8UHD

Structure of paused transcription complex Pol II-DSIF-NELF - post-translocated

これはPDB形式変換不可エントリーです。

8UHD の概要

• エントリーDOI: 10.2210/pdb8uhd/pdb
• EMDBエントリー: 42270
• 分子名称: Negative elongation factor E, DNA-directed RNA polymerases I, II, and III subunit RPABC2, DNA-directed RNA polymerase II subunit RPB7, ... (23 entities in total)
• 機能のキーワード: nucleic acids, transcription, rna polymerase ii, nelf, dsif, pausing, transcription-dna-rna complex, transcription/dna/rna
• 由来する生物種: Homo sapiens (human); 詳細
• タンパク質・核酸の鎖数: 21
• 化学式量合計: 920787.89

構造登録者

Su, B.G.,Vos, S.M. (登録日: 2023-10-08, 公開日: 2024-03-20, 最終更新日: 2024-11-20)

主引用文献

Su, B.G.,Vos, S.M.
Distinct negative elongation factor conformations regulate RNA polymerase II promoter-proximal pausing.
Mol.Cell, 84:1243-, 2024

PubMed Abstract: Metazoan gene expression regulation involves pausing of RNA polymerase (Pol II) in the promoter-proximal region of genes and is stabilized by DSIF and NELF. Upon depletion of elongation factors, NELF appears to accompany elongating Pol II past pause sites; however, prior work indicates that NELF prevents Pol II elongation. Here, we report cryoelectron microscopy structures of Pol II-DSIF-NELF complexes with NELF in two distinct conformations corresponding to paused and poised states. The paused NELF state supports Pol II stalling, whereas the poised NELF state enables transcription elongation as it does not support a tilted RNA-DNA hybrid. Further, the poised NELF state can accommodate TFIIS binding to Pol II, allowing for Pol II reactivation at paused or backtracking sites. Finally, we observe that the NELF-A tentacle interacts with the RPB2 protrusion and is necessary for pausing. Our results define how NELF can support pausing, reactivation, and elongation by Pol II.

PubMed: 38401543
DOI: 10.1016/j.molcel.2024.01.023

実験手法

ELECTRON MICROSCOPY (2.8 Å)