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Protein

C-phycocyanin alpha chain

Gene

cpcA

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

Functioni

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

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei84Phycocyanobilin chromophore (covalent; via 1 link)1

GO - Biological processi

Keywordsi

Biological processElectron transport, Photosynthesis, Transport
LigandBile pigment, Chromophore

Names & Taxonomyi

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

Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Membrane, Phycobilisome, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001991271 – 162C-phycocyanin alpha chainAdd BLAST162

Post-translational modificationi

Contains one covalently linked phycocyanobilin chromophore.

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.

Structurei

Secondary structure

1162
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi4 – 14Combined sources11
Helixi21 – 46Combined sources26
Helixi48 – 62Combined sources15
Helixi65 – 68Combined sources4
Helixi78 – 101Combined sources24
Helixi105 – 110Combined sources6
Turni111 – 114Combined sources4
Helixi115 – 121Combined sources7
Helixi126 – 139Combined sources14
Helixi144 – 160Combined sources17

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1GH0X-ray2.20A/C/E/G/I/K/M/O/Q/S/U/W1-162[»]
1HA7X-ray2.20A/C/E/G/I/K/M/O/Q/S/U/W1-162[»]
2UUMX-ray3.00A/C/E/G/I/K/M/O/Q/S/U/W1-162[»]
ProteinModelPortaliP72509
SMRiP72509
ModBaseiSearch...
MobiDBiSearch...

Miscellaneous databases

EvolutionaryTraceiP72509

Family & Domainsi

Sequence similaritiesi

Belongs to the phycobiliprotein family.Curated

Phylogenomic databases

eggNOGiENOG4108SDR Bacteria
ENOG4111FZC LUCA

Family and domain databases

Gene3Di1.10.490.20, 1 hit
InterProiView protein in InterPro
IPR009050 Globin-like_sf
IPR012128 Phycobilisome_asu/bsu
IPR038719 Phycobilisome_asu/bsu_sf
IPR006246 Phycocyanin_a
PfamiView protein in Pfam
PF00502 Phycobilisome, 1 hit
PIRSFiPIRSF000081 Phycocyanin, 1 hit
SUPFAMiSSF46458 SSF46458, 1 hit
TIGRFAMsiTIGR01338 phycocy_alpha, 1 hit

Sequencei

Sequence statusi: Complete.

P72509-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKTPLTEAVS IADSQGRFLS STEIQVAFGR FRQAKAGLEA AKALTSKADS
60 70 80 90 100
LISGAAQAVY NKFPYTTQMQ GPNYAADQRG KDKCARDIGY YLRMVTYCLI
110 120 130 140 150
AGGTGPMDEY LIAGIDEINR TFELSPSWYI EALKYIKANH GLSGDAATEA
160
NSYLDYAINA LS
Length:162
Mass (Da):17,602
Last modified:June 20, 2001 - v2
Checksum:iDA87ED20CBD2C354
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti51L → R in CAA70296 (Ref. 1) Curated1
Sequence conflicti148T → G in CAA70296 (Ref. 1) Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y09074 Genomic DNA Translation: CAA70296.1

Similar proteinsi

Entry informationi

Entry nameiPHCA_ARTPT
AccessioniPrimary (citable) accession number: P72509
Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: June 20, 2001
Last modified: April 25, 2018
This is version 87 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

3D-structure
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Main funding by: National Institutes of Health