2rcr
From Proteopedia
(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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| - | [[Image:2rcr.jpg|left|200px]]<br /><applet load="2rcr" size=" | + | [[Image:2rcr.jpg|left|200px]]<br /><applet load="2rcr" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="2rcr, resolution 3.1Å" /> | caption="2rcr, resolution 3.1Å" /> | ||
'''STRUCTURE OF THE MEMBRANE-BOUND PROTEIN PHOTOSYNTHETIC REACTION CENTER FROM RHODOBACTER SPHAEROIDES'''<br /> | '''STRUCTURE OF THE MEMBRANE-BOUND PROTEIN PHOTOSYNTHETIC REACTION CENTER FROM RHODOBACTER SPHAEROIDES'''<br /> | ||
==Overview== | ==Overview== | ||
| - | The structure of the photosynthetic reaction center (RC) from Rhodobacter | + | 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== | ==About this Structure== | ||
| - | 2RCR is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Rhodobacter_sphaeroides Rhodobacter sphaeroides] with FE, BCL, BPH and UQ as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | + | 2RCR is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Rhodobacter_sphaeroides Rhodobacter sphaeroides] with <scene name='pdbligand=FE:'>FE</scene>, <scene name='pdbligand=BCL:'>BCL</scene>, <scene name='pdbligand=BPH:'>BPH</scene> and <scene name='pdbligand=UQ:'>UQ</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2RCR OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Rhodobacter sphaeroides]] | [[Category: Rhodobacter sphaeroides]] | ||
| - | [[Category: Chang, C | + | [[Category: Chang, C H.]] |
[[Category: Norris, J.]] | [[Category: Norris, J.]] | ||
[[Category: Schiffer, M.]] | [[Category: Schiffer, M.]] | ||
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[[Category: photosynthetic reaction center]] | [[Category: photosynthetic reaction center]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:46:17 2008'' |
Revision as of 16:46, 21 February 2008
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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 , , and 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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