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1f99

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[[Image:1f99.gif|left|200px]]
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{{Structure
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|PDB= 1f99 |SIZE=350|CAPTION= <scene name='initialview01'>1f99</scene>, resolution 2.4&Aring;
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|LIGAND= <scene name='pdbligand=BLA:BILIVERDINE+IX+ALPHA'>BLA</scene>, <scene name='pdbligand=CYC:PHYCOCYANOBILIN'>CYC</scene>, <scene name='pdbligand=PEB:PHYCOERYTHROBILIN'>PEB</scene>
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{{STRUCTURE_1f99| PDB=1f99 | SCENE= }}
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1f99 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1f99 OCA], [http://www.ebi.ac.uk/pdbsum/1f99 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1f99 RCSB]</span>
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'''CRYSTAL STRUCTURE OF R-PHYCOCYANIN FROM POLYSIPHONIA AT 2.4 A RESOLUTION'''
'''CRYSTAL STRUCTURE OF R-PHYCOCYANIN FROM POLYSIPHONIA AT 2.4 A RESOLUTION'''
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[[Category: Jiang, T.]]
[[Category: Jiang, T.]]
[[Category: Liang, D C.]]
[[Category: Liang, D C.]]
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[[Category: electron trasnport]]
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[[Category: Electron trasnport]]
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[[Category: light harvesting protein]]
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[[Category: Light harvesting protein]]
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[[Category: photosynthesis]]
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[[Category: Photosynthesis]]
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[[Category: r-phycocyanin]]
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[[Category: R-phycocyanin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:03:32 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:18:23 2008''
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Revision as of 13:03, 2 May 2008

Image:1f99.gif

Template:STRUCTURE 1f99

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


Overview

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.

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 Page seeded by OCA on Fri May 2 16:03:32 2008

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