1qgw Summary

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CRYSTAL STRUCTURE OF PHYCOERYTHRIN 545 FROM THE MARINE CRYPTOPHYTE RHODOMONAS CS24

The structure was published by Wilk, K.E., Harrop, S.J., Jankova, L., et al., Sharples, F., Hiller, R.G., and Curmi, P.M., in 1999 in a paper entitled "Evolution of a light-harvesting protein by addition of new subunits and rearrangement of conserved elements: crystal structure of a cryptophyte phycoerythrin at 1.63-A resolution." (abstract).

This crystal structure was determined using X-ray diffraction at a resolution of 1.63 Å and deposited in 1999.

The experimental data on which the structure is based was not deposited.

This PDB entry contains a complex of 3 biomacromolecules, namely PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (ALPHA-1 CHAIN)), PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (ALPHA-2 CHAIN)), and PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (BETA CHAIN)).

It also contains one or more heterogenic compounds (e.g., ligands, co-factors, ions, modified amino acids, etc.); see here for a complete list.

The molecule most likely forms heterotetramers.

The following tables show cross-reference information to other databases (to obtain a list of all PDB entries sharing the same property or classification, click on the magnifying glass icon):


Chain Name UniProt Name of source organism % of UniProt sequence present in the sample Residues in the sample molecules % of residues observed
A PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (ALPHA-1 CHAIN)) Q00433 (53-128) (PHE3_RHDS2)search Rhodomonas sp. CS24search < 90% 76 100%
B PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (ALPHA-2 CHAIN)) P30943 (38-104) (PHE2_RHDS2)search Rhodomonas sp. CS24search < 90% 67 100%
C PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (BETA CHAIN)) P27198 (1-177) (PHEB_RHDS2)search Rhodomonas sp. CS24search 100% 177 100%
D PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (BETA CHAIN)) P27198 (1-177) (PHEB_RHDS2)search Rhodomonas sp. CS24search 100% 177 100%


This entry contains 3 unique UniProt proteins:

UniProt accession Name Organism PDB
Q00433 (53 - 128) PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (ALPHA-1 CHAIN)) Rhodomonas sp. CS24
P30943 (38 - 104) PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (ALPHA-2 CHAIN)) Rhodomonas sp. CS24
P27198 (1 - 177) PROTEIN (CRYPTOPHYTAN PHYCOERYTHRIN (BETA CHAIN)) Rhodomonas sp. CS24

Chain Structural classification (SCOP) Structural classification (CATH) Sequence family (Pfam)
A Phycoerythrin 545 alpha-subunitssearch Cryptophytan Phycoerythrin (Alpha-1 Chain); Chain Asearch Phycoerythrin, alpha/beta chainsearch
B Phycoerythrin 545 alpha-subunitssearch Cryptophytan Phycoerythrin (Alpha-1 Chain); Chain Asearch Phycoerythrin, alpha/beta chainsearch
C, D (P27198) Phycocyanin-like phycobilisome proteinssearch Phycocyaninssearch PF00502: Phycobilisome proteinsearch

Chain ID Cellular component (GO) Biological process (GO)
A (Q00433) phycobilisomesearch
B (P30943) phycobilisomesearch
C, D (P27198) phycobilisomesearch chloroplast thylakoid membranesearch membranesearch plastidsearch chloroplastsearch thylakoidsearch photosynthesissearch protein-chromophore linkagesearch oxidation-reduction processsearch

Chain InterPro annotation
A Phycoerythrin alpha chain, coresearch Globular protein, non-globular alpha/beta subunitsearch
B Phycoerythrin alpha chain, coresearch Globular protein, non-globular alpha/beta subunitsearch
C, D Globin-likesearch Phycobilisome, alpha/beta subunitsearch