2rcr
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(New page: 200px<br /><applet load="2rcr" size="450" color="white" frame="true" align="right" spinBox="true" caption="2rcr, resolution 3.1Å" /> '''STRUCTURE OF THE MEMB...)
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Revision as of 11:49, 21 November 2007
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STRUCTURE OF THE MEMBRANE-BOUND PROTEIN PHOTOSYNTHETIC REACTION CENTER FROM RHODOBACTER SPHAEROIDES
Overview
The structure of the photosynthetic reaction center (RC) from Rhodobacter, sphaeroides was determined at 3.1-A resolution by the molecular, replacement method, using the Rhodopseudomonas viridis RC as the search, structure. Atomic coordinates were refined with the difference Fourier, method and restrained least-squares refinement techniques to a current R, factor of 22%. The tertiary structure of the RC complex is stabilized by, hydrophobic interactions between the L and M chains, by interactions of, the pigments with each other and with the L and M chains, by residues from, the L and M chains that coordinate to the Fe2+, by salt bridges that are, formed between the L and M chains and the H chain, and possibly by, electrostatic forces between the ends of helices. The conserved residues, at the N-termini of the L and M chains were identified as recognition, sites for the H chain.
About this Structure
2RCR is a Protein complex structure of sequences from Rhodobacter sphaeroides with FE, BCL, BPH and UQ as ligands. Full crystallographic information is available from OCA.
Reference
Structure of the membrane-bound protein photosynthetic reaction center from Rhodobacter sphaeroides., Chang CH, el-Kabbani O, Tiede D, Norris J, Schiffer M, Biochemistry. 1991 Jun 4;30(22):5352-60. PMID:2036404
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