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Protein

B-phycoerythrin beta chain

Gene

cpeB

Organism
Rhodomonas sp. (strain CS 24) (Chroomonas sp. (strain CS24))
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

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

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Binding sitei28 – 281Phycoerythrobilin chromophore 32 Publications
Binding sitei35 – 351Phycoerythrobilin chromophore 32 Publications
Binding sitei39 – 391Phycoerythrobilin chromophore 32 Publications
Binding sitei50 – 501Phycoerythrobilin chromophore 1 (covalent; via 2 links)2 Publications
Binding sitei54 – 541Phycoerythrobilin chromophore 12 Publications
Binding sitei61 – 611Phycoerythrobilin chromophore 1 (covalent; via 2 links)2 Publications
Binding sitei72 – 721Phycoerythrobilin chromophore 22 Publications
Binding sitei82 – 821Phycoerythrobilin chromophore 2 (covalent; via 1 link)2 Publications
Binding sitei129 – 1291Phycoerythrobilin chromophore 12 Publications
Binding sitei158 – 1581Phycoerythrobilin chromophore 3 (covalent; via 1 link)2 Publications

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

Bile pigment, Chromophore

Names & Taxonomyi

Protein namesi
Recommended name:
B-phycoerythrin beta chain
Gene namesi
Name:cpeB
Encoded oniPlastid; Chloroplast
OrganismiRhodomonas sp. (strain CS 24) (Chroomonas sp. (strain CS24))
Taxonomic identifieri79257 [NCBI]
Taxonomic lineageiEukaryotaCryptophytaPyrenomonadalesPyrenomonadaceaeRhodomonas

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Chloroplast, Membrane, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 177177B-phycoerythrin beta chainPRO_0000199200Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei72 – 721N4-methylasparagine2 Publications

Post-translational modificationi

Contains three covalently linked phycoerythrobilin chromophores.

Keywords - PTMi

Methylation

Interactioni

Subunit structurei

Heterotetramer of 2 different alpha chains and 2 identical beta chains. The subunit composition could comprise any combination of 2 out of 4 different alpha units with an invariant beta unit.2 Publications

Structurei

Secondary structure

1
177
Legend: HelixTurnBeta strand
Show more details
Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Helixi4 – 96Combined sources
Beta strandi17 – 204Combined sources
Helixi22 – 309Combined sources
Helixi34 – 4512Combined sources
Helixi48 – 6215Combined sources
Helixi64 – 674Combined sources
Helixi76 – 9924Combined sources
Helixi103 – 1086Combined sources
Turni109 – 1124Combined sources
Helixi113 – 1208Combined sources
Helixi124 – 14219Combined sources
Beta strandi146 – 1483Combined sources
Helixi159 – 17618Combined sources

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1QGWX-ray1.63C/D1-177[»]
1XF6X-ray1.10C/D1-177[»]
1XG0X-ray0.97C/D1-177[»]
ProteinModelPortaliP27198.
SMRiP27198. Positions 1-177.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP27198.

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni77 – 782Phycoerythrobilin chromophore 2 binding
Regioni82 – 821Phycoerythrobilin chromophore 2 binding
Regioni147 – 1482Phycoerythrobilin chromophore 1 binding
Regioni154 – 1585Phycoerythrobilin chromophore 3 binding

Sequence similaritiesi

Belongs to the phycobiliprotein family.Curated

Family and domain databases

Gene3Di1.10.490.20. 1 hit.
InterProiIPR009050. Globin-like.
IPR012128. Phycobilisome_asu/bsu.
[Graphical view]
PfamiPF00502. Phycobilisome. 1 hit.
[Graphical view]
PIRSFiPIRSF000081. Phycocyanin. 1 hit.
SUPFAMiSSF46458. SSF46458. 1 hit.

Sequencei

Sequence statusi: Complete.

P27198-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MLDAFSRVVT NADSKAAYVG GADLQALKKF ISEGNKRLDS VNSIVSNASC
60 70 80 90 100
IVSDAVSGMI CENPSLISPS GNCYTNRRMA ACLRDGEIIL RYVSYALLSG
110 120 130 140 150
DASVLEDRCL NGLKETYSSL GVPANSNARA VSIMKACAVA FVNNTASQKK
160 170
LSTPQGDCSG LASEVGGYFD KVTAAIS
Length:177
Mass (Da):18,508
Last modified:July 25, 2006 - v2
Checksum:i51008EFCF1D7C717
GO

Experimental Info

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Sequence conflicti50 – 501C → V AA sequence (PubMed:1554738).Curated
Sequence conflicti56 – 561V → Y AA sequence (PubMed:1554738).Curated
Sequence conflicti61 – 611C → E AA sequence (PubMed:1554738).Curated
Sequence conflicti65 – 651S → H AA sequence (PubMed:1554738).Curated
Sequence conflicti73 – 731C → E AA sequence (PubMed:1554738).Curated

Cross-referencesi

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
EntryMethodResolution (Å)ChainPositionsPDBsum
1QGWX-ray1.63C/D1-177[»]
1XF6X-ray1.10C/D1-177[»]
1XG0X-ray0.97C/D1-177[»]
ProteinModelPortaliP27198.
SMRiP27198. Positions 1-177.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Miscellaneous databases

EvolutionaryTraceiP27198.

Family and domain databases

Gene3Di1.10.490.20. 1 hit.
InterProiIPR009050. Globin-like.
IPR012128. Phycobilisome_asu/bsu.
[Graphical view]
PfamiPF00502. Phycobilisome. 1 hit.
[Graphical view]
PIRSFiPIRSF000081. Phycocyanin. 1 hit.
SUPFAMiSSF46458. SSF46458. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiPHEB_RHDS2
AccessioniPrimary (citable) accession number: P27198
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 1, 1992
Last sequence update: July 25, 2006
Last modified: December 9, 2015
This is version 89 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Miscellaneous

The light-harvesting system in Cryptophytes contains phycobiliprotein complexes. Unusually they are composed of either phycoerythrin (CPE) or phycocyanin (CPC) but never allophycocyanin (APC), with only one type of biliprotein being present in any one species. Unlike cyanobacteria or red algae these proteins are not arranged into higher-order phycobilisome complexes, and they are found in the thylakoid lumen.

Keywords - Technical termi

3D-structure, Direct protein sequencing

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.