1lia

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{{STRUCTURE_1lia| PDB=1lia | SCENE= }}
{{STRUCTURE_1lia| PDB=1lia | SCENE= }}
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'''CRYSTAL STRUCTURE OF R-PHYCOERYTHRIN FROM POLYSIPHONIA AT 2.8 A RESOLUTION'''
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===CRYSTAL STRUCTURE OF R-PHYCOERYTHRIN FROM POLYSIPHONIA AT 2.8 A RESOLUTION===
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==Overview==
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The structure of R-phycoerythrin (R-PE) from Polysiphonia urceolata was determined at 2.8 A resolution. The crystals belong to space group R3 with unit cell dimensions of a = b = 189.8 A, c = 60.1 A. The subunit composition of R-PE is (alpha 2 beta 2)3 gamma. The three-dimensional structure of R-PE was solved by the multiple isomorphous replacement method. After several cycles of model building and refinement, the crystallographic R-factor of the final model is 18.0% with data from 10.0 to 2.8 A resolution. The four phycoerythrobilin chromophores alpha 84, alpha 140a, beta 84 and beta 155 in an (alpha beta) unit are each covalently bound to a cysteine residue through ring A. The phycourobilin chromophore is bound to cysteine beta 50 by ring A and bound to cysteine beta 61 by ring D. The ring A and ring D of phycourobilin deviate from the conjugate plane formed by ring B and ring C and the four rings form a boat-shaped structure. R-PE contains a 34 kDa gamma subunit that is assumed to lie in the central channel of the molecular disc (alpha 2 beta 2)3. The energy transfer and relationship between cysteine residues and chromophores are discussed.
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(as it appears on PubMed at http://www.pubmed.gov), where 8876649 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8876649}}
==About this Structure==
==About this Structure==
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[[Category: Liang, D C.]]
[[Category: Liang, D C.]]
[[Category: Light harvesting protein]]
[[Category: Light harvesting protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 20:58:14 2008''

Revision as of 17:58, 2 July 2008

Image:1lia.png

Template:STRUCTURE 1lia

CRYSTAL STRUCTURE OF R-PHYCOERYTHRIN FROM POLYSIPHONIA AT 2.8 A RESOLUTION

Template:ABSTRACT PUBMED 8876649

About this Structure

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

Reference

Crystal structure of R-phycoerythrin from Polysiphonia urceolata at 2.8 A resolution., Chang WR, Jiang T, Wan ZL, Zhang JP, Yang ZX, Liang DC, J Mol Biol. 1996 Oct 11;262(5):721-31. PMID:8876649

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