1k3h

NMR Solution Structure of Oxidized Cytochrome c-553 from Bacillus pasteurii

spinqualitylabelsall models 1k3h Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1k3h is a 1 chain structure with sequence from Sporosarcina pasteurii. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR, models Ligands: HEC Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CY553_SPOPA 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 solution structure of oxidized cytochrome c(553) (71 amino acid residues) from the Gram-positive bacterium Bacillus pasteurii is here reported and compared with the available crystal structure. The solution structure is obtained from 1609 meaningful NOE data (22.7 per residue), 76 dihedral angles, and 59 pseudocontact shifts. The root mean square deviations from the average structure are 0.25+/-0.07 and 0.59+/-0.13 A for the backbone and all heavy atoms, respectively, and the quality assessment of the structure is satisfactory. The solution structure closely reproduces the fold observed in the crystal structure. The backbone mobility was then investigated through amide (15)N relaxation rate and (15)N-(1)H NOE measurements. The protein is rigid in both the sub-nanosecond and millisecond time scales, probably due to the relatively large heme:number of amino acids ratio. Modeling of eight c-type cytochromes from other Gram-positive bacteria with a high sequence identity (>30 %) to the present cytochrome c(553) was performed. Analysis of consensus features accounts for the relatively low reduction potential as being due to extensive heme hydration and indicates residues 34-35, 44-46, 69-72, and 75 as a conserved hydrophobic patch for the interaction with a protein partner. At variance with mitochondrial c-type cytochrome, this protein does not experience pH-dependent coordination equilibria. The reasons for this difference are analyzed. NMR solution structure, backbone mobility, and homology modeling of c-type cytochromes from gram-positive bacteria.,Banci L, Bertini I, Ciurli S, Dikiy A, Dittmer J, Rosato A, Sciara G, Thompsett AR Chembiochem. 2002 Apr 2;3(4):299-310. PMID:11933230 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cytochrome C 3D structures

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