ヒストンH3メチルトランスフェラーゼは,Neurospora crassaのDNAメチル化を制御する
1Institute of Molecular Biology, University of Oregon, Eugene 97403-1229, USA.
Nature
|November 20, 2001
まとめ
ニューロスポラ・クラッサ (Neurospora crassa) とは
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.
- 遺伝学 遺伝学とは
背景:
- DNAメチル化は,X染色体不活性化および遺伝子静止を含む表遺伝的調節に不可欠です.
- dim-2遺伝子は,Neurospora crassa.でサイトシンメチル化に関与するDNAメチルトランスフェラーゼをコードする.
研究 の 目的:
- Neurospora crassaのDNAメチル化に関与する新しい遺伝子を特定する.
- DNAメチル化とヒストンの改変の関係を解明する.
主な方法:
- 遺伝子マッピングと変異による識別.
- dim-5遺伝子のSETドメインにおけるナンセンス変異の分析.
- 再結合タンパク質発現とヒストンメチル化アッセイ.
- ヒストンH3のサイト指向型変異.
主要な成果:
- ニューロスポラ遺伝子のdim-5は,DNAメチル化,正常な成長,そして生育に不可欠です.
- ヒストンメチルトランスフェラーゼに関連する遺伝子であるdim-5の突然変異は,DNAメチル化を妨げます.
- リコンビナントDIM-5タンパク質メチラート ヒストンH3ライシン 9.
- ヒストンH3の変異はdim-5現象型を模倣する.
結論:
- Neurospora crassaのDNAメチル化はヒストンのメチル化に依存しています.
- dim-5遺伝子産物であるDIM-5は,ヒストンメチル化とDNAメチル化を結びつける上で重要な役割を果たしています.
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