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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)DescriptionActionsGraphical viewLength
Binding sitei28Phycoerythrobilin chromophore 32 Publications1
Binding sitei35Phycoerythrobilin chromophore 32 Publications1
Binding sitei39Phycoerythrobilin chromophore 32 Publications1
Binding sitei50Phycoerythrobilin chromophore 1 (covalent; via 2 links)2 Publications1
Binding sitei54Phycoerythrobilin chromophore 12 Publications1
Binding sitei61Phycoerythrobilin chromophore 1 (covalent; via 2 links)2 Publications1
Binding sitei72Phycoerythrobilin chromophore 22 Publications1
Binding sitei82Phycoerythrobilin chromophore 2 (covalent; via 1 link)2 Publications1
Binding sitei129Phycoerythrobilin chromophore 12 Publications1
Binding sitei158Phycoerythrobilin chromophore 3 (covalent; via 1 link)2 Publications1

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)DescriptionActionsGraphical viewLength
ChainiPRO_00001992001 – 177B-phycoerythrin beta chainAdd BLAST177

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei72N4-methylasparagine2 Publications1

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

1177
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi4 – 9Combined sources6
Beta strandi17 – 20Combined sources4
Helixi22 – 30Combined sources9
Helixi34 – 45Combined sources12
Helixi48 – 62Combined sources15
Helixi64 – 67Combined sources4
Helixi76 – 99Combined sources24
Helixi103 – 108Combined sources6
Turni109 – 112Combined sources4
Helixi113 – 120Combined sources8
Helixi124 – 142Combined sources19
Beta strandi146 – 148Combined sources3
Helixi159 – 176Combined sources18

3D structure databases

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

Miscellaneous databases

EvolutionaryTraceiP27198.

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni77 – 78Phycoerythrobilin chromophore 2 binding2
Regioni82Phycoerythrobilin chromophore 2 binding1
Regioni147 – 148Phycoerythrobilin chromophore 1 binding2
Regioni154 – 158Phycoerythrobilin chromophore 3 binding5

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)DescriptionActionsGraphical viewLength
Sequence conflicti50C → V AA sequence (PubMed:1554738).Curated1
Sequence conflicti56V → Y AA sequence (PubMed:1554738).Curated1
Sequence conflicti61C → E AA sequence (PubMed:1554738).Curated1
Sequence conflicti65S → H AA sequence (PubMed:1554738).Curated1
Sequence conflicti73C → E AA sequence (PubMed:1554738).Curated1

Cross-referencesi

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1QGWX-ray1.63C/D1-177[»]
1XF6X-ray1.10C/D1-177[»]
1XG0X-ray0.97C/D1-177[»]
ProteinModelPortaliP27198.
SMRiP27198.
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: November 2, 2016
This is version 91 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.