1f99: Difference between revisions

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[[Image:1f99.gif|left|200px]]
{{Seed}}
[[Image:1f99.png|left|200px]]


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{{STRUCTURE_1f99|  PDB=1f99  |  SCENE=  }}  
{{STRUCTURE_1f99|  PDB=1f99  |  SCENE=  }}  


'''CRYSTAL STRUCTURE OF R-PHYCOCYANIN FROM POLYSIPHONIA AT 2.4 A RESOLUTION'''
===CRYSTAL STRUCTURE OF R-PHYCOCYANIN FROM POLYSIPHONIA AT 2.4 A RESOLUTION===




==Overview==
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The crystal structure of R-phycocyanin from Polysiphonia urceolata (R-PC-PU) at 2.4 A is reported. The R-PC-PU crystal belongs to space group P4(3)2(1)2 with cell parameters a = 135.1 A, c = 210.0 A, and alpha = beta = gamma = 90 degrees. The structure was determined by molecular replacement. The crystallographic R-factor of the refined model is 0.189 (R(free) = 0.239). Comparison of the microenvironment of chromophore beta 155 in R-PC-PU and in C-PC from Fremyolla diphosiphon (C-PC-FD) reveals that their spectral differences may be caused by their different alpha 28 residues. In the R-PC-PU crystal structure, two (alpha beta)(3) trimers assemble face to face to form a hexamer, and two such hexamers assemble in two novel side-to-side arrangements. Possible models for the energy transfer from phycoerythrin to phycocyanin and from phycocyanin to allophycocyanin are proposed based on several phycobiliprotein crystal structures.
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{{ABSTRACT_PUBMED_11463658}}


==About this Structure==
==About this Structure==
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[[Category: Photosynthesis]]
[[Category: Photosynthesis]]
[[Category: R-phycocyanin]]
[[Category: R-phycocyanin]]
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Revision as of 23:54, 30 June 2008

File:1f99.png

Template:STRUCTURE 1f99

CRYSTAL STRUCTURE OF R-PHYCOCYANIN FROM POLYSIPHONIA AT 2.4 A RESOLUTION

Template:ABSTRACT PUBMED 11463658

About this Structure

1F99 is a Protein complex structure of sequences from Polysiphonia urceolata. Full crystallographic information is available from OCA.

Reference

Crystal structure of R-phycocyanin and possible energy transfer pathways in the phycobilisome., Jiang T, Zhang JP, Chang WR, Liang DC, Biophys J. 2001 Aug;81(2):1171-9. PMID:11463658

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