ID   PYG_PORPU               Reviewed;         231 AA.
AC   P51365;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   25-MAY-2022, entry version 57.
DE   RecName: Full=Phycobilisome rod-core linker polypeptide cpcG;
GN   Name=cpcG;
OS   Porphyra purpurea (Red seaweed) (Ulva purpurea).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Porphyra.
OX   NCBI_TaxID=2787;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Avonport;
RA   Reith M.E., Munholland J.;
RT   "Complete nucleotide sequence of the Porphyra purpurea chloroplast
RT   genome.";
RL   Plant Mol. Biol. Rep. 13:333-335(1995).
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. Plastid, chloroplast
CC       thylakoid membrane {ECO:0000250}; Peripheral membrane protein
CC       {ECO:0000250}; Stromal side {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000255|PROSITE-ProRule:PRU00775}.
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DR   EMBL; U38804; AAC08251.1; -; Genomic_DNA.
DR   PIR; S73286; S73286.
DR   RefSeq; NP_053975.1; NC_000925.1.
DR   AlphaFoldDB; P51365; -.
DR   SMR; P51365; -.
DR   GeneID; 810005; -.
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   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..231
FT                   /note="Phycobilisome rod-core linker polypeptide cpcG"
FT                   /id="PRO_0000199243"
FT   DOMAIN          11..191
FT                   /note="PBS-linker"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
SQ   SEQUENCE   231 AA;  26837 MW;  56F53E9EBBB65B55 CRC64;
     MSIPLLNYSL STQNQRVDGY EVSPGEEQPR AYNTDNLPSA VEMDEVIWAA YRQIFSEHQI
     LSSTSAPYLE SQLRFNQIKV KDFIKGLILS ESFRKLNYDV NNNYRFVEIC VQRILGRDVY
     NEREKLAWSI VIASKGLESF INMLIESDEY EENFGDSIVP YQRRRIIAQR SKGEMPFNLK
     TPRYGADFKE KFGMPQFIWQ GPVRQFRPQE QRPKAGDPAL FLGMVNDLAT V