JP2021500914A - L−リジンを生産する組換え菌、その構築方法およびl−リジンの生産方法 - Google Patents
L−リジンを生産する組換え菌、その構築方法およびl−リジンの生産方法 Download PDFInfo
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- JP2021500914A JP2021500914A JP2020524437A JP2020524437A JP2021500914A JP 2021500914 A JP2021500914 A JP 2021500914A JP 2020524437 A JP2020524437 A JP 2020524437A JP 2020524437 A JP2020524437 A JP 2020524437A JP 2021500914 A JP2021500914 A JP 2021500914A
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Classifications
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- C—CHEMISTRY; METALLURGY
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- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/04—Alpha- or beta- amino acids
- C12P13/08—Lysine; Diaminopimelic acid; Threonine; Valine
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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
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Abstract
Description
Claims (10)
- L−リジンを生産する組換え菌であって、前記組換え菌は、出発菌に比べて、向上されたアスパラギナーゼの発現および/または活性を有し、前記出発菌はリジンを蓄積できる菌株であることを特徴とする組換え菌。
- 前記組換え菌は、少なくとも2つのコピーされたアスパラギナーゼ符号化遺伝子を有し、および/または前記組換え菌のアスパラギナーゼ符号化遺伝子の発現が高転写または高発現活性の調節因子によって媒介され、好ましくは、前記調節因子は、強力プロモーターであり、より好ましくは、前記強力プロモーターは、Ptufプロモーターであることを特徴とする請求項1に記載の組換え菌。
- 前記組換え菌は、出発菌に比べて、低下されたホモセリンデヒドロゲナーゼの発現および/または活性を有し、好ましくは、前記低下されたホモセリンデヒドロゲナーゼの発現は下記方法の少なくとも一つによって実現される:(A)前記組換え菌のホモセリンデヒドロゲナーゼ符号化遺伝子を失活させる、(B)前記組換え菌のホモセリンデヒドロゲナーゼ符号化遺伝子の発現が低転写または低発現活性の調節因子によって媒介される、前記低下されたホモセリンデヒドロゲナーゼの活性は、前記組換え菌のホモセリンデヒドロゲナーゼの59番目のバリンがアラニンに突然変異する方法によって実現され、前記組換え菌のホモセリンデヒドロゲナーゼ符号化遺伝子は、好ましくはSEQ ID NO.1に示されるようであることを特徴とする請求項1に記載の組換え菌。
- 前記組換え菌は、出発菌に比べて、向上されたピルビン酸カルボキシラーゼの発現および/または活性を有し、好ましくは、前記向上されたピルビン酸カルボキシラーゼの発現は下記方法の少なくともひとつによって実現される:(C)前記組換え菌は、少なくとも2つのコピーされたピルビン酸カルボキシラーゼ符号化遺伝子を有する、(D)前記組換え菌のピルビン酸カルボキシラーゼ符号化遺伝子の発現が高転写または高発現活性の調節因子によって媒介され、前記向上されたピルビン酸カルボキシラーゼの活性は、前記ピルビン酸カルボキシラーゼの458番目のプロリンがセリンに突然変異する方法で実現され、前記組換え菌のピルビン酸カルボキシラーゼ符号化遺伝子は、好ましくはSEQ ID NO.8に示されるようであることを特徴とする請求項1に記載の組換え菌。
- 前記組換え菌は、出発菌に比べて、低下したホスホエノールピルビン酸カルボキシキナーゼの発現および/または活性を有し、好ましくは、前記組換え菌のホスホエノールピルビン酸カルボキシキナーゼ符号化遺伝子を失活させ、および/またはホスホエノールピルビン酸カルボキシキナーゼ符号化遺伝子の発現が低転写または低発現活性の調節因子によって媒介され、より好ましくは、前記失活は、前記組換え菌のホスホエノールピルビン酸カルボキシキナーゼ符号化遺伝子をノックアウトすることであることを特徴とする請求項1に記載の組換え菌。
- 前記組換え菌は、出発菌に比べて、向上されたジヒドロジピコリン酸レダクターゼの発現および/または活性を有し、好ましくは、前記組換え菌は、少なくとも2つのコピーされたジヒドロジピコリン酸レダクターゼ符号化遺伝子を有し、および/またはジヒドロジピコリン酸レダクターゼ符号化遺伝子の発現が高転写または高発現活性の調節因子によって媒介され、より好ましくは、前記調節因子は、強力プロモーターであり、最も好ましくは、前記強力プロモーターは、前記出発菌のPtufプロモーターであることを特徴とする請求項1に記載の組換え菌。
