1b8d

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{{STRUCTURE_1b8d| PDB=1b8d | SCENE= }}
{{STRUCTURE_1b8d| PDB=1b8d | SCENE= }}
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'''CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN'''
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===CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN===
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==Overview==
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The structure of R-phycoerythrin (R-PE) from the red alga Griffithsia monilis was solved at 1.90-A resolution by molecular replacement, using the atomic coordinates of cyanobacterial phycocyanin from Fremyella diplosiphon as a model. The crystallographic R factor for the final model is 17.5% (Rfree 22.7%) for reflections in the range 100-1.90 A. The model consists of an (alphabeta)2 dimer with an internal noncrystallographic dyad and a fragment of the gamma-polypeptide. The alpha-polypeptide (164 amino acid residues) has two covalently bound phycoerythrobilins at positions alpha82 and alpha139. The beta-polypeptide (177 residues) has two phycoerythrobilins bound to residues beta82 and beta158 and one phycourobilin covalently attached to rings A and D at residues beta50 and beta61, respectively. The electron density of the gamma-polypeptide is mostly averaged out by threefold crystallographic symmetry, but a dipeptide (Gly-Tyr) and one single Tyr could be modeled. These two tyrosine residues of the gamma-polypeptide are in close proximity to the phycoerythrobilins at position beta82 of two symmetry-related beta-polypeptides and are related by the same noncrystallographic dyad as the (alphabeta)2 dimer. Possible energy transfer pathways are discussed briefly.
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(as it appears on PubMed at http://www.pubmed.gov), where 10388620 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10388620}}
==About this Structure==
==About this Structure==
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[[Category: Phycobiliprotein]]
[[Category: Phycobiliprotein]]
[[Category: Red algae]]
[[Category: Red algae]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 18:32:54 2008''

Revision as of 15:32, 30 June 2008

Image:1b8d.png

Template:STRUCTURE 1b8d

CRYSTAL STRUCTURE OF A PHYCOUROBILIN-CONTAINING PHYCOERYTHRIN

Template:ABSTRACT PUBMED 10388620

About this Structure

1B8D is a Protein complex structure of sequences from Griffithsia monilis. Full crystallographic information is available from OCA.

Reference

Crystal structure of a phycourobilin-containing phycoerythrin at 1.90-A resolution., Ritter S, Hiller RG, Wrench PM, Welte W, Diederichs K, J Struct Biol. 1999 Jun 15;126(2):86-97. PMID:10388620

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