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Protein

B-phycoerythrin alpha chain

Gene

cpeA

Organism
Porphyridium purpureum (Red alga) (Porphyridium cruentum)
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 sitei82Phycoerythrobilin chromophore 1 (covalent; via 1 link)1
Binding sitei139Phycoerythrobilin chromophore 2 (covalent; via 1 link)1

GO - Biological processi

Keywordsi

Biological processElectron transport, Photosynthesis, Transport
LigandBile pigment, Chromophore

Names & Taxonomyi

Protein namesi
Recommended name:
B-phycoerythrin alpha chain
Gene namesi
Name:cpeA
Encoded oniPlastid; Chloroplast
OrganismiPorphyridium purpureum (Red alga) (Porphyridium cruentum)
Taxonomic identifieri35688 [NCBI]
Taxonomic lineageiEukaryotaRhodophytaBangiophyceaePorphyridialesPorphyridiaceaePorphyridium

Subcellular locationi

GO - Cellular componenti

Keywords - Cellular componenti

Chloroplast, Membrane, Phycobilisome, Plastid, Thylakoid

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001991761 – 164B-phycoerythrin alpha chainAdd BLAST164

Post-translational modificationi

Contains two covalently linked bilin chromophores.

Interactioni

Subunit structurei

Heteropolymer of 6 alpha, 6 beta and one gamma chain.By similarity

Protein-protein interaction databases

IntActiP11392, 1 interactor
MINTiP11392

Structurei

Secondary structure

1164
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details
Feature keyPosition(s)DescriptionActionsGraphical viewLength
Helixi4 – 15Combined sources12
Helixi21 – 62Combined sources42
Helixi64 – 67Combined sources4
Helixi76 – 99Combined sources24
Helixi103 – 108Combined sources6
Turni109 – 112Combined sources4
Helixi113 – 119Combined sources7
Helixi124 – 137Combined sources14
Turni140 – 143Combined sources4
Helixi146 – 162Combined sources17

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
3V57X-ray1.70A/C1-164[»]
3V58X-ray1.85A/C1-164[»]
ProteinModelPortaliP11392
SMRiP11392
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the phycobiliprotein family.Curated

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
PfamiView protein in Pfam
PF00502 Phycobilisome, 1 hit
PIRSFiPIRSF000081 Phycocyanin, 1 hit
SUPFAMiSSF46458 SSF46458, 1 hit

Sequencei

Sequence statusi: Complete.

P11392-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKSVITTVVS AADAAGRFPS NSDLESIQGN IQRSAARLEA AEKLAGNHEA
60 70 80 90 100
VVKEAGDACF AKYAYLKNPG EAGENQEKIN KCYRDVDHYM RLVNYDLVVG
110 120 130 140 150
GTGPLDEWGI AGAREVYRTL NLPTSAYVAS IAYTRDRLCV PRDMSAQAGV
160
EFSAYLDYLI NALS
Length:164
Mass (Da):17,817
Last modified:July 1, 1989 - v1
Checksum:iA704CE21D52B8D7E
GO

Sequence databases

PIRiS02817

Similar proteinsi

Entry informationi

Entry nameiPHEA_PORPP
AccessioniPrimary (citable) accession number: P11392
Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 1, 1989
Last sequence update: July 1, 1989
Last modified: April 25, 2018
This is version 86 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Keywords - Technical termi

3D-structure, Direct protein sequencing
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Main funding by: National Institutes of Health