ID   PHEA_PSETP              Reviewed;         164 AA.
AC   P29296;
DT   01-DEC-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-1992, sequence version 1.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=C-phycoerythrin alpha chain;
GN   Name=cpeA;
OS   Pseudanabaena tenuis (strain PCC 7409).
OC   Bacteria; Cyanobacteria; Pseudanabaenales; Pseudanabaenaceae;
OC   Pseudanabaena.
OX   NCBI_TaxID=29415;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1809846; DOI=10.1111/j.1365-2958.1991.tb01867.x;
RA   Dubbs J.M., Bryant D.A.;
RT   "Molecular cloning and transcriptional analysis of the cpeBA operon of the
RT   cyanobacterium Pseudanabaena species PCC7409.";
RL   Mol. Microbiol. 5:3073-3085(1991).
CC   -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex.
CC   -!- SUBUNIT: Heterodimer of an alpha and a beta chain.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250};
CC       Peripheral membrane protein {ECO:0000250}; Cytoplasmic side
CC       {ECO:0000250}. Note=Forms the periphery of the phycobilisome rod.
CC       {ECO:0000250}.
CC   -!- PTM: Contains two covalently linked bilin chromophores. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; X63073; CAA44795.1; -; Genomic_DNA.
DR   AlphaFoldDB; P29296; -.
DR   SMR; P29296; -.
DR   TCDB; 2.A.114.1.9; the putative peptide transporter carbon starvation csta (csta) family.
DR   GO; GO:0030089; C:phycobilisome; IEA:UniProtKB-KW.
DR   GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.490.20; -; 1.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012128; Phycobilisome_asu/bsu.
DR   InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR   Pfam; PF00502; Phycobilisome; 1.
DR   PIRSF; PIRSF000081; Phycocyanin; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
PE   3: Inferred from homology;
KW   Antenna complex; Bile pigment; Chromophore; Electron transport; Membrane;
KW   Photosynthesis; Phycobilisome; Thylakoid; Transport.
FT   CHAIN           1..164
FT                   /note="C-phycoerythrin alpha chain"
FT                   /id="PRO_0000199181"
FT   BINDING         82
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="1"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000250"
FT   BINDING         139
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="2"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   164 AA;  17677 MW;  672045E4A238747E CRC64;
     MKSVVTTVIS AADAAGRFPS TSDLESVQGS IQRAAARLEA AEKLANNIDA VAKEAYNAAI
     KKYPYLNNAG EANSTDTFKA KCARDIKHYL RLIQYSLVVG GTGPLDEWGI AGQREVYRSL
     GLPTAPYVEA LSYARNRGCS PRDLSPQALT EYNALLDYAI NSLS