2cym
From Proteopedia
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EFFECTS OF AMINO ACID SUBSTITUTION ON THREE-DIMENSIONAL STRUCTURE: AN X-RAY ANALYSIS OF CYTOCHROME C3 FROM DESULFOVIBRIO VULGARIS HILDENBOROUGH AT 2 ANGSTROMS RESOLUTION
Overview
The three-dimensional structure of cytochrome c3 from Desulfovibrio, vulgaris Hildenborough has been determined by use of the molecular, replacement method and refined at 2.0 A resolution. A suitable crystal of, the cytochrome c3 was obtained from buffer solution (25 mM Tris-HCl, pH, 7.4), with 75% ethanol as the precipitating reagent. Crystallographic data, are as follows: a = 43.17 A, b = 62.91 A, c = 41.17 A, orthorhombic, P2(1)2(1)2(1) and Z = 4. Constrained least-squares refinement and a, molecular dynamics procedure with a simulated structure annealing method, yielded a crystallographic R-factor of 0.212. The similarity in the, folding pattern of both cytochromes c3 is established, the mean deviation, of the polypeptide backbone between the two structures being 0.367 A. Most, of the amino acids substitutions from DvMF were located on the surface of, the molecule, and in particular, S27 and V86 were placed near the, propionic acid of the heme group so as to hang over the heme and the cleft, of the molecule.
About this Structure
2CYM is a Single protein structure of sequence from Desulfovibrio vulgaris with HEM as ligand. Full crystallographic information is available from OCA.
Reference
Effects of amino acid substitution on three-dimensional structure: an X-ray analysis of cytochrome c3 from Desulfovibrio vulgaris Hildenborough at 2 A resolution., Morimoto Y, Tani T, Okumura H, Higuchi Y, Yasuoka N, J Biochem (Tokyo). 1991 Oct;110(4):532-40. PMID:1663945
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