 |
KR102079275B1 (ko) | 2020-02-19 |
KR20150020619A (ko) | 2015-02-26 |
WO2013185123A1 (en) | 2013-12-12 |
EP2859089B1 (en) | 2017-03-22 |
EP2859089A1 (en) | 2015-04-15 |
EP2859089A4 (en) | 2015-12-30 |
CN104919037A (zh) | 2015-09-16 |
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