3f6r

Desulfovibrio desulfuricans (ATCC 29577) oxidized flavodoxin

spinqualitylabelsall models 3f6r, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3f6r is a 4 chain structure with sequence from "bacillus_desulfuricans"_(beijerinck_1895)_saltet_1900 "bacillus desulfuricans" (beijerinck 1895) saltet 1900. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FMN Related: 3f6s Gene: flavodoxin ("Bacillus desulfuricans" (Beijerinck 1895) Saltet 1900) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [FLAV_DESDE] Low-potential electron donor to a number of redox enzymes. 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 crystal structure of oxidized flavodoxin from Desulfovibrio desulfuricans (ATCC 29577) was determined by molecular replacement in two crystal forms, P3(1)21 and P4(3), at 2.5 and 2.0 A resolution, respectively. Structure determination in space group P3(1)21 was challenging owing to the presence of pseudo-translational symmetry and a high copy number in the asymmetric unit (8). Initial phasing attempts in space group P3(1)21 by molecular replacement using a poor search model (46% identity) and multi-wavelength anomalous dispersion were unsuccessful. It was necessary to solve the structure in a second crystal form, space group P4(3), which was characterized by almost perfect twinning, in order to obtain a suitable search model for molecular replacement. This search model with complementary approaches to molecular replacement utilizing the pseudo-translational symmetry operators determined by analysis of the native Patterson map facilitated the selection and manual placement of molecules to generate an initial solution in the P3(1)21 crystal form. During the early stages of refinement, application of the appropriate twin law, (-h, -k, l), was required to converge to reasonable R-factor values despite the fact that in the final analysis the data were untwinned and the twin law could subsequently be removed. The approaches used in structure determination and refinement may be applicable to other crystal structures characterized by these complicating factors. The refined model shows flexibility of the flavin mononucleotide coordinating loops indicated by the isolation of two loop conformations and provides a starting point for the elucidation of the mechanism used for protein-partner recognition. Pseudosymmetry, high copy number and twinning complicate the structure determination of Desulfovibrio desulfuricans (ATCC 29577) flavodoxin.,Guelker M, Stagg L, Wittung-Stafshede P, Shamoo Y Acta Crystallogr D Biol Crystallogr. 2009 Jun;65(Pt 6):523-34. Epub 2009, May 15. PMID:19465766 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Flavodoxin 3D structures

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