1gmb

Reduced structure of CYTOCHROME C3 FROM DESULFOVIBRIO DESULFURICANS ATCC 27774 at pH 7.6

spinqualitylabelsall models 1gmb, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1gmb is a 1 chain structure with sequence from Desulfovibrio desulfuricans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HEC, SO4 Related: 1gm4, 3cyr 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 Cell metabolism relies on energy transduction usually performed by complex membrane-spanning proteins that couple different chemical processes, e.g. electron and proton transfer in proton-pumps. There is great interest in determining at the molecular level the structural details that control these energy transduction events, particularly those involving multiple electrons and protons, because tight control is required to avoid the production of dangerous reactive intermediates. Tetraheme cytochrome c(3) is a small soluble and monomeric protein that performs a central step in the bioenergetic metabolism of sulfate reducing bacteria, termed "proton-thrusting," linking the oxidation of molecular hydrogen with the reduction of sulfate. The mechano-chemical coupling involved in the transfer of multiple electrons and protons in cytochrome c(3) from Desulfovibrio desulfuricans ATCC 27774 is described using results derived from the microscopic thermodynamic characterization of the redox and acid-base centers involved, crystallographic studies in the oxidized and reduced states of the cytochrome, and theoretical studies of the redox and acid-base transitions. This proton-assisted two-electron step involves very small, localized structural changes that are sufficient to generate the complex network of functional cooperativities leading to energy transduction, while using molecular mechanisms distinct from those established for other Desulfovibrio sp. cytochromes from the same structural family. Conformational component in the coupled transfer of multiple electrons and protons in a monomeric tetraheme cytochrome.,Louro RO, Bento I, Matias PM, Catarino T, Baptista AM, Soares CM, Carrondo MA, Turner DL, Xavier AV J Biol Chem. 2001 Nov 23;276(47):44044-51. Epub 2001 Sep 10. PMID:11551953 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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