ID   PHAA_ANACY              Reviewed;         160 AA.
AC   P07325;
DT   01-APR-1988, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1988, sequence version 1.
DT   03-AUG-2022, entry version 79.
DE   RecName: Full=Allophycocyanin alpha chain;
GN   Name=apcA;
OS   Anabaena cylindrica.
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Anabaena.
OX   NCBI_TaxID=1165;
RN   [1]
RP   PROTEIN SEQUENCE.
RA   Minami Y., Yamada F., Hase T., Matsubara H., Murakami A., Fujita Y.,
RA   Takao T., Shimonishi Y.;
RT   "Amino acid sequences of allophycocyanin alpha- and beta-subunits isolated
RT   from Anabaena cylindrica.";
RL   FEBS Lett. 191:216-220(1985).
CC   -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex. Allophycocyanin has a maximum absorption at
CC       approximately 650 nanometers.
CC   -!- SUBUNIT: Component of the phycobilisome. Heterodimer of an alpha and a
CC       beta chain.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane
CC       protein; Cytoplasmic side. Note=Forms the core of the phycobilisome.
CC   -!- PTM: Contains one covalently linked phycocyanobilin chromophore.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   PIR; A24224; AFAIAC.
DR   AlphaFoldDB; P07325; -.
DR   SMR; P07325; -.
DR   OMA; GGQLFQK; -.
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; Methylation; Photosynthesis; Phycobilisome;
KW   Thylakoid; Transport.
FT   CHAIN           1..160
FT                   /note="Allophycocyanin alpha chain"
FT                   /id="PRO_0000199069"
FT   BINDING         80
FT                   /ligand="(2R,3E)-phycocyanobilin"
FT                   /ligand_id="ChEBI:CHEBI:85275"
FT                   /note="covalent, via 1 link"
FT   MOD_RES         70
FT                   /note="N4-methylasparagine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   160 AA;  17081 MW;  537C408172597624 CRC64;
     SIVTKAIVNA DAEARYLSPG ELDRIKSFVA GGASRLRIAQ VLTENRERIV KQAGDQLFQK
     RPDVVSPGGN AYGQEMTATC LRDLDYYLRL VTYGIVSGDV TPIEEIGIVG VREMYKSLGT
     PIDAVAGGVA AMKNVAATLL SAEDSSEAGS YFDYVVGAMQ