6j9e

Cryo-EM structure of Xanthomonos oryzae transcription elongation complex with NusA and the bacteriophage protein P7Cryo-EM structure of Xanthomonos oryzae transcription elongation complex with NusA and the bacteriophage protein P7

6j9e, resolution 3.41Å Show:Asymmetric Unit Biological Assembly Structural highlights 6j9e is a 10 chain structure with sequence from Xanoo, Xanop and Xanthomonas campestris phage xp10. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Gene: rpoA, PXO_04496 (XANOP), rpoB, PXO_04530 (XANOP), rpoC, PXO_04529 (XANOP), rpoZ (XANOO), nusA (XANOP) Activity: DNA-directed RNA polymerase, with EC number 2.7.7.6 Experimental data: Check Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [RPOC_XANOP] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [RPOB_XANOP] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [RPOA_XANOP] DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. [A0A0U4VN94_XANOO] Promotes RNA polymerase assembly. Latches the N- and C-terminal regions of the beta' subunit thereby facilitating its interaction with the beta and alpha subunits.[HAMAP-Rule:MF_00366][SAAS:SAAS00387808] Publication Abstract from PubMed Bacteriophages typically hijack the host bacterial transcriptional machinery to regulate their own gene expression and that of the host bacteria. The structural basis for bacteriophage protein-mediated transcription regulation-in particular transcription antitermination-is largely unknown. Here we report the 3.4 A and 4.0 A cryo-EM structures of two bacterial transcription elongation complexes (P7-NusA-TEC and P7-TEC) comprising the bacteriophage protein P7, a master host-transcription regulator encoded by bacteriophage Xp10 of the rice pathogen Xanthomonas oryzae pv. Oryzae (Xoo) and discuss the mechanisms by which P7 modulates the host bacterial RNAP. The structures together with biochemical evidence demonstrate that P7 prevents transcription termination by plugging up the RNAP RNA-exit channel and impeding RNA-hairpin formation at the intrinsic terminator. Moreover, P7 inhibits transcription initiation by restraining RNAP-clamp motions. Our study reveals the structural basis for transcription antitermination by phage proteins and provides insights into bacterial transcription regulation. Structural basis for transcription antitermination at bacterial intrinsic terminator.,You L, Shi J, Shen L, Li L, Fang C, Yu C, Cheng W, Feng Y, Zhang Y Nat Commun. 2019 Jul 11;10(1):3048. doi: 10.1038/s41467-019-10955-x. PMID:31296855 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also RNA polymerase 3D structures