ID   APCF_SYNY3              Reviewed;         169 AA.
AC   P74551;
DT   11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   03-AUG-2022, entry version 133.
DE   RecName: Full=Allophycocyanin subunit beta-18;
DE            Short=Allophycocyanin subunit B18;
GN   Name=apcF; OrderedLocusNames=slr1459;
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   FUNCTION, AND DISRUPTION PHENOTYPE.
RC   STRAIN=ATCC 27184 / PCC 6803 / N-1;
RA   Ashby M.K., Mullineaux C.W.;
RT   "The role of ApcD and ApcF in energy transfer from phycobilisomes to PS I
RT   and PS II in a cyanobacterium.";
RL   Photosyn. Res. 61:169-179(1999).
CC   -!- FUNCTION: A variant beta-allophycocyanin (AP) which forms a complex
CC       with ApcE, a phycobilisome terminal emitter that influences energy
CC       transfer to photosystem II. {ECO:0000250, ECO:0000269|Ref.2}.
CC   -!- SUBUNIT: Heterodimer of ApcE and this beta chain. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250};
CC       Peripheral membrane protein {ECO:0000250}; Cytoplasmic side
CC       {ECO:0000250}.
CC   -!- PTM: Contains one covalently linked bilin chromophore. {ECO:0000250}.
CC   -!- DISRUPTION PHENOTYPE: Increased levels of photosystem I (PSI),
CC       decreased levels of phycobilisomes (PBS) and photosystem II (PSII) per
CC       cell. Cells are unable to undergo state transitions. When combined with
CC       an ApcD deletion mutant the cells have decreased PBS, PSI and PSII, and
CC       require glucose to grow. {ECO:0000269|Ref.2}.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; BA000022; BAA18658.1; -; Genomic_DNA.
DR   PIR; S76746; S76746.
DR   AlphaFoldDB; P74551; -.
DR   SMR; P74551; -.
DR   STRING; 1148.1653747; -.
DR   PaxDb; P74551; -.
DR   EnsemblBacteria; BAA18658; BAA18658; BAA18658.
DR   KEGG; syn:slr1459; -.
DR   eggNOG; ENOG502Z8IM; Bacteria.
DR   OMA; LRDMDYF; -.
DR   PhylomeDB; P74551; -.
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   Gene3D; 1.10.490.20; -; 1.
DR   InterPro; IPR006245; ApcB.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012128; Phycobilisome_asu/bsu.
DR   InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR   PANTHER; PTHR34011:SF3; PTHR34011:SF3; 1.
DR   Pfam; PF00502; Phycobilisome; 1.
DR   PIRSF; PIRSF000081; Phycocyanin; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   TIGRFAMs; TIGR01337; apcB; 1.
PE   3: Inferred from homology;
KW   Antenna complex; Bile pigment; Chromophore; Electron transport; Membrane;
KW   Methylation; Photosynthesis; Phycobilisome; Reference proteome; Thylakoid;
KW   Transport.
FT   CHAIN           1..169
FT                   /note="Allophycocyanin subunit beta-18"
FT                   /id="PRO_0000403180"
FT   BINDING         82
FT                   /ligand="(2R,3E)-phycocyanobilin"
FT                   /ligand_id="ChEBI:CHEBI:85275"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000305"
FT   MOD_RES         72
FT                   /note="N4-methylasparagine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   169 AA;  18892 MW;  B1B83D45F0B03A15 CRC64;
     MRDAVTTLIK NYDLTGRYLD RNAMDELKAY FESGSARIAA AAMINANSAT IVKRAAAQLF
     EEIPELIRPS GNAYTTRRFS ACLRDMDYYL RYASYALIAA DNNVLDERVL QGLRETYNSL
     GVPIGPTVRG IQIMKEMIEA MAEDSSLNST DFIASPFDHM TRELSELSV