ヒストンH2BモノウビキチネーションはFACTと連携して機能し,RNAポリメラーゼIIによる延長を調節する
Rushad Pavri1, Bing Zhu, Guohong Li
1Howard Hughes Medical Institute, Department of Biochemistry, Division of Nucleic Acids Enzymology, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, 683 Hoes Lane, Piscataway, NJ 08854, USA.
Cell
|May 23, 2006
まとめ
転写活性のマーカーであるヒストンH2Bモノビキチネーションは,RNF20/40とUbcH6.6によって確立されています. このプロセスは,クロマチンを介してRNAポリメラーゼIIの延長を促進する転写因子を必要とします.
科学分野:
- 分子生物学は分子生物学である.
- エピジェネティクス エピジェネティクス
- 遺伝子規制 遺伝子規制
背景:
- ヒストンの翻訳後の改変は,染色体の構造を変えることで遺伝子発現を調節する.
- ヒストンH2Bモノウビキチネーションは活性転写と関連しているが,その確立と延長における役割は十分に理解されていない.
研究 の 目的:
- ヒストンH2Bモノウビキチネーションを確立する分子メカニズムを調査する.
- RNAポリメラーゼIIの転写延長におけるH2Bモヌビキチネーションの役割を明らかにする.
主な方法:
- 誘導可能なプロモーターを伴う復元されたクロマチンの転写システムを使用した.
- タンパク質とDNAの相互作用とトランスクリプト生成を分析するために,in vitroおよびin vivo実験で使われています.
主要な成果:
- ヒストンH2Bモノウビキチネーションの確立は,転写,PAF複合体,およびFACTチャペロンに依存しています.
- H2BモノウビキチネーションはFACTの機能を強化し,トランスクリプトの延長とより長いRNAの合成を促進します.
- 核細胞を通してRNAポリメラーゼIIの延長には,FACTとPAFとH2Bのモヌビキチネーション装置の採用が最小限に必要とされています.
結論:
- ヒストンH2Bモノウビキチネーションは,効率的なトランスクリプト延長に不可欠なトランスクリプション依存プロセスです.
- FACT複合体とPAF/H2Bモノウビキチネーション機構は,RNAポリメラーゼIIが核分裂体を通過する際の重要な調節因子である.
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