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1mps

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[[Image:1mps.gif|left|200px]]
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{{STRUCTURE_1mps| PDB=1mps | SCENE= }}
{{STRUCTURE_1mps| PDB=1mps | SCENE= }}
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'''PHOTOSYNTHETIC REACTION CENTER MUTANT WITH PHE M 197 REPLACED WITH ARG AND TYR M 177 REPLACED WITH PHE (CHAIN M, Y177F, F197R)'''
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===PHOTOSYNTHETIC REACTION CENTER MUTANT WITH PHE M 197 REPLACED WITH ARG AND TYR M 177 REPLACED WITH PHE (CHAIN M, Y177F, F197R)===
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==Overview==
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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.
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(as it appears on PubMed at http://www.pubmed.gov), where 9537989 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9537989}}
==About this Structure==
==About this Structure==
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[[Category: Photosynthetic reaction center]]
[[Category: Photosynthetic reaction center]]
[[Category: Transmembrane]]
[[Category: Transmembrane]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 01:34:14 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 00:44:45 2008''

Revision as of 21:44, 2 July 2008

Image:1mps.png

Template:STRUCTURE 1mps

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

Template:ABSTRACT PUBMED 9537989

About this Structure

1MPS is a Protein complex structure of sequences from Rhodobacter sphaeroides. Full crystallographic information is available from OCA.

Reference

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

Page seeded by OCA on Thu Jul 3 00:44:45 2008

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