ID   PYC1_NOSS1              Reviewed;          68 AA.
AC   P80558;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   25-MAY-2022, entry version 106.
DE   RecName: Full=Phycobilisome 7.8 kDa linker polypeptide, allophycocyanin-associated, core;
DE   AltName: Full=LC 7.8;
GN   Name=apcC; OrderedLocusNames=asr0023;
OS   Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=103690;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Cai Y.A., Schwarts S.H., Glazer A.N.;
RT   "Transposon insertion in genes coding for the biosynthesis of structural
RT   components of the Anabaena sp. phycobilisome.";
RL   Photosyn. Res. 53:109-120(1997).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA   Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA   Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA   Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA   Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT   "Complete genomic sequence of the filamentous nitrogen-fixing
RT   cyanobacterium Anabaena sp. strain PCC 7120.";
RL   DNA Res. 8:205-213(2001).
RN   [3]
RP   PROTEIN SEQUENCE OF 2-62.
RX   PubMed=8665889; DOI=10.1111/j.1432-1033.1996.01010.x;
RA   Ducret A., Sidler W., Wehrli E., Frank G., Zuber H.;
RT   "Isolation, characterization and electron microscopy analysis of a
RT   hemidiscoidal phycobilisome type from the cyanobacterium Anabaena sp. PCC
RT   7120.";
RL   Eur. J. Biochem. 236:1010-1024(1996).
RN   [4]
RP   PROTEIN SEQUENCE OF 2-21, SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=24550276; DOI=10.1073/pnas.1320599111;
RA   Watanabe M., Semchonok D.A., Webber-Birungi M.T., Ehira S., Kondo K.,
RA   Narikawa R., Ohmori M., Boekema E.J., Ikeuchi M.;
RT   "Attachment of phycobilisomes in an antenna-photosystem I supercomplex of
RT   cyanobacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 111:2512-2517(2014).
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.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000269|PubMed:24550276}; Peripheral membrane protein; Cytoplasmic
CC       side. Note=This protein occurs in the rod, it is associated with
CC       allophycocyanin. {ECO:0000269|PubMed:24550276, ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000305}.
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DR   EMBL; U96137; AAC97592.1; -; Genomic_DNA.
DR   EMBL; BA000019; BAB77547.1; -; Genomic_DNA.
DR   PIR; AG1809; AG1809.
DR   RefSeq; WP_010994200.1; NZ_RSCN01000016.1.
DR   PDB; 7EYD; EM; 3.90 A; 29/39/49/G8/N8/U8/b8/i8=1-68.
DR   PDBsum; 7EYD; -.
DR   AlphaFoldDB; P80558; -.
DR   SMR; P80558; -.
DR   STRING; 103690.17135001; -.
DR   EnsemblBacteria; BAB77547; BAB77547; BAB77547.
DR   GeneID; 58725380; -.
DR   KEGG; ana:asr0023; -.
DR   eggNOG; ENOG5032S63; Bacteria.
DR   OMA; LFKITAC; -.
DR   OrthoDB; 1939400at2; -.
DR   Proteomes; UP000002483; Chromosome.
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   1: Evidence at protein level;
KW   3D-structure; Antenna complex; Direct protein sequencing; Membrane;
KW   Photosynthesis; Phycobilisome; Reference proteome; Thylakoid.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:24550276,
FT                   ECO:0000269|PubMed:8665889"
FT   CHAIN           2..68
FT                   /note="Phycobilisome 7.8 kDa linker polypeptide,
FT                   allophycocyanin-associated, core"
FT                   /id="PRO_0000199234"
FT   DOMAIN          2..57
FT                   /note="CpcD-like"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00771"
SQ   SEQUENCE   68 AA;  7840 MW;  8CE426DD87CEB731 CRC64;
     MSRLFKITAL VPSLSRTRTQ RELQNTYFTK LVPYENWFRE QQRIQKAGGK IIKVELATGK
     QGTNAGLQ