ヒストンの減少はアルギニンのメチル化に敵対する
Graeme L Cuthbert1, Sylvain Daujat, Andrew W Snowden
1Gurdon Institute and Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QR, United Kingdom.
Cell
|September 2, 2004
まとめ
ペプチジルアルギニンデミナーゼ4 (PADI4) によるヒストンアルギニン減少は,アルギニンメチル化を防止することによって,活性転写を逆行します. この新しい減量プロセスは,遺伝子誘導を抑制し,表遺伝的調節に関する新しい洞察を提供します.
科学分野:
- エピジェネティクス エピジェネティクス
- 分子生物学は分子生物学である.
- 遺伝子規制 遺伝子規制
背景:
- ヒストンアルギニンメチル化は,活性遺伝子転写と関連しています.
- CARM1メチルトランスフェラーゼは,pS2のようなプロモーターに転写活性化のために採用されます.
- メチル化に対抗するプロセスであるデミネーションが導入されます.
研究 の 目的:
- 遺伝子調節におけるデミネーションの役割を調査する.
- ヒストンアルギニン減少の原因となる酵素を特定する.
- 劣化がアルギニンメチル化に敵対し,転写に影響を与えるかどうかを判断する.
主な方法:
- ヒストンH3に対するペプチジルアルギニンデミナーゼ4 (PADI4) の活性に関する特徴3.
- CARM1媒介によるアルギニンメチル化に対するPADI4減量の影響を評価する.
- PADI4の抑圧的な役割を評価するために,実験をターゲットにしたインビヴォのプロモーター.
主要な成果:
- PADI4はヒストンH3尾のアルギニン残基R2,R8,R17,R26を特異的に減少させる.
- PADI4による減少は,CARM1.1によるアルギニンメチル化を防ぐ.
- PADI4は,ホルモン受容体媒介の遺伝子誘導を抑制し,ダウン調節されたプロモーターに勧誘されます.
結論:
- 減量化は,ヒストンアルギニンメチル化によって媒介される転写活性化に敵対する新しい表遺伝的メカニズムである.
- PADI4媒介による減少は,遺伝子調節において抑制的な役割を果たします.
- デミネーションの理解は,異常遺伝子発現を含む疾患における治療的介入の新たなターゲットを提供します.
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