Download MendeleyStructural basis of DNA recognition by the alternative sigma-factor, sigma54.
Doucleff, M., Pelton, J.G., Lee, P.S., Nixon, B.T., Wemmer, D.E.(2007) J Mol Biol 369: 1070-1078
- PubMed: 17481658
- DOI: https://doi.org/10.1016/j.jmb.2007.04.019
- Primary Citation of Related Structures:
2O8K, 2O9L - PubMed Abstract:
The sigma subunit of bacterial RNA polymerase (RNAP) regulates gene expression by directing RNAP to specific promoters. Unlike sigma(70)-type proteins, the alternative sigma factor, sigma(54), requires interaction with an ATPase to open DNA. We present the solution structure of the C-terminal domain of sigma(54) bound to the -24 promoter element, in which the conserved RpoN box motif inserts into the major groove of the DNA. This structure elucidates the basis for sequence specific recognition of the -24 element, orients sigma(54) on the promoter, and suggests how the C-terminal domain of sigma(54) interacts with RNAP.
Organizational Affiliation:
Physical Biosciences Division, Lawrence Berkeley National Laboratory and the Department of Chemistry, University of California, Berkeley, CA 94720, USA.
