CRISPRで誘導されるDNAポリメラーゼは,調整可能なウィンドウですべてのヌクレオチドの多様化を可能にします
Shakked O Halperin1,2,3, Connor J Tou1, Eric B Wong1
1Department of Bioengineering, University of California, Berkeley, Berkeley, CA, USA.
Nature
|August 3, 2018
まとめ
研究者はEvolvRという 継続的な遺伝子コードの多様化システムを開発しました このCRISPRによる DNAポリメラーゼツールは 生物工学のための 急速なゲノム編集と 新しい特性の発見を可能にします
科学分野:
- 分子生物学
- 遺伝学
- バイオテクノロジー
背景:
- 遺伝子コードの多様化は 生物学的システムを理解し 設計するのに不可欠です
- ゲノム多様化のための既存の方法は,特定の生物学的システムとアプリケーションに制限があります.
- 標的型変異,加速進化,細胞系追跡のための効率的な方法が必要である.
研究 の 目的:
- ユーザー定義のゲノム領域の継続的な多様化のための新しいシステムであるEvolvRを紹介します.
- 遺伝学的なアプローチと 望ましい表型の急速な進化を可能にします
- バーコード変異による細胞系統の追跡を容易にする.
主な方法:
- 設計されたDNAポリメラーゼを標的とするCRISPR誘導ニカゼを用いたシステムであるEvolvRを開発した.
- エンジニアリングされたDNAポリメラーゼは,ユーザが定義した位置で,調整可能なウィンドウの長さ内で直接変異を生成します.
- 特定のニカゼとポリメラーゼの変種を特定し,かなり高い変異率を達成した.
主要な成果:
- EvolvRの突然変異率は 野生型細胞の7,77万倍にも上ります
- このシステムは,最大350の核酸のウィンドウを編集することができます.
- EvolvRを用いてスペクトノミシン耐性を与える新しいリボソーム変異を成功裏に特定した.
結論:
- CRISPRによるDNAポリメラーゼは,ゲノムロキーの多重化と連続的な多様化を可能にします.
- EvolvRは基礎研究とバイオテクノロジーの応用のための強力なツールです.
- このシステムは遺伝子工学,進化研究,合成生物学などに広く利用できる.
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