ID   PHRA_SYNPY              Reviewed;         162 AA.
AC   Q02182;
DT   01-JUL-1993, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 85.
DE   RecName: Full=R-phycocyanin-2 subunit alpha;
DE   AltName: Full=R-phycocyanin II alpha chain;
GN   Name=rpcA;
OS   Synechococcus sp. (strain WH8020).
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC   unclassified Synechococcus.
OX   NCBI_TaxID=32052;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8425055; DOI=10.1007/bf00019939;
RA   de Lorimier R., Wilbanks S.M., Glazer A.N.;
RT   "Genes of the R-phycocyanin II locus of marine Synechococcus spp., and
RT   comparison of protein-chromophore interactions in phycocyanins differing in
RT   bilin composition.";
RL   Plant Mol. Biol. 21:225-237(1993).
CC   -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex.
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=Part of the phycobilisome rod. {ECO:0000250}.
CC   -!- PTM: Contains one covalently linked bilin chromophore. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; M95288; AAA27346.1; -; Genomic_DNA.
DR   RefSeq; WP_048347952.1; NZ_CP011941.1.
DR   AlphaFoldDB; Q02182; -.
DR   SMR; Q02182; -.
DR   STRING; 32052.WB44_13625; -.
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   InterPro; IPR006246; Phycocyanin_a.
DR   Pfam; PF00502; Phycobilisome; 1.
DR   PIRSF; PIRSF000081; Phycocyanin; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   TIGRFAMs; TIGR01338; phycocy_alpha; 1.
PE   3: Inferred from homology;
KW   Antenna complex; Bile pigment; Chromophore; Electron transport; Membrane;
KW   Photosynthesis; Phycobilisome; Thylakoid; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..162
FT                   /note="R-phycocyanin-2 subunit alpha"
FT                   /id="PRO_0000199140"
FT   BINDING         84
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   162 AA;  17369 MW;  8CE2651FB17AFD99 CRC64;
     MKTPLTEAVA AADSQGRFLS NTEVQAASGR FNRAKASLEA AKGLTAKADS LVSSATQAVY
     TKFPYTTQME GPNYSATSEG KAKCSRDIGY YLRMITYCLV AGGTGPMDDY LIAGLDEINR
     TFELSPSWYV EALKHIQSNH GLSGDAATEA NSYINYAINA LT