SWI/SNFファミリーのクロマチンの改造複合体のモジュール式組織と組み立て
Nazar Mashtalir1, Andrew R D'Avino1, Brittany C Michel2
1Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02215, USA; Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
Cell
|October 23, 2018
まとめ
哺乳類のSWI/SNF (mSWI/SNF) 複合体は,ゲノム調節に不可欠であり,疾患に関与しています. この研究により,モジュール型の組織と組み立ての経路が明らかになり,将来の構造的および機能的研究に役立ちます.
科学分野:
- 分子生物学
- ゲノミクス
- 生物化学
背景:
- 哺乳類のSWI/SNF (mSWI/SNF) コンプレックスは,ATP依存の染色体リモデラーであり,ゲノム調節に不可欠である.
- mSWI/SNF複合体の障害はヒトの癌および発達障害と関連しています.
- これらの複合体のモジュール式組織と組み立て経路は,大部分が特徴づけられていない.
研究 の 目的:
- mSWI/SNF複合体の3つの主要なクラスであるBAF,PBAF,ncBAFのアーキテクチャとアセンブリ経路を解明する.
- 複合体の形成と安定性における個々のサブユニットの役割を定義する.
- 複雑な構造とサブユニットの相互作用の文脈の中で病気に関連した変異をマッピングする.
主な方法:
- 哺乳類とドロソフィラの細胞からの内生的なmSWI/SNF複合体の親和性浄化.
- サブユニットの近接と相互作用を決定するクロスリンクマッサスペクトロメトリー (CX-MS).
- 複合的な組み立てと安定性のためのサブユニットの必要性を評価するサイト指向型変異.
主要な成果:
- mSWI/SNF複合体内の3つの異なる,進化的に保存されたモジュールユニットの識別.
- 複合的な組み立ての過程でこれらのモジュールの順次組み込みの特徴
- 特定されたモジュール内の特定のサブユニットとトポロジック領域への疾患関連変異のマッピング.
結論:
- この研究は,mSWI/SNFの複雑なアーキテクチャとアセンブリを理解するための包括的な枠組みを提供します.
- この知識は,癌や発達障害における変異の機能的影響を解読するのに不可欠です.
- この発見は,これらの重要なクロマチンの調節器の構造と機能に関する将来の調査の道を開きます.
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