7PY7
CryoEM structure of E.coli RNA polymerase elongation complex bound to NusA and NusG (NusA and NusG elongation complex in more-swiveled conformation)
Summary for 7PY7
| Entry DOI | 10.2210/pdb7py7/pdb |
| EMDB information | 13715 |
| Descriptor | ntDNA, MAGNESIUM ION, ZINC ION, ... (11 entities in total) |
| Functional Keywords | nusa and nusg, transcription elongation, cryo-em, transcription |
| Biological source | Escherichia coli More |
| Total number of polymer chains | 10 |
| Total formula weight | 493697.02 |
| Authors | Zhu, C.,Guo, X.,Weixlbaumer, A. (deposition date: 2021-10-09, release date: 2022-03-23, Last modification date: 2024-07-17) |
| Primary citation | Zhu, C.,Guo, X.,Dumas, P.,Takacs, M.,Abdelkareem, M.,Vanden Broeck, A.,Saint-Andre, C.,Papai, G.,Crucifix, C.,Ortiz, J.,Weixlbaumer, A. Transcription factors modulate RNA polymerase conformational equilibrium. Nat Commun, 13:1546-1546, 2022 Cited by PubMed Abstract: RNA polymerase (RNAP) frequently pauses during the transcription of DNA to RNA to regulate gene expression. Transcription factors NusA and NusG modulate pausing, have opposing roles, but can bind RNAP simultaneously. Here we report cryo-EM reconstructions of Escherichia coli RNAP bound to NusG, or NusA, or both. RNAP conformational changes, referred to as swivelling, correlate with transcriptional pausing. NusA facilitates RNAP swivelling to further increase pausing, while NusG counteracts this role. Their structural effects are consistent with biochemical results on two categories of transcriptional pauses. In addition, the structures suggest a cooperative mechanism of NusA and NusG during Rho-mediated transcription termination. Our results provide a structural rationale for the stochastic nature of pausing and termination and how NusA and NusG can modulate it. PubMed: 35318334DOI: 10.1038/s41467-022-29148-0 PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (4.1 Å) |
Structure validation
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