ID   PYS1_SYNY3              Reviewed;          83 AA.
AC   P73202;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   25-MAY-2022, entry version 108.
DE   RecName: Full=Phycobilisome 8.9 kDa linker polypeptide, phycocyanin-associated, rod;
DE            Short=L-8.9/R;
DE   AltName: Full=Rod-capping linker protein;
GN   Name=cpcD; OrderedLocusNames=ssl3093;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
RN   [2]
RP   PROTEIN SEQUENCE OF 1-20.
RX   PubMed=9298645; DOI=10.1002/elps.1150180806;
RA   Sazuka T., Ohara O.;
RT   "Towards a proteome project of cyanobacterium Synechocystis sp. strain
RT   PCC6803: linking 130 protein spots with their respective genes.";
RL   Electrophoresis 18:1252-1258(1997).
RN   [3]
RP   SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=31015331; DOI=10.1128/mbio.00669-19;
RA   Liu H., Weisz D.A., Zhang M.M., Cheng M., Zhang B., Zhang H.,
RA   Gerstenecker G.S., Pakrasi H.B., Gross M.L., Blankenship R.E.;
RT   "Phycobilisomes Harbor FNRL in Cyanobacteria.";
RL   MBio 10:0-0(2019).
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   -!- SUBUNIT: Part of 2 PBS rod complexes, the conventional CpcG-PBS rod and
CC       a photosystem I-specific CpcL-PBS rod, both of which include
CC       ferredoxin--NADP reductase (petH). CpcG-PBS has on average 3 stacked
CC       phycocyanin hexamers (PC, CpcA and CpcB). Linker CpcG connects the PC
CC       stack to the thylakoid, the hexamers are linked by 1 copy of CpcC1, 1
CC       copy of CpcC2 and the stack is terminated by a single copy of CpcD. The
CC       CpcL-PBS has on average 5 stacked phycocyanin hexamers (PC, CpcA and
CC       CpcB). Linker CpcL connects the PC stack to the thylakoid, the hexamers
CC       are linked by 1 copy of CpcC1, 3 copies of CpcC2 and the stack is
CC       terminated by a single copy of CpcD. {ECO:0000269|PubMed:31015331}.
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 phycocyanin. {ECO:0000269|PubMed:31015331}.
CC   -!- SIMILARITY: Belongs to the phycobilisome linker protein family.
CC       {ECO:0000305}.
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DR   EMBL; BA000022; BAA17228.1; -; Genomic_DNA.
DR   PIR; S75314; S75314.
DR   AlphaFoldDB; P73202; -.
DR   SMR; P73202; -.
DR   STRING; 1148.1652305; -.
DR   PaxDb; P73202; -.
DR   EnsemblBacteria; BAA17228; BAA17228; BAA17228.
DR   KEGG; syn:ssl3093; -.
DR   eggNOG; COG0369; Bacteria.
DR   InParanoid; P73202; -.
DR   OMA; YSRMNEE; -.
DR   Proteomes; UP000001425; 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   InterPro; IPR008213; CpcD-like_dom.
DR   Pfam; PF01383; CpcD; 1.
DR   SMART; SM01094; CpcD; 1.
DR   PROSITE; PS51441; CPCD_LIKE; 1.
PE   1: Evidence at protein level;
KW   Antenna complex; Direct protein sequencing; Membrane; Photosynthesis;
KW   Phycobilisome; Reference proteome; Thylakoid.
FT   CHAIN           1..83
FT                   /note="Phycobilisome 8.9 kDa linker polypeptide,
FT                   phycocyanin-associated, rod"
FT                   /id="PRO_0000199233"
FT   DOMAIN          17..75
FT                   /note="CpcD-like"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00771"
SQ   SEQUENCE   83 AA;  9322 MW;  95F1570CF1CAD561 CRC64;
     MLGQSSLVGY SNTQAANRVF VYEVSGLRQT DANENSAHDI RRSGSVFIKV PYARMNDEMR
     RISRLGGTIV NIRPYQADSN EQN