JP6448682B2 - アルデヒドおよび対応するアルコールの微生物合成 - Google Patents
アルデヒドおよび対応するアルコールの微生物合成 Download PDFInfo
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- JP6448682B2 JP6448682B2 JP2017030900A JP2017030900A JP6448682B2 JP 6448682 B2 JP6448682 B2 JP 6448682B2 JP 2017030900 A JP2017030900 A JP 2017030900A JP 2017030900 A JP2017030900 A JP 2017030900A JP 6448682 B2 JP6448682 B2 JP 6448682B2
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- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 1
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- 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
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
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- KYMBYSLLVAOCFI-UHFFFAOYSA-N thiamine Chemical compound CC1=C(CCO)SCN1CC1=CN=C(C)N=C1N KYMBYSLLVAOCFI-UHFFFAOYSA-N 0.000 description 1
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Description
〔1〕代謝制御微生物細胞であって、 ピルビン酸デカルボキシラーゼ、又は、2−ケトイソ吉草酸デカルボキシラーゼをコードする組換え核酸、
前記ピルビン酸デカルボキシラーゼ、又は、2−ケトイソ吉草酸デカルボキシラーゼを、前記組換え核酸を有しない同じ細胞と比較して、ピルビン酸又は2−ケト酪酸のアルデヒドへの変換が増加するために有効な量で発現するために前記組換え核酸に操作可能に結合されたプロモータエレメント、
少なくとも1つのピルビン酸を酢酸に変換させる経路におけるノックアウト改変、及び、adhE又はyqhDの改変又は欠損、を有し、
ここで、前記改変又は欠損は、前記代謝制御微生物細胞においてアルコールデヒドロゲナーゼ活性を、前記改変又は欠損を有しない同じ細胞と比較して少なくとも70%減少させるように減少する、微生物細胞。
〔2〕非特異的アルコールデヒドロゲナーゼの更なる改変又は更なる欠損を有する上記微生物細胞。
〔3〕前記非特異的アルコールデヒドロゲナーゼは、yjgBによってコードされる上記微生物細胞。
〔4〕前記微生物細胞における減少した前記アルコールデヒドロゲナーゼ活性は、前記改変又は欠損を有しない同じ細胞と比較して少なくとも90%減少させる上記微生物細胞。
〔5〕前記組換え核酸は、プラスミドとして提供、又は、宿主細胞ゲノム内に統合される上記微生物細胞。
〔6〕前記組換え核酸は、ピルビン酸デカルボキシラーゼをコードする上記微生物細胞。
〔7〕前記組換え核酸は、2−ケトイソ吉草酸デカルボキシラーゼをコードする上記微生物細胞。
〔8〕1以上のleuA、leuB、leuC、及び、leuD遺伝子の発現に対する組換え核酸を更に有する上記微生物細胞。
〔9〕1以上のilvG、ilvM、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸、又は、1以上のilvB、ilvN、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸を更に有する上記微生物細胞。
〔10〕1以上のalsS、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸、又は、1以上のilvI、ilvH、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸を更に有する上記微生物細胞。
〔11〕エシェリキア(Escherichia)、バシラス(Bacillus)、コリネバクテリウム(Corynebacterium)、ラルストニア(Ralstonia)、ザイモモナス(Zymomonas)、クロストリジウム(Clostridium)、ラクトバシラス(Lactobacillus)、シネココッカス(Synechococcus)、シネコシスティス(Synechocystis)、サッカロミセス(Saccharomyces)、ピチア(Pichia)、カンジダ(Candida)、ハンセヌラ(Hansenula)、およびアスペルギルス(Aspergillus)から成る群から選択される属に属する請求項1に記載の微生物細胞。
〔12〕大腸菌(Escherichia coli)、枯草菌(Bacillus subtilis)、シネココッカス・エロンガタス(Synechococcus elongatus)、ラルストニア・ユートロファ(Ralstonia eutropha)、およびサッカロミセス・セレビジエ(Saccharomyces cerevisiae)から成る群から選択される種に属する上記微生物細胞。
