ID   PYC1_ARTPT              Reviewed;          67 AA.
AC   P72506;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   25-OCT-2002, sequence version 2.
DT   25-MAY-2022, entry version 68.
DE   RecName: Full=Phycobilisome 7.8 kDa linker polypeptide, allophycocyanin-associated, core;
DE   AltName: Full=LC 7.8;
GN   Name=apcC;
OS   Arthrospira platensis (Spirulina platensis).
OC   Bacteria; Cyanobacteria; Oscillatoriophycideae; Oscillatoriales;
OC   Microcoleaceae; Arthrospira.
OX   NCBI_TaxID=118562;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=Italy;
RA   Meesapyodsuk D., Chetkul W., Nomsasawai P., Anjard C., Tanticharoen M.,
RA   Chevadhanarak S.;
RT   "Organization and nucleotide sequence of the a, b and c subunits of
RT   allophycocyanin genes from Spirulina platensis.";
RL   Submitted (SEP-2001) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Rod linker protein, associated with allophycocyanin. Linker
CC       polypeptides determine the state of aggregation and the location of the
CC       disk-shaped phycobiliprotein units within the phycobilisome and
CC       modulate their spectroscopic properties in order to mediate a directed
CC       and optimal energy transfer (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250};
CC       Peripheral membrane protein {ECO:0000250}; Cytoplasmic side
CC       {ECO:0000250}. Note=This protein occurs in the rod, it is associated
CC       with allophycocyanin. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000305}.
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DR   EMBL; X95898; CAA65143.2; -; Genomic_DNA.
DR   AlphaFoldDB; P72506; -.
DR   SMR; P72506; -.
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; 3.30.1490.170; -; 1.
DR   InterPro; IPR011134; Allophyco_linker.
DR   InterPro; IPR011064; Allophyco_linker_chain.
DR   InterPro; IPR008213; CpcD-like_dom.
DR   Pfam; PF01383; CpcD; 1.
DR   PIRSF; PIRSF000083; Allophyco_linker; 1.
DR   SMART; SM01094; CpcD; 1.
DR   SUPFAM; SSF54580; SSF54580; 1.
DR   PROSITE; PS51441; CPCD_LIKE; 1.
PE   3: Inferred from homology;
KW   Antenna complex; Membrane; Photosynthesis; Phycobilisome; Thylakoid.
FT   CHAIN           1..67
FT                   /note="Phycobilisome 7.8 kDa linker polypeptide,
FT                   allophycocyanin-associated, core"
FT                   /id="PRO_0000199237"
FT   DOMAIN          1..56
FT                   /note="CpcD-like"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00771"
SQ   SEQUENCE   67 AA;  7775 MW;  46C82C80820A7964 CRC64;
     MRVFKVTACV PSQTRIRTQR ELQNTYFTKL VPYDNWFREQ QRIMKMGGKI VKVELATGKP
     GTNTGLL