多重トランスクリプト分裂は,RNAポリメラーゼIIによる終結におけるポリメラーゼ放出に先行する
1Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, United Kingdom.
Cell
|June 8, 2001
まとめ
RNAポリメラーゼII (pol II) の転写終結には,2つの異なるイベントが含まれます:下流配列によって媒介されるプレターミネーションクリバージ (PTC) と,PTCとポリAサイトの両方を必要とするポリメラーゼ解約.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝子発現の表現について
- バイオケミストリー バイオケミストリー
背景:
- ポリアデニレーション (poly(A)) 信号は,RNAポリメラーゼII (pol II) の転写終結に不可欠であることが知られている.
- pol IIトランスクリプションの終結を制御する正確なメカニズムは,ほとんど解明されていないままです.
研究 の 目的:
- RNAポリメラーゼIIの転写終了に関与する連続的なイベントを調査する.
- 終結プロセスにおける下流配列とポリ (A) サイトの役割を明らかにする.
主な方法:
- 人間のβおよびepsilon-globin遺伝子からの新生トランスクリプトの分析.
- プリターミネーション・クリバージ (PTC) イベントの識別と特徴付け.
主要な成果:
- Pol IIの転写終了は,2つの異なる,一時的に分離されたイベントで構成されています.
- プリデミネーション・クリバージ (PTC) は,ポリ (A) サイトの下流の配列経路によって促進され,異質なトランスクリプト・クリバージを引き起こします.
- DNAテンプレートからポリメラーゼの解約は,PTC配列と機能的なpoly (A) サイトの両方の事前の転写を必要とします.
結論:
- RNAポリメラーゼIIによる転写終結は,多段階のプロセスです.
- シーケンス要素は,ポリ (A) サイトの下流で,プレターミネーション・クリバージュによるターミネーションを開始する上で重要な役割を果たします.
- 効率的な解消には,前解消割れとポリアデニレーション信号の両方の協調的な作用が必要です.
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