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Enhanced Genome Editing with Cas9 Ribonucleoprotein in Diverse Cells and Organisms
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ゲノムで再コードされた生物は,生物学的機能を拡張します.

Marc J Lajoie1, Alexis J Rovner, Daniel B Goodman

  • 1Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.

Science (New York, N.Y.)
|October 19, 2013
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まとめ
この要約は機械生成です。

科学者たちは,Escherichia coli.のUAGストップコドンを置換することで,ゲノムで再コードされた生物 (GRO) を設計した. この遺伝子組み換えバクテリアは,非標準のアミノ酸を組み込むための強化された能力を示し,T7細菌に対する耐性を高めています.

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科学分野:

  • 合成生物学 合成生物学とは
  • 微生物遺伝学 微生物遺伝学
  • 分子生物学は分子生物学である.

背景:

  • 遺伝コードはほぼ普遍的ですが,ストップコードンは再割り当てできます.
  • Escherichia coliは,UAGのストップコドンを認識するためにリリース因子1 (RF1) に依存しています.
  • タンパク質の多様性を拡大するには,非標準のアミノ酸を組み込む方法が必要です.

研究 の 目的:

  • Escherichia coli.でゲノムで再コードされた生物 (GRO) を構築し,特徴づけること.
  • 新しい生物学的機能のためにUAGのストップコドンの再割り当てを可能にします.
  • 遺伝子コードの拡張がタンパク質の特性やウイルス耐性に与える影響を調査する.

主な方法:

  • Escherichia coli MG1655のゲノム内のすべてのUAGストップコドンを同義的なUAAコドンで体系的に置き換える.
  • UAGの認識を排除するために,解放因子1 (RF1) 遺伝子を削除します.
  • 結果となるGROの特徴は,非標準のアミノ酸を組み込む能力とT7細菌菌に対する耐性である.

主要な成果:

  • UAGコードンが再割り当てされた,ゲノムで再コードされたEscherichia coli菌株の建設に成功しました.
  • 非標準のアミノ酸のインビヴォ組み込み能力が向上し,タンパク質の化学的多様性を拡大しています.
  • エンジニアリングされたGROでは,T7細菌の感染に対する抵抗性の増加が観察されました.

結論:

  • UAGの再割り当てによるゲノム再コーディングは,Escherichia coli.で実現可能である.
  • このアプローチは,タンパク質工学を含む合成生物学アプリケーションにおけるEscherichia coliの有用性を高めています.
  • 遺伝子コードの拡張は,エンジニアリングされた生物において,ウイルス抵抗性の向上などの有利な特性を授与することができます.