遺伝子転写を強化するDNAメチレーションリーダーの複合体
C Jake Harris1, Marion Scheibe2, Somsakul Pop Wongpalee1
1Department of Molecular, Cell and Developmental Biology, University of California at Los Angeles, Los Angeles, CA 90095, USA.
まとめ
研究者たちは アラビドプシスのメチル化DNAを結合する タンパク質を特定しました これらのSUVH1とSUVH3は DNAJタンパク質を駆使して 遺伝子の発現を促進し 静止効果を相殺します
科学分野:
- 植物分子生物学
- エピジェネティクス
- 遺伝子調節
背景:
- DNAメチル化は通常 遺伝子発現を抑制しますが 活性化することもできます
- これらの効果を媒介する下流の要因はほとんど不明です.
- これらの因子を理解することは 遺伝子調節を解読するのに不可欠です
研究 の 目的:
- アラビドプシス・タリアナのメチル化DNAと相互作用するタンパク質を特定する.
- 遺伝子発現におけるメチル結合タンパク質の機能を明らかにする.
- DNAメチル化が遺伝子転写に影響を与えるメカニズムを調査する.
主な方法:
- メチル化DNAに関連するタンパク質を分離するための比較インタラクタミクス.
- DNAメチル化結合を確認するためのインビトロ結合測定法.
- ユークロマティックメチル化との関連性研究
- DNAJドメインを含むタンパク質による複合形成分析
主要な成果:
- 2つのSU(VAR) 3−9同種SUVH1とSUVH3がメチル結合タンパク質として識別された.
- SUVH1とSUVH3はメチル化DNAと結合し,ユークロマティックメチル化に関連しています.
- これらのタンパク質はDNAJ1とDNAJ2と複合体を形成する.
- DNAJ1の子宮外発現は,異なる種間の遺伝子転写を強化した.
結論:
- SUVHタンパク質はメチル化DNAとDNAJタンパク質を結合する.
- この相互作用は近隣の遺伝子発現を高める.
- SUVH-DNAJ複合体は,遺伝子の近くのトランポゾン挿入の抑制効果に対抗する.
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