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-Structure paper
タイトル | Structure of paused transcription complex Pol II-DSIF-NELF. |
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ジャーナル・号・ページ | Nature, Vol. 560, Issue 7720, Page 601-606, Year 2018 |
掲載日 | 2018年8月22日 |
著者 | Seychelle M Vos / Lucas Farnung / Henning Urlaub / Patrick Cramer / |
PubMed 要旨 | Metazoan gene regulation often involves the pausing of RNA polymerase II (Pol II) in the promoter-proximal region. Paused Pol II is stabilized by the protein complexes DRB sensitivity-inducing factor ...Metazoan gene regulation often involves the pausing of RNA polymerase II (Pol II) in the promoter-proximal region. Paused Pol II is stabilized by the protein complexes DRB sensitivity-inducing factor (DSIF) and negative elongation factor (NELF). Here we report the cryo-electron microscopy structure of a paused transcription elongation complex containing Sus scrofa Pol II and Homo sapiens DSIF and NELF at 3.2 Å resolution. The structure reveals a tilted DNA-RNA hybrid that impairs binding of the nucleoside triphosphate substrate. NELF binds the polymerase funnel, bridges two mobile polymerase modules, and contacts the trigger loop, thereby restraining Pol II mobility that is required for pause release. NELF prevents binding of the anti-pausing transcription elongation factor IIS (TFIIS). Additionally, NELF possesses two flexible 'tentacles' that can contact DSIF and exiting RNA. These results define the paused state of Pol II and provide the molecular basis for understanding the function of NELF during promoter-proximal gene regulation. |
リンク | Nature / PubMed:30135580 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.2 - 3.9 Å |
構造データ | EMDB-0038, PDB-6gml: EMDB-0039: EMDB-0040: EMDB-0041: EMDB-0042: |
化合物 | ChemComp-MG: ChemComp-ZN: |
由来 |
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キーワード | TRANSCRIPTION / RNA polymerase II / pausing / NELF / DSIF |