ID   PYG_CYACA               Reviewed;         234 AA.
AC   O19899;
DT   01-JUN-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1998, sequence version 1.
DT   25-MAY-2022, entry version 64.
DE   RecName: Full=Phycobilisome rod-core linker polypeptide cpcG;
GN   Name=cpcG;
OS   Cyanidium caldarium (Red alga).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Cyanidiales; Cyanidiaceae; Cyanidium.
OX   NCBI_TaxID=2771;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=RK-1;
RX   PubMed=11040290; DOI=10.1007/s002390010101;
RA   Gloeckner G., Rosenthal A., Valentin K.-U.;
RT   "The structure and gene repertoire of an ancient red algal plastid
RT   genome.";
RL   J. Mol. Evol. 51:382-390(2000).
CC   -!- FUNCTION: Rod-core linker protein required for attachment of
CC       phycocyanin to allophycocyanin in cores of phycobilisomes.
CC       {ECO:0000250}.
CC   -!- FUNCTION: Linker polypeptides determine the state of aggregation and
CC       the location of the disk-shaped phycobiliprotein units within the
CC       phycobilisome and modulate their spectroscopic properties in order to
CC       mediate a directed and optimal energy transfer. {ECO:0000250}.
CC   -!- SUBUNIT: The phycobilisome is a hemidiscoidal structure that is
CC       composed of two distinct substructures: a core complex and a number of
CC       rods radiating from the core. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Peripheral membrane protein {ECO:0000250}; Stromal side
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000255|PROSITE-ProRule:PRU00775}.
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DR   EMBL; AF022186; AAB82690.1; -; Genomic_DNA.
DR   PIR; T11967; T11967.
DR   RefSeq; NP_045071.1; NC_001840.1.
DR   AlphaFoldDB; O19899; -.
DR   SMR; O19899; -.
DR   GeneID; 800296; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0030089; C:phycobilisome; IEA:UniProtKB-KW.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.3130.20; -; 1.
DR   InterPro; IPR001297; PBS_linker_dom.
DR   InterPro; IPR038255; PBS_linker_sf.
DR   InterPro; IPR016470; Phycobilisome.
DR   Pfam; PF00427; PBS_linker_poly; 1.
DR   PIRSF; PIRSF005898; Phycobilisome_CpeC/CpcI; 1.
DR   PROSITE; PS51445; PBS_LINKER; 1.
PE   3: Inferred from homology;
KW   Antenna complex; Chloroplast; Membrane; Photosynthesis; Phycobilisome;
KW   Plastid; Thylakoid.
FT   CHAIN           1..234
FT                   /note="Phycobilisome rod-core linker polypeptide cpcG"
FT                   /id="PRO_0000199248"
FT   DOMAIN          11..191
FT                   /note="PBS-linker"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
SQ   SEQUENCE   234 AA;  27932 MW;  3FEB4258D960DB38 CRC64;
     MAIPLLYYPY SSQNHRVNSF EIKGNDEQPR IFSTDSLPTS SEMDEIIWAA YRQIFSEHQI
     LKFNRDTYLE SQLRFNQITV REFIRGLLLS ERFRILNYDV NNNYRFSEMC VQRVLGRDIY
     NDKEKIAWSI VLCTRGIKAF VDSLVNSKEY EENFGDNTVP YQKRRVIFQR SKGEVPFNLK
     TPRYGSDFKE RLGMPQYAWQ GAIRTFRPQE IKPRPGDPVL YLDMSRELLF SRFR