1f99
From Proteopedia
Line 1: | Line 1: | ||
[[Image:1f99.gif|left|200px]] | [[Image:1f99.gif|left|200px]] | ||
- | + | <!-- | |
- | + | The line below this paragraph, containing "STRUCTURE_1f99", creates the "Structure Box" on the page. | |
- | + | You may change the PDB parameter (which sets the PDB file loaded into the applet) | |
- | + | or the SCENE parameter (which sets the initial scene displayed when the page is loaded), | |
- | + | or leave the SCENE parameter empty for the default display. | |
- | + | --> | |
- | | | + | {{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''' | ||
Line 28: | Line 25: | ||
[[Category: Jiang, T.]] | [[Category: Jiang, T.]] | ||
[[Category: Liang, D C.]] | [[Category: Liang, D C.]] | ||
- | [[Category: | + | [[Category: Electron trasnport]] |
- | [[Category: | + | [[Category: Light harvesting protein]] |
- | [[Category: | + | [[Category: Photosynthesis]] |
- | [[Category: | + | [[Category: R-phycocyanin]] |
- | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:03:32 2008'' | |
- | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + |
Revision as of 13:03, 2 May 2008
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