遺伝子プロモーターの長距離相互作用の景色
Amartya Sanyal1, Bryan R Lajoie, Gaurav Jain
1Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605-0103, USA.
Nature
|September 8, 2012
まとめ
この研究は5Cを用いてゲノム相互作用をマッピングし,規制要素と遺伝子の間の複雑な3Dネットワークを明らかにした. これらの発見は,非コーディングDNAが遺伝子発現と病気にどのように影響するかを明らかにしています.
科学分野:
- ゲノミクスゲノミクスとは
- 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.
背景:
- コード化されていないヒトゲノムには,機能的要素と疾患に関連した変種が含まれています.
- 調節要素と標的遺伝子の相互作用を制御する原理は,ほとんど不明である.
- 染色体ループは遺伝子調節に関与しています.
研究 の 目的:
- 転写開始部位 (TSSs) とヒトゲノムのディスタル要素との相互作用を包括的にマッピングする.
- これらの長距離ゲノム相互作用の原理と,遺伝子調節におけるその役割を理解する.
主な方法:
- 染色体適合捕獲炭素コピー (5C) は,ENCODEのパイロット地域に適用されました.
- 5Cマップは,GM12878,K562,HeLa-S3細胞系のために生成されました.
- データはENCODEコンソーシアムのデータセットと統合されました.
主要な成果:
- プロモーターと遠隔部位 (エンハンサー,プロモーター,CTCF結合部位) の間の1000以上の長距離相互作用が細胞系ごとに特定されました.
- 遺伝子発現は,プロモーター・エンハンサー相互作用とエンハンサーRNAと相関する.
- 相互作用は上流バイアスを示し,しばしばCTCF/コヘシンによってブロックを解除され,最も近い遺伝子をめったに関与しませんでした.
結論:
- 遺伝子と規制要素は複雑な3Dネットワークを形成し,ゲノムの近さによってのみ決定されるものではありません.
- これらの相互作用は,遺伝子調節と疾患メカニズムを理解するための重要な文脈を提供します.
- この研究は,ヒトゲノムの3次元の組織に関する新しい洞察を明らかにしています.
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