〔13〕グルコース、フルクトース、スクロース、デンプン、セルロース、ヘミセルロース、グリセロール、二酸化炭素、タンパク質、およびアミノ酸から成る群から選択される炭素源を有する培地に置かれる上記微生物細胞。
〔15〕イソブチルアルデヒドを、0.5g/L〜4.0g/Lの濃度で含む上記発酵培地。
〔16〕グルコース、フルクトース、スクロース、デンプン、セルロース、ヘミセルロース、グリセロール、二酸化炭素、タンパク質、およびアミノ酸から成る群から選択される炭素源を有する上記発酵培地。
〔17〕前記発酵培地上の気相にイソブチルアルデヒドを置き換えるのに有効な量で未溶解性ガスを有する上記発酵培地。
発酵培地中で複数の微生物細胞を増殖する工程であって、前記細胞は改変を有しない同じ細胞と比較して増加した代謝活性を有するように遺伝子改変され、
前記代謝活性の増加は、組換えピルビン酸デカルボキシラーゼ又は2−ケトイソ吉草酸デカルボキシラーゼそれぞれの導入又は発現を介した、及び、ピルビン酸の酢酸へ変換する経路におけるノックアウト改変を介したピルビン酸又は2−ケト酪酸のアルデヒドへの変換の増加を特徴とし、
前記複数の微生物細胞が減少したアルコールデヒドロゲナーゼ活性を有するように更に遺伝子改変される工程であって、前記アルコールデヒドロゲナーゼ活性は更なる改変を有しない同じ細胞と比較して少なくとも70%減少され、そして、前記減少したアルコールデヒドロゲナーゼ活性は、adhE又はyqhDの欠損、及び、任意に非特異的アルコールデヒドロゲナーゼ活性の欠損によるものであり、
前記アルデヒドを前記発酵培地から気相内へ連続的もしくは半連続的に移動させる工程、
前記アルデヒドを前記気相から凝縮させる工程、および
前記凝縮させたアルデヒドを対応するアルコールに還元させる工程、を含む方法。
〔19〕前記微生物細胞は、
(i)組み換え2−ケトイソ吉草酸デカルボキシラーゼの発現を介した2−ケト吉草酸、2−ケトカプロン酸、2−ケトヘプタン酸、2−ケトオクタノン酸、2−ケト−3−メチル吉草酸、2−ケト−4−メチルカプロン酸、2−ケト−5−メチルヘプタン酸、2−ケト−6−メチルオクタノン酸、2−ケト−イソ吉草酸、2−ケトイソカプロン酸、及び、2−ケト−5−メチルヘキサン酸の内の1つ以上の脱カルボキシル化
(ii)1以上のilvG、ilvM、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介した、又は、1以上のilvB、ilvN、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介した2−ケト酪酸から2−ケト−3−メチル吉草酸への分岐炭素鎖延長、
(iii)1以上のalsS、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介した、又は、1以上のilvI、ilvH、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介したピルビン酸から2−ケト−イソ吉草酸への分岐炭素鎖延長、又は、
(iv)1以上のleuA、leuB、leuC、及びleuD遺伝子をコードする組換え核酸の発現を介した直鎖炭素鎖延長、におけて増加した代謝活性を有する上記方法。
〔20〕前記微生物細胞が、エシェリキア(Escherichia)、バシラス(Bacillus)、コリネバクテリウム(Corynebacterium)、ラルストニア(Ralstonia)、ザイモモナス(Zymomonas)、クロストリジウム(Clostridium)、ラクトバシラス(Lactobacillus)、シネココッカス(Synechococcus)、シネコシスティス(Synechocystis)、サッカロミセス(Saccharomyces)、ピチア(Pichia)、カンジダ(Candida)、ハンセヌラ(Hansenula)、およびアスペルギルス(Aspergillus)から成る群から選択される属に属する上記方法。
Claims (19)
- 代謝制御微生物細胞であって、
ピルビン酸デカルボキシラーゼ、又は、2−ケトイソ吉草酸デカルボキシラーゼをコードする組換え核酸、
前記ピルビン酸デカルボキシラーゼ、又は、2−ケトイソ吉草酸デカルボキシラーゼを、前記組換え核酸を有しない同じ細胞と比較して、ピルビン酸又は2−ケト酪酸のアルデヒドへの変換が増加するために有効な量で発現するために前記組換え核酸に操作可能に結合されたプロモータエレメント、
poxBのノックアウトを含むピルビン酸を酢酸に変換する経路でのノックアウト突然変異、ilvEのノックアウトを含む2−ケトイソ吉草酸をL−バリンに変換する経路でのノックアウト突然変異、及び、adhE又はyqhDの改変又は欠損、を有し、
ここで、前記改変又は欠損は、前記代謝制御微生物細胞においてアルコールデヒドロゲナーゼ活性を、前記改変又は欠損を有しない同じ細胞と比較して少なくとも70%減少させるように減少するものであり、
大腸菌(Escherichia coli)、枯草菌(Bacillus subtilis)、シネココッカス・エロンガタス(Synechococcus elongatus)、ラルストニア・ユートロファ(Ralstonia eutropha)、及び、サッカロミセス・セレビジエ(Saccharomyces cerevisiae)からなる群から選択される種に属する、微生物細胞。 - 非特異的アルコールデヒドロゲナーゼの更なる改変又は更なる欠損を有する請求項1に記載の微生物細胞。
- 前記非特異的アルコールデヒドロゲナーゼは、yjgBによってコードされる請求項2に記載の微生物細胞。
