1sig | pdb_00001sig

CRYSTAL STRUCTURE OF A SIGMA70 SUBUNIT FRAGMENT FROM ESCHERICHIA COLI RNA POLYMERASE

spinqualitylabelsall models 1sig, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1sig is a 1 chain structure with sequence from Ecoli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: RPOD (ECOLI) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [RPOD_ECOLI] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This is the primary sigma factor of this bacterium. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The 2.6 A crystal structure of a fragment of the sigma 70 promoter specificity subunit of E. coli RNA polymerase is described. Residues involved in core RNA polymerase binding lie on one face of the structure. On the opposite face, aligned along one helix, are exposed residues that interact with the -10 consensus promoter element (the Pribnow box), including four aromatic residues involved in promoter melting. The structure suggests one way in which DNA interactions may be inhibited in the absence of RNA polymerase and provides a framework for the interpretation of a large number of genetic and biochemical analyses. Crystal structure of a sigma 70 subunit fragment from E. coli RNA polymerase.,Malhotra A, Severinova E, Darst SA Cell. 1996 Oct 4;87(1):127-36. PMID:8858155 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Sigma factor

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