3mlq

Publication Abstract from PubMed

The transcription-repair coupling factor (TRCF, the product of the mfd gene) is a widely conserved bacterial protein that mediates transcription-coupled DNA repair. TRCF uses its ATP-dependent DNA translocase activity to remove transcription complexes stalled at sites of DNA damage, and stimulates repair by recruiting components of the nucleotide excision repair pathway to the site. A protein/protein interaction between TRCF and the beta-subunit of RNA polymerase (RNAP) is essential for TRCF function. CarD (also called CdnL), an essential regulator of rRNA transcription in Mycobacterium tuberculosis, shares a homologous RNAP interacting domain with TRCF and also interacts with the RNAP beta-subunit. We determined the 2.9-A resolution X-ray crystal structure of the RNAP interacting domain of TRCF complexed with the RNAP-beta1 domain, which harbors the TRCF interaction determinants. The structure reveals details of the TRCF/RNAP protein/protein interface, providing a basis for the design and interpretation of experiments probing TRCF, and by homology CarD, function and interactions with the RNAP.

Structural basis for the bacterial transcription-repair coupling factor/RNA polymerase interaction.,Westblade LF, Campbell EA, Pukhrambam C, Padovan JC, Nickels BE, Lamour V, Darst SA Nucleic Acids Res. 2010 Aug 11. PMID:20702425^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.