5djq | pdb_00005djq

The structure of CBB3 cytochrome oxidase.

spinqualitylabelsall models 5djq, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5djq is a 16 chain structure with sequence from Pseudomonas stutzeri and Pseudomonas stutzeri atcc 14405 = ccug 16156. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, CU, FC6, HEC, HEM, PEO, PO4 Related: 3mk7 Activity: Cytochrome-c oxidase, with EC number 1.9.3.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The heme-copper oxidases (HCOs) accomplish the key event of aerobic respiration; they couple O2 reduction and transmembrane proton pumping. To gain new insights into the still enigmatic process, we structurally characterized a C-family HCO--essential for the pathogenicity of many bacteria--that differs from the two other HCO families, A and B, that have been structurally analyzed. The x-ray structure of the C-family cbb3 oxidase from Pseudomonas stutzeri at 3.2 angstrom resolution shows an electron supply system different from families A and B. Like family-B HCOs, C HCOs have only one pathway, which conducts protons via an alternative tyrosine-histidine cross-link. Structural differences around hemes b and b3 suggest a different redox-driven proton-pumping mechanism and provide clues to explain the higher activity of family-C HCOs at low oxygen concentrations. The structure of cbb3 cytochrome oxidase provides insights into proton pumping.,Buschmann S, Warkentin E, Xie H, Langer JD, Ermler U, Michel H Science. 2010 Jul 16;329(5989):327-30. Epub 2010 Jun 24. PMID:20576851 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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