2ksu

Redox linked conformational changes in cytochrome C3 from Desulfovibrio desulfuricans ATCC 27774

spinqualitylabelsall models 2ksu, 20 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2ksu is a 1 chain structure with sequence from Desulfovibrio desulfuricans. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HEC Related: 2kmy 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 Cytochrome c3 from Desulfovibrio desulfuricans ATCC 27774 appears to be capable of receiving two protons and two electrons from hydrogenase for transport to the membrane, and converting electronic energy into proton motive force. Detailed studies of the mechanism require control both of the redox state and of the protonation state of the protein; hence, structure determination of the protein in solution by NMR is the preferred method. This work compares the structures of the protonated protein in the fully oxidized and fully reduced states as a first step toward elucidating the pH-dependent and redox-state-dependent conformational changes that drive the energy transduction. These high-resolution structures revealed significant localized differences upon change of redox state, even though the global folds of the two families of structures are similar. There are concerted redox-linked motions within the protein that bring E61 and K75 closer to heme II in the oxidized form. This is consistent with an electrostatically driven movement that may provide an important contribution to the previously measured positive cooperativity between hemes I and II. No significant conformational changes were observed that might be related to redox-Bohr effects; the families of structures represent mainly protonated forms, and therefore, pH dependence should not play a major role in the observed structural rearrangements. Redox linked conformational changes in cytochrome c3 from Desulfovibrio desulfuricans ATCC 27774.,Paixao VB, Vis H, Turner DL Biochemistry. 2010 Nov 9;49(44):9620-9. PMID:20886839 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cytochrome C 3D structures

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