1ha7
From Proteopedia
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'''STRUCTURE OF A LIGHT-HARVESTING PHYCOBILIPROTEIN, C-PHYCOCYANIN FROM SPIRULINA PLATENSIS AT 2.2A RESOLUTION''' | '''STRUCTURE OF A LIGHT-HARVESTING PHYCOBILIPROTEIN, C-PHYCOCYANIN FROM SPIRULINA PLATENSIS AT 2.2A RESOLUTION''' | ||
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[[Category: Rajashankar, K R.]] | [[Category: Rajashankar, K R.]] | ||
[[Category: Ramakumar, S.]] | [[Category: Ramakumar, S.]] | ||
| - | [[Category: | + | [[Category: Chromophore]] |
| - | [[Category: | + | [[Category: Cyanobacteria]] |
| - | [[Category: | + | [[Category: Light-harvesting protein]] |
| - | [[Category: | + | [[Category: Photosynthesis]] |
| - | [[Category: | + | [[Category: Phycocyanobilin]] |
| - | [[Category: | + | [[Category: Pigment protein]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 18:37:42 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 15:37, 2 May 2008
STRUCTURE OF A LIGHT-HARVESTING PHYCOBILIPROTEIN, C-PHYCOCYANIN FROM SPIRULINA PLATENSIS AT 2.2A RESOLUTION
Overview
The crystal structure of C-phycocyanin, a light-harvesting phycobiliprotein from cyanobacteria (blue-green algae) Spirulina platensis has been solved by molecular replacement technique. The crystals belong to space group P2(1) with cell parameters a = 107.20, b = 115.40, c = 183.04 A; beta = 90.2 degrees. The structure has been refined to a crystallographic R factor of 19.2% (R(free) = 23.9%) using the X-ray diffraction data extending up to 2.2 A resolution. The asymmetric unit of the crystal cell consists of two (alphabeta)6-hexamers, each hexamer being the functional unit in the native antenna rod of cyanobacteria. The molecular structure resembles that of other reported C-phycocyanins. However, the unique form of aggregation of two (alphabeta)6-hexamers in the crystal asymmetric unit, suggests additional pathways of energy transfer in lateral direction between the adjacent hexamers involving beta155 phycocyanobilin chromophores.
About this Structure
1HA7 is a Protein complex structure of sequences from Arthrospira platensis. Full crystallographic information is available from OCA.
Reference
Crystal structure of a light-harvesting protein C-phycocyanin from Spirulina platensis., Padyana AK, Bhat VB, Madyastha KM, Rajashankar KR, Ramakumar S, Biochem Biophys Res Commun. 2001 Apr 13;282(4):893-8. PMID:11352634 Page seeded by OCA on Fri May 2 18:37:42 2008
