1mps | pdb_00001mps

PHOTOSYNTHETIC REACTION CENTER MUTANT WITH PHE M 197 REPLACED WITH ARG AND TYR M 177 REPLACED WITH PHE (CHAIN M, Y177F, F197R)

spinqualitylabelsall models 1mps, resolution 2.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1mps 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 2.55Å Ligands: BCL, BPH, FE2, LDA, PO4, SPN, 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 Reaction centers have been crystallized from the antenna-deficient RCO2 strain of Rhodobacter sphaeroides, and a structural model has been constructed at 2.6 A resolution. The antenna-deficient strain allows assessment of the structural integrity of the reaction center at each stage in the purification-crystallization procedure. Spectroscopic evidence indicates that the properties of the reaction center bacteriopheophytins and the primary donor bacteriochlorophylls are modified somewhat on removal of the protein complex from the membrane and that these changes are carried through to the crystal form of the reaction center. The structure of a FM197R/YM177F mutant reaction center has also been determined to 2.55 A resolution. The mutant complex shows an unexpected change in structure, with a significant reorientation of the new arginine, the incorporation of a new water molecule into the structure, and rotation of the 2-acetyl carbonyl group of one of the primary donor bacteriochlorophylls to a more out-of-plane geometry. Changes in the optical spectrum of the FM197R/YM177F reaction center are discussed with respect to the altered structure of the complex. Structural studies of wild-type and mutant reaction centers from an antenna-deficient strain of Rhodobacter sphaeroides: monitoring the optical properties of the complex from bacterial cell to crystal.,McAuley-Hecht KE, Fyfe PK, Ridge JP, Prince SM, Hunter CN, Isaacs NW, Cogdell RJ, Jones MR Biochemistry. 1998 Apr 7;37(14):4740-50. PMID:9537989 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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