DNA複製フォークで精密な編集により,ユカリオットの複合ゲノム工学が可能になる
Edward M Barbieri1, Paul Muir1, Benjamin O Akhuetie-Oni1
1Department of Molecular, Cellular, & Developmental Biology, Yale University, New Haven, CT 06520, USA; Systems Biology Institute, Yale University, West Haven, CT 06516, USA.
Cell
|November 21, 2017
まとめ
この研究は,酵母における新しいマルチプレックスゲノム工学の方法を紹介しています. 精密で効率的なDNA改変を 2本鎖の断絶なしに可能にし 経路工学のための広範な遺伝的多様性を生み出します
科学分野:
- 分子生物学
- 合成生物学
- 遺伝学
背景:
- 現在のゲノム工学の方法は,しばしば二重鎖の断裂と同種の再結合に依存しており,これは意図しない変異につながる可能性があります.
- マルチプレックスゲノム工学は 複雑な遺伝的多様性を効率的に生み出すのに不可欠です
研究 の 目的:
- Saccharomyces cerevisiaeにおける新しい,効率的で正確なマルチプレックスゲノムエンジニアリング技術を開発する.
- 生物合成経路の組み合わせによる多様化のためのこの技術の能力を実証する.
主な方法:
- 合成オリゴヌクレオチドをDNA複製の遅延糸で利用した.
- Rad51指向の同型再結合と二重鎖DNA破裂の必要性を回避した.
- 複数のオリゴヌクレオチドと標的型変異の同時組み込みを達成した.
主要な成果:
- >40%の効率で単一の塩基対解像度で精密な染色体改変が実証されています.
- 一つの変換で最大12のオリゴヌクレオチドと60の変異を成功裏に組み込みました
- 繰り返し変換によって生成された 10^5を超える組み合わせゲノム多様性.
- 精密な変異により変異したカロテノイドレベルを持つ変種を生成する異質のβ-カロテンの生物合成経路を設計した.
結論:
- 開発された方法は,マルチプレックスゲノム工学のためのRad51独立の,二重鎖のブレイクフリーアプローチを提供します.
- この技術は高効率で精密で組み合わせられた ユーカリオットゲノムの改変を可能にします
- この戦略は自動化可能で,代謝工学を含む様々な用途に重要なゲノム多様性を生み出すために適用できます.
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