ID   PHEA_MICDP              Reviewed;         164 AA.
AC   P05098;
DT   13-AUG-1987, integrated into UniProtKB/Swiss-Prot.
DT   13-AUG-1987, sequence version 1.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=C-phycoerythrin alpha chain;
GN   Name=cpeA;
OS   Microchaete diplosiphon (Fremyella diplosiphon).
OC   Bacteria; Cyanobacteria; Nostocales; Rivulariaceae; Microchaete.
OX   NCBI_TaxID=1197;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2431391; DOI=10.1093/nar/14.21.8279;
RA   Mazel D., Guglielmi G., Houmard J., Sidler W., Bryant D.A.,
RA   Tandeau de Marsac N.;
RT   "Green light induces transcription of the phycoerythrin operon in the
RT   cyanobacterium Calothrix 7601.";
RL   Nucleic Acids Res. 14:8279-8290(1986).
RN   [2]
RP   PROTEIN SEQUENCE, AND CHROMOPHORE BINDING AT CYS-82 AND CYS-139.
RX   PubMed=3092842; DOI=10.1515/bchm3.1986.367.2.627;
RA   Sidler W., Kumpf B., Ruediger W., Zuber H.;
RT   "The complete amino-acid sequence of C-phycoerythrin from the
RT   cyanobacterium Fremyella diplosiphon.";
RL   Biol. Chem. Hoppe-Seyler 367:627-642(1986).
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; Peripheral membrane
CC       protein; Cytoplasmic side. Note=Forms the periphery of the
CC       phycobilisome rod.
CC   -!- INDUCTION: By green light but not by red light.
CC   -!- PTM: Contains two covalently linked bilin chromophores.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; X04592; CAA28261.1; -; Genomic_DNA.
DR   AlphaFoldDB; P05098; -.
DR   SMR; P05098; -.
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; Direct protein sequencing;
KW   Electron transport; Membrane; Photosynthesis; Phycobilisome; Thylakoid;
KW   Transport.
FT   CHAIN           1..164
FT                   /note="C-phycoerythrin alpha chain"
FT                   /id="PRO_0000199173"
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   BINDING         139
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="2"
FT                   /note="covalent, via 1 link"
SQ   SEQUENCE   164 AA;  17626 MW;  80C0F3F5010DB9C1 CRC64;
     MKSVVTTVIA AADAAGRFPS TSDLESVQGS IQRAAARLEA AEKLANNIDA VATEAYNACI
     KKYPYLNNSG EANSTDTFKA KCARDIKHYL RLIQYSLVVG GTGPLDEWGI AGQREVYRAL
     GLPTAPYVEA LSFARNRGCA PRDMSAQALT EYNALLDYAI NSLS