ID   APCF_AGLNE              Reviewed;         171 AA.
AC   P34812;
DT   01-FEB-1994, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1994, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=Allophycocyanin subunit beta-18;
DE            Short=Allophycocyanin subunit B18;
GN   Name=apcF;
OS   Aglaothamnion neglectum (Red alga).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Florideophyceae; Rhodymeniophycidae; Ceramiales;
OC   Callithamniaceae; Aglaothamnion.
OX   NCBI_TaxID=2765;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   DOI=10.1111/j.0022-3646.1993.00716.x;
RA   Apt K.E., Grossman A.R.;
RT   "The phycobilisome B18 subunit gene of allophycocyanin is located on the
RT   plastid genome in Aglaothamnion neglectum (Rhodophyta) and cotranscribed
RT   with an unidentified open reading frame.";
RL   J. Phycol. 29:716-718(1993).
CC   -!- FUNCTION: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex. Allophycocyanin has a maximum absorption at
CC       approximately 650 nanometers.
CC   -!- SUBUNIT: Heterodimer of an alpha and a beta chain. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Peripheral membrane protein {ECO:0000250}; Stromal side
CC       {ECO:0000250}. Note=Forms the core of the phycobilisome. {ECO:0000250}.
CC   -!- PTM: Contains one covalently linked bilin chromophore. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; L19263; AAA18511.1; -; Genomic_DNA.
DR   AlphaFoldDB; P34812; -.
DR   SMR; P34812; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0030089; C:phycobilisome; IEA:UniProtKB-KW.
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   3: Inferred from homology;
KW   Antenna complex; Bile pigment; Chloroplast; Chromophore;
KW   Electron transport; Membrane; Methylation; Photosynthesis; Phycobilisome;
KW   Plastid; Thylakoid; Transport.
FT   CHAIN           1..171
FT                   /note="Allophycocyanin subunit beta-18"
FT                   /id="PRO_0000199089"
FT   BINDING         82
FT                   /ligand="(2R,3E)-phycocyanobilin"
FT                   /ligand_id="ChEBI:CHEBI:85275"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000250"
FT   MOD_RES         72
FT                   /note="N4-methylasparagine"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   171 AA;  19664 MW;  20011961BDFCF680 CRC64;
     MQDTITNILN KYDLTGKYLD NNALTQITTY LNTALQRLEV VEIIQSQSSK IIKEAAARMY
     SEQPELLRPG GNSYTTRKYA MCLRDIEYYL RYATYAIIAG NNDILNERVL DGLKDTYNSL
     NVPIAPTVRS IQIMEEIIHN EISKQDLKII KKSIISEPFD HMIQNLSEQD I