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Overexpressing Long Noncoding RNAs Using Gene-activating CRISPR
Published on: March 1, 2019
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アクティベーションRNAはメディエーターと結合し,染色体構造と転写を強化する
Fan Lai1, Ulf A Orom, Matteo Cesaroni
1The Wistar Institute, 3601 Spruce Street, Philadelphia, Pennsylvania 19104, USA.
Nature
|February 19, 2013
まとめ
長い非コーディングRNA (lncRNA) の活性化により,仲介者複合体が隣接する遺伝子を活性化します. この相互作用は遺伝子調節に極めて重要であり,病気では障害があり,ncrna-a機能におけるメディエーターの役割を強調しています.
科学分野:
- ゲノミクスゲノミクスとは
- 分子生物学は分子生物学である.
- エピジェネティクス エピジェネティクス
背景:
- ゲノム研究により,ロングノンコーディングRNA (lncRNAs) を含む多数の非タンパク質コーディングトランスクリプトが明らかになりました.
- lncRNAはX染色体不活性化などの表遺伝的役割が知られているが,その多様な機能は調査中である.
- 特定のクラスであるncRNA活性化 (ncRNA-a) は,cis媒介メカニズムを通じて隣接する遺伝子を活性化します.
研究 の 目的:
- 強化剤のようなncRNA-a機能の正確なメカニズムを解明する.
- ncRNA依存遺伝子の活性化における転写共活性化器複合体の構成要素の役割を決定する.
- 遺伝子調節におけるncRNA-aとメディエーター複合体の相互作用を調査する.
主な方法:
- 人間のHEK293細胞における既知の転写活性化因子の減少.
- ヘテロログなレポーターアッセイは,RNA依存の転写活性化を評価する.
- メディエーターの募集,クロマチンの局所化,キナーゼ活性アッセイを含むイン・ビヴォ研究.
- ncRNA-aロシと標的遺伝子の間のDNAループを分析するために染色体構成のキャプチャ.
主要な成果:
- メディエーター複合体の構成要素の枯渇により,ncRNA-a誘発の転写が著しく減少した.
- メディエーター複合体は,ncRNA-a標的遺伝子にインビヴォで誘導され,その発現を調節する.
- ncRNA-aはメディエーターと相互作用し,そのクロマチンの局所化とヒストンH3セリン10キナーゼ活性に影響を与えます.
- 病気に関連したメディエーター複合体は,活性化するncRNAsとの相互作用が減少していることを示しています.
- 媒介体またはncRNA-aの枯渇は,ncRNA-aの位置と標的遺伝子の間のDNAループを妨げました.
結論:
- 人間のメディエーター複合体は,ncRNAsを活性化するためのトランスデューサーとして作用する.
- メディエーターとアクティベーションするncRNAとの関連は,遺伝子調節において極めて重要です.
- メディエーターの機能障害とncRNAの相互作用の活性化がヒトの病気に関与している.
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