2bv8: Difference between revisions

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[[Image:2bv8.gif|left|200px]]
{{Seed}}
[[Image:2bv8.png|left|200px]]


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{{STRUCTURE_2bv8|  PDB=2bv8  |  SCENE=  }}  
{{STRUCTURE_2bv8|  PDB=2bv8  |  SCENE=  }}  


'''THE CRYSTAL STRUCTURE OF PHYCOCYANIN FROM GRACILARIA CHILENSIS.'''
===THE CRYSTAL STRUCTURE OF PHYCOCYANIN FROM GRACILARIA CHILENSIS.===




==Overview==
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Phycocyanin is a phycobiliprotein involved in light harvesting and conduction of light to the reaction centers in cyanobacteria and red algae. The structure of C-phycocyanin from Gracilaria chilensis was solved by X-ray crystallography at 2.0 A resolution in space group P2(1). An interaction model between two PC heterohexamers was built, followed by molecular dynamic refinement. The best model showed an inter-hexamer rotation of 23 degrees . The coordinates of a PC heterohexamer (alphabeta)(6) and of the PC-PC complex were used to perform energy transfer calculations between chromophores pairs using the fluorescence resonance energy transfer approach (FRET). Two main intra PC ((I)beta(3)(82)--&gt;(I)alpha(1)(84)--&gt;(I)alpha(5)(84)--&gt;(I)beta(6)(82) and (I)beta(3)(153)--&gt;(I)beta(5)(153)) and two main inter PC ((I)beta(6)(82)--&gt;(II)beta(3)(82) and (I)beta(5)(153)--&gt;(II)beta(3)(153)) pathways were proposed based on the values of the energy transfer constants calculated for all the chromophore pairs in the hexamer and in the complex.
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{{ABSTRACT_PUBMED_17118524}}


==About this Structure==
==About this Structure==
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[[Category: Phycocyanin]]
[[Category: Phycocyanin]]
[[Category: Phycocyanobilin]]
[[Category: Phycocyanobilin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 11:12:29 2008''

Revision as of 08:12, 28 July 2008

File:2bv8.png

Template:STRUCTURE 2bv8

THE CRYSTAL STRUCTURE OF PHYCOCYANIN FROM GRACILARIA CHILENSIS.

Template:ABSTRACT PUBMED 17118524

About this Structure

2BV8 is a Protein complex structure of sequences from Gracilaria chilensis. Full crystallographic information is available from OCA.

Reference

The structure at 2 A resolution of Phycocyanin from Gracilaria chilensis and the energy transfer network in a PC-PC complex., Contreras-Martel C, Matamala A, Bruna C, Poo-Caamano G, Almonacid D, Figueroa M, Martinez-Oyanedel J, Bunster M, Biophys Chem. 2007 Feb;125(2-3):388-96. Epub 2006 Nov 10. PMID:17118524

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