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Protein

C-phycocyanin beta chain

Gene

cpcB

Organism
Arthrospira platensis (Spirulina platensis)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

Light-harvesting photosynthetic bile pigment-protein from the phycobiliprotein complex.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei82Phycocyanobilin chromophore 1 (covalent; via 1 link)1
Binding sitei153Phycocyanobilin chromophore 2 (covalent; via 1 link)1

GO - Biological processi

Complete GO annotation...

Keywords - Biological processi

Electron transport, Photosynthesis, Transport

Keywords - Ligandi

Bile pigment, Chromophore

Names & Taxonomyi

Protein namesi
Recommended name:
C-phycocyanin beta chain
Gene namesi
Name:cpcB
OrganismiArthrospira platensis (Spirulina platensis)
Taxonomic identifieri118562 [NCBI]
Taxonomic lineageiBacteriaCyanobacteriaOscillatoriophycideaeOscillatorialesMicrocoleaceaeArthrospira

Subcellular locationi

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Membrane, Phycobilisome, Thylakoid

Pathology & Biotechi

Protein family/group databases

Allergomei8833. Art pl beta_Phycocyanin.

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001991551 – 172C-phycocyanin beta chainAdd BLAST172

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei72N4-methylasparagine1 Publication1

Post-translational modificationi

Contains two covalently linked bilin chromophores.

Keywords - PTMi

Methylation

Interactioni

Subunit structurei

The alpha and beta chains exhibit high affinity for one another and form heterodimers. These heterodimers form heterohexamers of 3 alpha and 3 beta chains which, in turn, aggregate into a heterododecamer consisting of 2 heterohexamers.

Protein-protein interaction databases

STRINGi696747.NIES39_D02060.

Structurei

Secondary structure

1172
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi4 – 14Combined sources11
Helixi21 – 32Combined sources12
Helixi34 – 46Combined sources13
Helixi48 – 62Combined sources15
Helixi64 – 66Combined sources3
Helixi76 – 99Combined sources24
Helixi103 – 108Combined sources6
Turni109 – 112Combined sources4
Helixi113 – 120Combined sources8
Helixi124 – 142Combined sources19
Helixi154 – 171Combined sources18

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1GH0X-ray2.20B/D/F/H/J/L/N/P/R/T/V/X1-172[»]
1HA7X-ray2.20B/D/F/H/J/L/N/P/R/T/V/X1-172[»]
2UUMX-ray3.00B/D/F/H/J/L/N/P/R/T/V/X1-172[»]
ProteinModelPortaliP72508.
SMRiP72508.
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP72508.

Family & Domainsi

Sequence similaritiesi

Belongs to the phycobiliprotein family.Curated

Phylogenomic databases

eggNOGiENOG4105D6V. Bacteria.
ENOG410XPK8. LUCA.

Family and domain databases

Gene3Di1.10.490.20. 1 hit.
InterProiIPR009050. Globin-like.
IPR012128. Phycobilisome_asu/bsu.
IPR006247. Phycocyanin_b.
[Graphical view]
PfamiPF00502. Phycobilisome. 1 hit.
[Graphical view]
PIRSFiPIRSF000081. Phycocyanin. 1 hit.
SUPFAMiSSF46458. SSF46458. 1 hit.
TIGRFAMsiTIGR01339. phycocy_beta. 1 hit.

Sequencei

Sequence statusi: Complete.

P72508-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MFDAFTKVVS QADTRGEMLS TAQIDALSQM VAESNKRLDA VNRITSNAST
60 70 80 90 100
IVSNAARSLF AEQPQLIAPG GNAYTSRRMA ACLRDMEIIL RYVTYAVFAG
110 120 130 140 150
DASVLEDRCL NGLRETYLAL GTPGSSVAVG VGKMKEAALA IVNDPAGITP
160 170
GDCSALASEI ASYFDRACAA VS
Length:172
Mass (Da):18,094
Last modified:June 20, 2001 - v2
Checksum:i541754A562E4301C
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti76S → N in CAA70295 (Ref. 1) Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y09074 Genomic DNA. Translation: CAA70295.1.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y09074 Genomic DNA. Translation: CAA70295.1.

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1GH0X-ray2.20B/D/F/H/J/L/N/P/R/T/V/X1-172[»]
1HA7X-ray2.20B/D/F/H/J/L/N/P/R/T/V/X1-172[»]
2UUMX-ray3.00B/D/F/H/J/L/N/P/R/T/V/X1-172[»]
ProteinModelPortaliP72508.
SMRiP72508.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi696747.NIES39_D02060.

Protein family/group databases

Allergomei8833. Art pl beta_Phycocyanin.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Phylogenomic databases

eggNOGiENOG4105D6V. Bacteria.
ENOG410XPK8. LUCA.

Miscellaneous databases

EvolutionaryTraceiP72508.

Family and domain databases

Gene3Di1.10.490.20. 1 hit.
InterProiIPR009050. Globin-like.
IPR012128. Phycobilisome_asu/bsu.
IPR006247. Phycocyanin_b.
[Graphical view]
PfamiPF00502. Phycobilisome. 1 hit.
[Graphical view]
PIRSFiPIRSF000081. Phycocyanin. 1 hit.
SUPFAMiSSF46458. SSF46458. 1 hit.
TIGRFAMsiTIGR01339. phycocy_beta. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiPHCB_ARTPT
AccessioniPrimary (citable) accession number: P72508
Entry historyi
Integrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: June 20, 2001
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)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure

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.