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浸透性クロマチン-RNA結合タンパク質の相互作用は,RNAベースの転写の調節を可能にします
Rui Xiao1, Jia-Yu Chen2, Zhengyu Liang3
1Department of Cellular and Molecular Medicine, Institute of Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA; Medical Research Institute, Wuhan University, Wuhan, Hubei 430071, China.
Cell
|June 29, 2019
まとめ
RNA結合タンパク質 (RBPs) は,遺伝子転写とクロマチンの活性を直接調節することがますます判明しています. この研究は,遺伝子の発現に影響を与える,活発なヒトゲノム領域,特にプロモーターに広範囲にわたるRBP結合を明らかにしています.
科学分野:
- 分子生物学
- ゲノミクス
- エピジェネティクス
背景:
- 調節性RNAとRNA結合タンパク質 (RBPs) は,転写制御に関与している.
- クロマチンに対する直接的なRBP作用の程度は,大部分は特徴づけられていない.
研究 の 目的:
- RBPsと活性クロマチン領域の全ゲノム関連性を調査する.
- RBP,転写因子 (TF),および転写出力の間の機能的関係を決定する.
主な方法:
- ヒトゲノムにおける大規模RNA結合タンパク質ChIP-seq (クロマチン免疫降水配列) 解析
- RBPとTFの共同関連性を特定するために,監視されていないクラスタリング.
- TFに依存する活動への影響を評価するために,RBPの枯渇 (例えば,RBM25) を含む機能分析.
主要な成果:
- 活性クロマチンの領域にRBPが広く存在し,遺伝子プロモーターが好まれる.
- RBPは,YY1とRBM25のようなTFとの共同関連パターンを示しています.
- RBM25の枯渇は,YY1媒介の染色体結合,DNAループ,および転写を著しく損なう.
結論:
- RBPsは活性クロマチンと直接かつ広範に接触し,遺伝子転写に影響を与えます.
- RBPとTFは遺伝子発現を制御するために,制御RNAによって媒介される可能性がある複雑なネットワークを形成する.
- RBM25のような特定のRBPは,TF依存の転写調節において重要な役割を果たしている.
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