2o8k
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(New page: 200px<br /><applet load="2o8k" size="350" color="white" frame="true" align="right" spinBox="true" caption="2o8k" /> '''NMR Structure of the Sigma-54 RpoN Domain Bo...)
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Revision as of 12:31, 23 January 2008
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NMR Structure of the Sigma-54 RpoN Domain Bound to the-24 Promoter Element
Overview
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.
About this Structure
2O8K is a Single protein structure of sequence from Aquifex aeolicus. Full crystallographic information is available from OCA.
Reference
Structural basis of DNA recognition by the alternative sigma-factor, sigma54., Doucleff M, Pelton JG, Lee PS, Nixon BT, Wemmer DE, J Mol Biol. 2007 Jun 15;369(4):1070-8. Epub 2007 Apr 12. PMID:17481658
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