- 前記微生物細胞における減少した前記アルコールデヒドロゲナーゼ活性は、前記改変又は欠損を有しない同じ細胞と比較して少なくとも90%減少させる請求項1に記載の微生物細胞。
- 前記組換え核酸は、プラスミドとして提供、又は、宿主細胞ゲノム内に統合される請求項1に記載の微生物細胞。
- 前記組換え核酸は、前記ピルビン酸デカルボキシラーゼをコードする請求項1に記載の微生物細胞。
- 前記組換え核酸は、前記2−ケトイソ吉草酸デカルボキシラーゼをコードする請求項1に記載の微生物細胞。
- 1以上のleuA、leuB、leuC、及び、leuD遺伝子の発現に対する組換え核酸を更に有する請求項1に記載の微生物細胞。
- 1以上のilvG、ilvM、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸、又は、1以上のilvB、ilvN、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸を更に有する請求項1に記載の微生物細胞。
- 1以上のalsS、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸、又は、1以上のilvI、ilvH、ilvC、及び、ilvD遺伝子の発現に対する組換え核酸を更に有する請求項1に記載の微生物細胞。
- グルコース、フルクトース、スクロース、デンプン、セルロース、ヘミセルロース、グリセロール、二酸化炭素、タンパク質、及びアミノ酸から成る群から選択される炭素源を有する培地に置かれる請求項1に記載の微生物細胞。
- 請求項1に記載の微生物細胞を含む発酵培地であって、前記微生物細胞は、イソブタノール(g/L)よりもイソブチルアルデヒド(g/L)をより多く産生する、発酵培地。
- イソブチルアルデヒドを、0.5g/L〜4.0g/Lの濃度で含む請求項12に記載の発酵培地。
- グルコース、フルクトース、スクロース、デンプン、セルロース、ヘミセルロース、グリセロール、二酸化炭素、タンパク質、及びアミノ酸から成る群から選択される炭素源を有する請求項12に記載の発酵培地。
- 前記発酵培地上の気相にイソブチルアルデヒドを置き換えるのに有効な量で未溶解性ガスを有する、請求項12に記載の発酵培地。
- アルコールを製造する方法であって、
発酵培地中で複数の微生物細胞を増殖する工程であって、前記細胞は改変を有しない同じ細胞と比較して増加した代謝活性を有するように遺伝子改変され、
前記代謝活性の増加は、組換えピルビン酸デカルボキシラーゼ又は2−ケトイソ吉草酸デカルボキシラーゼそれぞれの導入又は発現を介した、及び、
poxBのノックアウトを含むピルビン酸を酢酸に変換する経路でのノックアウト突然変異、並びに、ilvEのノックアウトを含む2−ケトイソ吉草酸をL−バリンに変換する経路でのノックアウト突然変異を介したピルビン酸又は2−ケト酪酸のアルデヒドへの変換の増加を特徴とし、
前記複数の微生物細胞が減少したアルコールデヒドロゲナーゼ活性を有するように更に遺伝子改変される工程であって、前記アルコールデヒドロゲナーゼ活性は更なる改変を有しない同じ細胞と比較して少なくとも70%減少され、そして、前記減少したアルコールデヒドロゲナーゼ活性は、adhE及びyqhDの欠損によるものであり、
ここで、微生物細胞は、大腸菌(Escherichia coli)、枯草菌(Bacillus subtilis)、シネココッカス・エロンガタス(Synechococcus elongatus)、ラルストニア・ユートロファ(Ralstonia eutropha)、及びサッカロミセス・セレビジエ(Saccharomyces cerevisiae)からなる群から選択される種に属し、
前記アルデヒドを前記発酵培地から気相内へ連続的もしくは半連続的に移動させる工程、
前記アルデヒドを前記気相から凝縮させる工程、及び、
前記凝縮させたアルデヒドを対応するアルコールに還元させる工程、を含む方法。 - 前記微生物細胞は、非特異的アルコールデヒドロゲナーゼの更なる改変又は更なる欠損を有する請求項16に記載の方法。
- 前記非特異的アルコールデヒドロゲナーゼは、yjgBによってコードされる請求項17に記載の方法。
- 前記微生物細胞は、
(i)組み換え2−ケトイソ吉草酸デカルボキシラーゼの発現を介した2−ケト吉草酸、2−ケトカプロン酸、2−ケトヘプタン酸、2−ケトオクタノン酸、2−ケト−3−メチル吉草酸、2−ケト−4−メチルカプロン酸、2−ケト−5−メチルヘプタン酸、2−ケト−6−メチルオクタノン酸、2−ケト−イソ吉草酸、2−ケトイソカプロン酸、及び、2−ケト−5−メチルヘキサン酸の内の1つ以上の脱カルボキシル化
(ii)1以上のilvG、ilvM、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介した、又は、1以上のilvB、ilvN、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介した2−ケト酪酸から2−ケト−3−メチル吉草酸への分岐炭素鎖延長、
(iii)1以上のalsS、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介した、又は、1以上のilvI、ilvH、ilvC、及び、ilvD遺伝子をコードする組換え核酸の発現を介したピルビン酸から2−ケト−イソ吉草酸への分岐炭素鎖延長、又は、
(iv)1以上のleuA、leuB、leuC、及びleuD遺伝子をコードする組換え核酸の発現を介した直鎖炭素鎖延長、において増加した代謝活性を有する請求項16に記載の方法。
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