1yst

STRUCTURE OF THE PHOTOCHEMICAL REACTION CENTER OF A SPHEROIDENE CONTAINING PURPLE BACTERIUM, RHODOBACTER SPHAEROIDES Y, AT 3 ANGSTROMS RESOLUTION

spinqualitylabelsall models 1yst, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1yst is a 3 chain structure with sequence from Cereibacter sphaeroides. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3Å Ligands: BPH, MN, SPO, U10 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RCEL_CERSP The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. 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 the photochemical reaction centre from Rhodobacter sphaeroides Y, a carotenoid-containing wild-type purple bacterium, has been determined at 3 A resolution. This membrane complex consists of three subunits (281, 307 and 260 residues, respectively) and ten cofactors. It was crystallized in presence of beta-D-octylglucoside. The crystals are orthorhombic with unit-cell dimensions, a = 143.7, b = 139.8, c = 78.7 A, space group P2(1)2(1)2(1) with four molecules in the unit cell. Refinement of the structure by X-PLOR and manual reconstructions yielded an R value of 22.1% for 19630 reflections between 7 and 3 A. The secondary structure is highly homologous to those determined for Rhodopseudomonas viridis (Protein Data Bank entry 1PRC) and Rhodobacter sphaeroides R26 (Protein Data Bank entry 4RCR) reaction centres. In the latter two structures one Fe(2+) ion located between the two quinones is coordinated by four histidines and one glutamic acid. In the Rhodobacter sphaeroides Y structure, Mn(2+) occupies the same position with identical ligands and geometry. The carotenoid conformation which is a non-planar 15-15'-cis spheroidene molecule in our structure differs from the 13-14-cis 2,4-dihydroneusporene in the Rhodopseudomonas viridis structure. Structure of the photochemical reaction centre of a spheroidene-containing purple-bacterium, Rhodobacter sphaeroides Y, at 3 A resolution.,Arnoux B, Gaucher JF, Ducruix A, Reiss-Husson F Acta Crystallogr D Biol Crystallogr. 1995 May 1;51(Pt 3):368-79. PMID:15299304 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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