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6RIP

Cryo-EM structure of E. coli RNA polymerase backtracked elongation complex in swiveled state

6RIP の概要
エントリーDOI10.2210/pdb6rip/pdb
関連するPDBエントリー6RH3 6RI7 6RI9 6RIN
EMDBエントリー4893
分子名称Non-template DNA, Template DNA, DNA-directed RNA polymerase subunit alpha, ... (9 entities in total)
機能のキーワードe. coli rna polymerase, backtracking, elongation complex, transcription
由来する生物種Escherichia coli (strain K12)
詳細
タンパク質・核酸の鎖数8
化学式量合計418179.75
構造登録者
Abdelkareem, M.,Saint-Andre, C.,Takacs, M.,Papai, G.,Crucifix, C.,Guo, X.,Ortiz, J.,Weixlbaumer, A. (登録日: 2019-04-24, 公開日: 2019-07-03, 最終更新日: 2024-05-22)
主引用文献Abdelkareem, M.,Saint-Andre, C.,Takacs, M.,Papai, G.,Crucifix, C.,Guo, X.,Ortiz, J.,Weixlbaumer, A.
Structural Basis of Transcription: RNA Polymerase Backtracking and Its Reactivation.
Mol.Cell, 75:298-309.e4, 2019
Cited by
PubMed Abstract: Regulatory sequences or erroneous incorporations during DNA transcription cause RNA polymerase backtracking and inactivation in all kingdoms of life. Reactivation requires RNA transcript cleavage. Essential transcription factors (GreA and GreB, or TFIIS) accelerate this reaction. We report four cryo-EM reconstructions of Escherichia coli RNA polymerase representing the entire reaction pathway: (1) a backtracked complex; a backtracked complex with GreB (2) before and (3) after RNA cleavage; and (4) a reactivated, substrate-bound complex with GreB before RNA extension. Compared with eukaryotes, the backtracked RNA adopts a different conformation. RNA polymerase conformational changes cause distinct GreB states: a fully engaged GreB before cleavage; a disengaged GreB after cleavage; and a dislodged, loosely bound GreB removed from the active site to allow RNA extension. These reconstructions provide insight into the catalytic mechanism and dynamics of RNA cleavage and extension and suggest how GreB targets backtracked complexes without interfering with canonical transcription.
PubMed: 31103420
DOI: 10.1016/j.molcel.2019.04.029
主引用文献が同じPDBエントリー
実験手法
ELECTRON MICROSCOPY (3.4 Å)
構造検証レポート
Validation report summary of 6rip
検証レポート(詳細版)ダウンロードをダウンロード

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件を2025-04-09に公開中

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