6J9E

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

Summary for 6J9E

• Entry DOI: 10.2210/pdb6j9e/pdb
• EMDB information: 9785
• Descriptor: DNA-directed RNA polymerase subunit alpha, MAGNESIUM ION, ZINC ION, ... (11 entities in total)
• Functional Keywords: rna polymerase, transcription termination, anti-termination, rnap clamp, phage, transcription initiation, p7, nusa, xanthomonos oryzae, xp10, transcription
• Biological source: Xanthomonas oryzae pv. oryzae (strain PXO99A); More
• Total number of polymer chains: 10
• Total formula weight: 485392.07

Authors

You, L.L.,Zhang, Y. (deposition date: 2019-01-22, release date: 2019-07-17, Last modification date: 2024-03-27)

Primary citation

You, L.,Shi, J.,Shen, L.,Li, L.,Fang, C.,Yu, C.,Cheng, W.,Feng, Y.,Zhang, Y.
Structural basis for transcription antitermination at bacterial intrinsic terminator.
Nat Commun, 10:3048-3048, 2019

PubMed Abstract: 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 Å and 4.0 Å 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.

PubMed: 31296855
DOI: 10.1038/s41467-019-10955-x

Experimental method

ELECTRON MICROSCOPY (3.41 Å)