ID   PYR4_MICDP              Reviewed;         285 AA.
AC   P14879;
DT   01-APR-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1990, sequence version 1.
DT   25-MAY-2022, entry version 69.
DE   RecName: Full=Phycobilisome 31.6 kDa linker polypeptide, phycocyanin-associated, rod;
DE            Short=L-31.6/R;
GN   Name=cpcI3;
OS   Microchaete diplosiphon (Fremyella diplosiphon).
OC   Bacteria; Cyanobacteria; Nostocales; Rivulariaceae; Microchaete.
OX   NCBI_TaxID=1197;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Mazel D., Houmard J., Tandeau de Marsac N.;
RT   "A multigene family in Calothrix sp. PCC 7601 encodes phycocyanin, the
RT   major component of the cyanobacterial light harvesting antenna.";
RL   Mol. Gen. Genet. 211:296-304(1988).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2506452; DOI=10.1038/341245a0;
RA   Mazel D., Marliere P.;
RT   "Adaptive eradication of methionine and cysteine from cyanobacterial light-
RT   harvesting proteins.";
RL   Nature 341:245-248(1989).
CC   -!- FUNCTION: Rod linker protein, associated with phycocyanin. 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 {ECO:0000250};
CC       Peripheral membrane protein {ECO:0000250}; Cytoplasmic side
CC       {ECO:0000250}. Note=Associated with phycocyanin. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000255|PROSITE-ProRule:PRU00775}.
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DR   EMBL; X06083; CAA29462.1; -; Genomic_DNA.
DR   PIR; S05714; S05714.
DR   AlphaFoldDB; P14879; -.
DR   SMR; P14879; -.
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   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; Membrane; Photosynthesis; Phycobilisome; Thylakoid.
FT   CHAIN           1..285
FT                   /note="Phycobilisome 31.6 kDa linker polypeptide,
FT                   phycocyanin-associated, rod"
FT                   /id="PRO_0000199215"
FT   DOMAIN          1..180
FT                   /note="PBS-linker"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00775"
SQ   SEQUENCE   285 AA;  31687 MW;  1811E2EA83EB38B8 CRC64;
     MPITTAASRL GTSAFSNAAP IELRSNTNKA EIAQVIAAIY RQVLGNDYVL QSERLKGLES
     LLTNGNITVQ EFVRQLAKSN LYKSKFFSNN FHSRVTELNF KHLLGRAPYD ESEIIYHLDL
     YQTKGYEADI DSYIDSAEYQ TNFADNIVPY YRGFNNQLGQ KTVGFTRIFQ LYRGYATSDR
     SQIPGASARL ANELARNSAS TVIAPAGSNN GFAYRASVKG KTPSTAFQGS QAFGSGRLYR
     VEVAAISQPA IQVRRINKRS IHRRTIQLFP TSSTSQWQIA SVTPL