ID   PYG4_NOSS1              Reviewed;         253 AA.
AC   P29989;
DT   01-APR-1993, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   25-MAY-2022, entry version 108.
DE   RecName: Full=Phycobilisome rod-core linker polypeptide CpcG4;
DE   AltName: Full=L-RC 29.2;
GN   Name=cpcG4 {ECO:0000303|PubMed:1743523}; OrderedLocusNames=alr0537;
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], PROTEIN SEQUENCE OF 2-23, AND SUBUNIT.
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=1743523; DOI=10.1016/0378-1119(91)90301-q;
RA   Bryant D.A., Stirewalt V.L., Glauser M., Frank G., Sidler W., Zuber H.;
RT   "A small multigene family encodes the rod-core linker polypeptides of
RT   Anabaena sp. PCC7120 phycobilisomes.";
RL   Gene 107:91-99(1991).
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 2-14, 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-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: Part of the phycobilisome, 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:0000269|PubMed:1743523,
CC       ECO:0000269|PubMed:24550276}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane
CC       {ECO:0000269|PubMed:24550276}; Peripheral membrane protein
CC       {ECO:0000250}; Cytoplasmic side {ECO:0000250}. Note=Part of a
CC       phycobilisome rod. {ECO:0000269|PubMed:24550276}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000255|PROSITE-ProRule:PRU00775}.
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DR   EMBL; M80435; AAA22039.1; -; Genomic_DNA.
DR   EMBL; BA000019; BAB72495.1; -; Genomic_DNA.
DR   PIR; AH1873; AH1873.
DR   PIR; JS0595; JS0595.
DR   RefSeq; WP_010994713.1; NZ_RSCN01000059.1.
DR   PDB; 7EYD; EM; 3.90 A; A2/A5/A6/AA=1-253.
DR   PDBsum; 7EYD; -.
DR   AlphaFoldDB; P29989; -.
DR   SMR; P29989; -.
DR   STRING; 103690.17129882; -.
DR   EnsemblBacteria; BAB72495; BAB72495; BAB72495.
DR   KEGG; ana:alr0537; -.
DR   eggNOG; COG0237; Bacteria.
DR   OMA; QIFFHAM; -.
DR   OrthoDB; 1021247at2; -.
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; 1.10.3130.20; -; 1.
DR   InterPro; IPR001297; PBS_linker_dom.
DR   InterPro; IPR038255; PBS_linker_sf.
DR   Pfam; PF00427; PBS_linker_poly; 1.
DR   PROSITE; PS51445; PBS_LINKER; 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:1743523,
FT                   ECO:0000269|PubMed:24550276"
FT   CHAIN           2..253
FT                   /note="Phycobilisome rod-core linker polypeptide CpcG4"
FT                   /id="PRO_0000199247"
FT   DOMAIN          11..191
FT                   /note="PBS-linker"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
SQ   SEQUENCE   253 AA;  29323 MW;  BE280E8CDD24B541 CRC64;
     MALPLLQYKP SSQNHRVTSF GAADQNEDTP YIYRIEDVSS YTDIQNIIWA SYRQVFSEHE
     ILKFNRQKTL ESQVKNGSIS VRDFIRGLAK SEAFYRLVVS VNNNYRLVDI TLKRLLGRSS
     YNKDEQIAWS IVIGTKGFSG FVDALIDSEE YTKNFGENIV PYQRKRMEGR PHNLVTPRYG
     EDFQEKAGTV QTDWRFTLDK FYSRKSQEKQ LREGDPRKFA DLAASVGNQG NYAQRISAFD
     IDYLNAVPNR SRR