ID   PHEA_NOSS1              Reviewed;         162 AA.
AC   P35796;
DT   01-JUN-1994, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-1994, sequence version 1.
DT   03-AUG-2022, entry version 118.
DE   RecName: Full=Phycoerythrocyanin alpha chain;
GN   Name=pecA; OrderedLocusNames=alr0524;
OS   Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=103690;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1556083; DOI=10.1128/jb.174.8.2640-2647.1992;
RA   Swanson R.V., de Lorimier R., Glazer A.N.;
RT   "Genes encoding the phycobilisome rod substructure are clustered on the
RT   Anabaena chromosome: characterization of the phycoerythrocyanin operon.";
RL   J. Bacteriol. 174:2640-2647(1992).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA   Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA   Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA   Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT   "Complete genomic sequence of the filamentous nitrogen-fixing
RT   cyanobacterium Anabaena sp. strain PCC 7120.";
RL   DNA Res. 8:205-213(2001).
RN   [3]
RP   CHROMOPHORE STRUCTURE, AND CHROMOPHORE BINDING AT CYS-84.
RA   Bishop J.E., Rapoport H., Klotz A.V., Chan C.F., Glazer A.N.,
RA   Fueglistaller P., Zuber H.;
RT   "Chromopeptides from phycoerythrocyanin. Structure and linkage of the three
RT   bilin groups.";
RL   J. Am. Chem. Soc. 109:875-881(1987).
CC   -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex.
CC   -!- BIOPHYSICOCHEMICAL PROPERTIES:
CC       Absorption:
CC         Abs(max)=~550 nm;
CC   -!- SUBUNIT: Heterodimer of an alpha and a beta chain. {ECO:0000250}.
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 one covalently linked bilin chromophore.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; AF178757; AAA22017.1; -; Genomic_DNA.
DR   EMBL; BA000019; BAB72482.1; -; Genomic_DNA.
DR   PIR; AC1872; AC1872.
DR   PIR; B41841; B41841.
DR   RefSeq; WP_010994700.1; NZ_RSCN01000024.1.
DR   AlphaFoldDB; P35796; -.
DR   SMR; P35796; -.
DR   STRING; 103690.17129869; -.
DR   EnsemblBacteria; BAB72482; BAB72482; BAB72482.
DR   GeneID; 58725689; -.
DR   KEGG; ana:alr0524; -.
DR   eggNOG; ENOG502Z930; Bacteria.
DR   OMA; CVRDISH; -.
DR   OrthoDB; 1328188at2; -.
DR   Proteomes; UP000002483; Chromosome.
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   1: Evidence at protein level;
KW   Antenna complex; Bile pigment; Chromophore; Electron transport; Membrane;
KW   Photosynthesis; Phycobilisome; Reference proteome; Thylakoid; Transport.
FT   CHAIN           1..162
FT                   /note="Phycoerythrocyanin alpha chain"
FT                   /id="PRO_0000199168"
FT   BINDING         84
FT                   /ligand="(15Z)-phycoviolobilin"
FT                   /ligand_id="ChEBI:CHEBI:189063"
FT                   /note="covalent, via 1 link"
SQ   SEQUENCE   162 AA;  17455 MW;  9EEDD171D4AF01D2 CRC64;
     MKTPLTEAIS AADVRGSYLS NTEMQAVFGR FNRARAGLAA AQAFSNNGKK WAEAAANHVY
     QKFPYTTQMS GPQYASTPEG KSKCVRDIDH YLRTISYCCV VGGTGPLDEY VVSGLSELNS
     ALGLSPSWYV AALEFVRDNH GLNGDVAGEA NIYLNYAINA LS