- 前記組換え菌は、出発菌に比べて、向上されたアスパラギン酸キナーゼ、ジアミノピメリン酸デヒドロゲナーゼおよび/またはジアミノヘプタナートデカルボキシラーゼの発現および/または活性を有し、好ましくは、前記組換え菌は、少なくとも2つのコピーされたアスパラギン酸キナーゼ符号化遺伝子、ジアミノピメリン酸デヒドロゲナーゼ符号化遺伝子および/またはジアミノヘプタナートデカルボキシラーゼ符号化遺伝子を有し、および/またはアスパラギン酸キナーゼ符号化遺伝子、ジアミノピメリン酸デヒドロゲナーゼ符号化遺伝子、および/またはジアミノヘプタナートデカルボキシラーゼ符号化遺伝子の発現が高転写または高発現活性の調節因子によって媒介され、より好ましくは、前記調節因子は、強力プロモーターであり、最も好ましくは、前記強力プロモーターは、前記出発菌のPtufプロモーターであることを特徴とする請求項1に記載の組換え菌。
- 前記出発菌は、コリネバクテリウム属、ブレビバクテリウム属、バチルス属、ビフィズス菌属およびラクトバシラス属のうちから選ばれる1本の細菌または酵母から選ばれる1本の真菌であり、
前記コリネバクテリウム属の細菌はコリネバクテリウム・グルタミクムCorynebacterium glutamicum、コリネバクテリウム・北京Corynebacterium pekinense、コリネバクテリウム・エフィシエンスCorynebacterium efficiens、コリネバクテリウム・クレナツムCorynebacterium crenatum、コリネバクテリウム・サーモアミノゲネスCorynebacterium thermoaminogenes、コリネバクテリウム・アミノゼンCorynebacterium aminogenes、コリネバクテリウム・リリウムCorynebacterium lilium、コリネバクテリウム・カルーナCorynebacterium callunaeおよびコリネバクテリウム・ハーキュリスCorynebacterium herculisのうちから選ばれる1本の細菌であり、
前記ブレビバクテリウム属の細菌はブレビバクテリウム・フラバムBrevibacteriaceae flvum、ブレビバクテリウム・ラクトファーメンタムBrevibacteriaceae lactofermentumおよびブレビバクテリウム・アンモニアゲネスBrevibacteriaceae ammoniagenesのうちから選ばれる1本の細菌であり、
前記バチルス属の細菌はバシラス・リケニフォルミスBacillus licheniformis、バチルス・サブティリスBacillus subtilisおよびバチルス・プミルスBacillus pumilusのうちから選ばれる1本の細菌であり、
前記ビフィズス菌属の細菌はビフィドバクテリウム・ビフィドゥムBifidobacterium bifidum、ビフィドバクテリウム・ロングムBifidobacterium longum、ビフィドバクテリウム・ブレーベBifidobacterium breveおよびビフィドバクテリウム・アドレッセンティスBifidobacterium adolescentisのうちから選ばれる1本の細菌であり、
前記ラクトバシラス属の細菌は好酸性乳酸桿菌Lactobacillus acidophilus、ラクトバチルス・カゼイLactobacillus casei、ラクトバチラス・デルブルッキー・サブスピーシスLactobacillus delbrueckii subspおよびラクトバチルス・ファーメンタムLactobacillus fermentumのうちから選ばれる1本の細菌であり、
前記酵母の真菌は、カンジダ・ユチリスCadida utilis、サッカロマイセス・セレビシエSacharmycess cerevisia、ピキア酵母Pichia pastoresおよびハンセニューラ・ポリモルファHansenula polymorphaのうちから選ばれる1本の真菌であることを特徴とする請求項1〜7のいずれか1項に記載の組換え菌。 - 前記出発菌におけるアスパラギナーゼの発現および/または活性を向上させるステップを含み、好ましくは、前記出発菌におけるアスパラギナーゼの発現および/または活性を向上させることは、下記方法の少なくとも一つによって実現される:(E)前記出発菌におけるアスパラギナーゼ符号化遺伝子のコピー数を増やす、(F)前記出発菌におけるアスパラギナーゼ符号化遺伝子の調節因子を高転写または高発現活性の調節因子に置き換える、ことを特徴とする請求項1〜8のいずれか1項に記載の組換え菌の構築方法。
- 請求項1〜8のいずれか1項に記載の組換え菌を発酵培養するステップを含むことを特徴とするL−リジンの生産方法。
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CA3081113A1 (en) | 2019-05-09 |
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PH12020550529A1 (en) | 2021-04-26 |
WO2019085445A1 (zh) | 2019-05-09 |
CN109750069A (zh) | 2019-05-14 |
US20200347419A1 (en) | 2020-11-05 |
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