JP2022501028A - プロモータ工学によるアルコールデヒドロゲナーゼ2(adh2)プロモータ変異体の設計 - Google Patents
プロモータ工学によるアルコールデヒドロゲナーゼ2(adh2)プロモータ変異体の設計 Download PDFInfo
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Abstract
Description
a)配列の設計、および
b)設計されたモジュールの組込みのためのP.pastorisゲノムの標的部位の選択。
o開発されたADH2プロモータ変異体は、野生型ADH2プロモータと比較して、エタノール誘導下で有意に高い産生収量を行うことができる。
o開発されたADH2プロモータ変異体は、メタノールで中強度に誘導することができる。
材料および方法
PADH2−Cat1(PADH2−Cat8−L1)およびPADH2−Cat2(PADH2−Cat8−L2)プロモータ変異体の設計とレポータータンパク質を用いたクローニング
プロモータ変異体を有する組換えベクターを用いた酵母ピキア・パストリスの形質転換およびプロモータ変異体の発現能力の評価
・ADH2プロモータ変異体を作成すること、
・eGFPレポーター遺伝子を付加した発現カセットを作成すること、
・組換えベクタープロモータ変異体を作成すること、
・真核細胞、特に酵母細胞、好ましくはメチロトローフ酵母細胞、好ましくはピキア、カンジダ、ハンセヌラおよびトルプロシスからなる群から選択される酵母細胞、特にピキア・パストリスを組換えベクターで形質転換し、当該形質転換された細胞を適当な培地中で培養すること、
・好ましくは、当該タンパク質、ペプチドまたは機能的核酸分子を誘導性発現すること、
・生成されたタンパク質、ペプチド、機能性核酸分子を単離することにより発現される。
結果
Ahmad, M.,Hirz, M., Pichler, H., &Schwab, H. (2014). Protein expression in Pichiapastoris: recent achievements and perspectives for heterologous protein production. Applied microbiology and biotechnology, 98(12), 5301-5317.
Curran, K. A.,Crook, N. C., Karim, A. S., Gupta, A., Wagman, A. M., & Alper, H. S. (2014). Design of synthetic yeast promoters via tuning of nucleosome architecture. Nature communications, 5.
Hartner, F.S.,Ruth, C., Langenegger, D., Johnson, S.N., Hyka, P., vd. (2008). Promoter library designed for fine-tuned gene expression in Pichiapastoris. Nucleic acids research, 36(12), e76-e76.
Invitrogen (2010), EasySelectTM Pichia Expression Kit For Expression of Recombinant Proteins Using pPICZ and PPICZα in Pichiapastoris
Li, B.,Carey, M. and Workman, J.L. (2007). The role of chromatin during transcription. Cell 128: 707-719.
Roth, S.,Kumme, J., and Schuller, H. J. (2004). Transcriptional activators Cat8 and Sip4 discriminate between sequence variants of the carbon source-responsive promoter element in the yeast Saccharomyces cerevisiae. Current genetics, 45(3), 121-128.
Sambrook, J.,Russell, D.W. (2001) “Molecular cloning: a library manual”, 3rdedn., Cold Spring Harbor Library Press, Cold Spring Harbor, New York
Struhl, K., and Segal, E. (2013). Determinants of nucleosome positioning. Nature structural and molecular biology, 20(3), 267-273.
Xi, L.,Fondufe-Mittendorf, Y., Xia, L., Flatow, J., Widom, J., & Wang, J. P. (2010). Predicting nucleosome positioning using a duration Hidden Markov Model. BMC bioinformatics, 11(1), 1.
Claims (11)
- エタノールおよびメタノール誘導条件下で、野生型P.pastoris ADH2プロモータ(配列番号1)のヌクレオチド1〜948(−1047〜−100)内の少なくとも1つの変異を含む、ピキア・パストリスアルコールデヒドロゲナーゼ2(ADH2)プロモータ変異体
- プロモータ変異体を設計する方法であって、ピキア・パストリスADH2プロモータが、ヌクレオチド647〜660(−401〜−388)、739〜752(−309〜−296)、100〜1000(−948〜−48)内の任意の位置におけるCat8転写因子結合部位(TFBS)の組込み、特に「TTCCGTTCGTCCGA」遺伝子配列またはこの配列と少なくとも80%の類似性を示す他の遺伝子配列の組込みからなる変異と、ヌクレオチド15〜848(−1033〜−200)内の配列番号2で指定される変異と、それらの組み合わせと、を含む、方法。
- ヌクレオチドが、欠失、置換、挿入、および/または反転によって変異される、請求項2のいずれかに記載のプロモータ変異体構築方法。
- 請求項1、2または3のいずれか一項に記載の少なくとも1つのADH2プロモータ変異体、タンパク質(ペプチド)または機能的ヌクレオチドをコードする少なくとも1つの核酸分子を含む発現カセットであって、前記プロモータ変異体および核酸分子が、シングルコピーまたはマルチコピーの発現カセットを形成する、発現カセット。
- 前記プロモータおよび前記核酸が互いに作動可能に連結されていることを特徴とする、請求項4に記載の発現カセット。
- 請求項1、2または3のいずれかに記載のピキア・パストリスアルコールデヒドロゲナーゼ2(ADH2)プロモータ変異体と、請求項4に記載の少なくとも1つの核酸分子とを含む、ベクター。
- 請求項1、2または3のいずれかに記載の少なくとも1つのピキア・パストリスアルコールデヒドロゲナーゼ2(ADH2)プロモータ変異体と、請求項4に記載の少なくとも1つの発現カセット、または請求項6に記載の少なくとも1つのベクターとを含む、細胞。
- 前記細胞が真核細胞、特に酵母細胞、好ましくはメチロトローフ酵母細胞、好ましくはピキア、カンジダ、ハンセヌラおよびトルプロシスからなる群から選択される酵母細胞、特にピキア・パストリス細胞である、請求項7に記載の細胞。
- 以下のステップを含む組換えタンパク質、ペプチドまたは機能的核酸の発現方法であって、
−請求項4に記載の発現カセット、あるいは請求項1、2または3のいずれかに記載のADH2プロモータ変異体を含む請求項6に記載のベクター、および請求項4または5のいずれかに記載のタンパク質、ペプチドまたは機能的核酸分子をコードする核酸分子を提供することと、
−前記ベクターまたは核酸分子を用いて、請求項7または8のいずれかに記載の前記細胞を形質転換することと、
−形質転換した細胞を適切な培地で培養することと、
−好ましくは、前記タンパク質、ペプチドまたは機能的核酸分子を誘導性発現することと、
−産生されたタンパク質、ペプチドまたは機能的核酸分子を単離することと、を含む、方法。 - 前記細胞が、請求項7または8のいずれかに記載の酵母細胞、好ましくはメチロトローフ酵母細胞、好ましくはピキア、カンジダ、ハンセヌラおよびトルプロシスからなる群から選択される酵母細胞、特にピキア・パストリス細胞である、請求項9に記載の方法。
- 請求項4に記載の発現カセット、請求項6に記載のベクター、あるいは請求項7または8のいずれかに記載の細胞を使用することを特徴とする、組換えタンパク質、ペプチドまたは機能的核酸分子の産生方法。
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