ID   APCF_NOSS1              Reviewed;         169 AA.
AC   Q7A2D6;
DT   11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 106.
DE   RecName: Full=Allophycocyanin subunit beta-18;
DE            Short=Allophycocyanin subunit B18;
GN   Name=apcF; OrderedLocusNames=all2327;
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 [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   [2]
RP   CHROMOPHORE ATTACHMENT AT CYS-82.
RC   STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX   PubMed=17726096; DOI=10.1073/pnas.0706209104;
RA   Zhao K.H., Su P., Tu J.M., Wang X., Liu H., Ploscher M., Eichacker L.,
RA   Yang B., Zhou M., Scheer H.;
RT   "Phycobilin:cystein-84 biliprotein lyase, a near-universal lyase for
RT   cysteine-84-binding sites in cyanobacterial phycobiliproteins.";
RL   Proc. Natl. Acad. Sci. U.S.A. 104:14300-14305(2007).
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}.
CC   -!- SUBUNIT: Heterodimer of ApcE and this beta chain. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane
CC       protein; Cytoplasmic side. Note=A minor component of the phycobilisome
CC       core. {ECO:0000250}.
CC   -!- PTM: Contains one covalently linked bilin chromophore (By similarity).
CC       The chromophore is added by phycocyanobilin lyase CpcS 1.
CC       {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; BA000019; BAB74026.1; -; Genomic_DNA.
DR   RefSeq; WP_010996483.1; NZ_RSCN01000004.1.
DR   PDB; 7EYD; EM; 3.90 A; Q9/g9=1-169.
DR   PDBsum; 7EYD; -.
DR   AlphaFoldDB; Q7A2D6; -.
DR   SMR; Q7A2D6; -.
DR   STRING; 103690.17131419; -.
DR   EnsemblBacteria; BAB74026; BAB74026; BAB74026.
DR   KEGG; ana:all2327; -.
DR   eggNOG; ENOG502Z8IM; Bacteria.
DR   OMA; LRDMDYF; -.
DR   OrthoDB; 1652060at2; -.
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   CDD; cd12126; APC_beta; 1.
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   1: Evidence at protein level;
KW   3D-structure; Antenna complex; Bile pigment; Chromophore;
KW   Electron transport; Membrane; Methylation; Photosynthesis; Phycobilisome;
KW   Reference proteome; Thylakoid; Transport.
FT   CHAIN           1..169
FT                   /note="Allophycocyanin subunit beta-18"
FT                   /id="PRO_0000403178"
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;  18636 MW;  AC6461BF90FD41D1 CRC64;
     MRDAVTSLIK NYDVAGRYFD RNAIDTLKDY FDSGTARVQA AAAINSNAAA LVKQAGSKLF
     EELPELIRPG GNAYTTRRLA ACLRDMDYYL RYATYALVAG NTNVLDERVL QGLRETYNSL
     GVPIGPTVRG VQILKDLVKE QVAGAGIANT TFVEEPFDHI TRELSERDV