HUHタグを使用した単一のステップで配列指向の共性タンパク質-DNA結合
Klaus N Lovendahl1, Amanda N Hayward1, Wendy R Gordon1
1Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota , Minneapolis, Minnesota 55455, United States.
Journal of the American Chemical Society
|May 9, 2017
まとめ
タンパク質とDNAを 結合させるための HUHタグを開発しました これらのタグはDNA配列に特異的に反応し,遺伝子編集,単一分子研究,細胞イメージングの応用が可能です.
科学分野:
- 生物化学
- 分子生物学
- 化学生物学
背景:
- タンパク質とDNAの共性結合は様々な生物学的プロセスとバイオテクノロジーの応用において極めて重要です.
- タンパク質-DNA結合の既存の方法はしばしば改変されたDNAを必要とし,特異性が欠けている.
- 生物系における効率的で特定のタンパク質-DNA結合には新しい戦略が必要である.
研究 の 目的:
- タンパク質とDNAを共性的に結合する 堅牢で多用途な方法を開発する
- 特定のDNA配列認識のための融合パートナー (HUH-タグ) としてHUH-エンドヌクレアースドメインを識別し,特徴づけること.
- 遺伝子編集,単分子研究,細胞イメージングにおけるHUHタグの有用性を実証する.
主な方法:
- HUHエンドヌクレアースドメインを融合タンパク質 (HUHタグ) として設計する.
- 改変されていない単一鎖DNA配列でHUHタグの反応性をテストする.
- 異なるDNA配列を認識する直交のHUHタグを識別する.
- Cas9による遺伝子編集システムに HUHタグを統合する
- 単一分子の実験のために DNAを二重結合したタンパク質を 作る
- 生体細胞と固定細胞の細胞イメージングに HUH タグを適用する.
主要な成果:
- HUHタグは,特定の,未修正の単一鎖DNA配列との強固な共性結合を示す.
- 5つの異なるHUHタグが特定され,異なるDNA配列で直交反応を示した.
- HUHタグは,Cas9遺伝子編集における融合パートナーとして成功裏に採用されました.
- 先進的な単一分子研究のために,二重DNA結合タンパク質が構築されました.
- この方法は,生細胞と固定細胞の両方の細胞イメージングアプリケーションで検証されました.
結論:
- HUHタグは,共性タンパク質-DNA結合のための多用途で堅牢なプラットフォームを提供します.
- 特定されたHUHタグの正交性は,複雑な生物系におけるその有用性を拡大する.
- HUHタグ技術は,遺伝子編集,単分子生物物理学,および生細胞画像の進歩に重要な可能性を秘めています.
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