title: Crystallization and preliminary X-ray crystallographic analysis of a periplasmic tetrahaem flavocytochrome c3 from Shewanella frigidimarina NCIMB400 which has fumarate reductase activity.
abstract: The fumarate reductase of Escherichia coli and other bacteria is a membrane-bound enzyme consisting of four subunits. A soluble periplasmic 64 kDa tetrahaem flavocytochrome c3 from Shewanella frigidimarina NCIMB400 which possesses a catalytic fumarate reductase activity has been crystallized. The crystals belong to space group P212121 with unit-cell parameters a = 72.4, b = 110.1, c = 230.2 A. Assuming a molecular dimer in the asymmetric unit, the crystals contain 65% solvent and, when cryocooled to 100 K, the crystals diffract to at least 3.0 A resolution. The crystals, however, display an inherent lack of isomorphism and the plausibility of a MAD phasing experiment has therefore been investigated by measuring the iron K absorption edge from a single crystal.
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D003574:Cytochrome c Group / Q000737:chemistry* / Q000378:metabolism; D006090:Gram-Negative Bacteria / Q000201:enzymology*; D011487:Protein Conformation; D013050:Spectrometry, Fluorescence; D013385:Succinate Dehydrogenase / Q000737:chemistry* / Q000378:metabolism*