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1phn

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STRUCTURE OF PHYCOCYANIN FROM CYANIDIUM CALDARIUM AT 1.65A RESOLUTION

Structural highlights

1phn is a 2 chain structure with sequence from Cyanidium caldarium. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.65Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PHCA_GALSU Light-harvesting photosynthetic tetrapyrrole chromophore-protein from the phycobiliprotein complex.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The crystal structure of the light-harvesting protein phycocyanin from the cyanobacterium Cyanidium caldarium with novel crystal packing has been solved at 1.65-A resolution. The structure has been refined to an R value of 18.3% with excellent backbone and side-chain stereochemical parameters. In crystals of phycocyanin used in this study, the hexamers are offset rather than aligned as in other phycocyanins that have been crystallized to date. Analysis of this crystal's unique packing leads to a proposal for phycobilisome assembly in vivo and for a more prominent role for chromophore beta-155. This new role assigned to chromophore beta-155 in phycocyanin sheds light on the numerical relationships among and function of external chromophores found in phycoerythrins and phycoerythrocyanins.

Crystal structure of C-phycocyanin from Cyanidium caldarium provides a new perspective on phycobilisome assembly.,Stec B, Troxler RF, Teeter MM Biophys J. 1999 Jun;76(6):2912-21. PMID:10354419^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Stec B, Troxler RF, Teeter MM. Crystal structure of C-phycocyanin from Cyanidium caldarium provides a new perspective on phycobilisome assembly. Biophys J. 1999 Jun;76(6):2912-21. PMID:10354419