3e6c | pdb_00003e6c

CprK OCPA DNA Complex

spinqualitylabelsall models 3e6c, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3e6c is a 3 chain structure with sequence from Deshd. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 3C4 Related: 3e5q, 3e5u, 3e6x, 3e6b, 3e6d Gene: Dhaf_0678 (DESHD) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 Certain bacteria are able to conserve energy via the reductive dehalogenation of halo-organic compounds in a respiration-type metabolism. The transcriptional regulator CprK from Desulfitobacterium spp. induces expression of halorespiratory genes upon binding of o-chlorophenol ligands and is reversibly inactivated by oxygen through disulphide bond formation. We report crystal structures of D. hafniense CprK in the ligand-free (both oxidation states), ligand-bound (reduced) and DNA-bound states, making it the first member of the widespread CRP-FNR superfamily for which a complete structural description of both redox-dependent and allosteric molecular rearrangements is available. In conjunction with kinetic and thermodynamic ligand binding studies, we provide a model for the allosteric mechanisms underpinning transcriptional control. Amino acids that play a key role in this mechanism are not conserved in functionally distinct CRP-FNR members. This suggests that, despite significant structural homology, distinct allosteric mechanisms are used, enabling this protein family to control a very wide range of processes. Molecular basis of halorespiration control by CprK, a CRP-FNR type transcriptional regulator.,Levy C, Pike K, Heyes DJ, Joyce MG, Gabor K, Smidt H, van der Oost J, Leys D Mol Microbiol. 2008 Oct;70(1):151-67. Epub 2008 Aug 20. PMID:18717788 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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