ID   APCB_GALSU              Reviewed;         161 AA.
AC   P00319; P35910;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1994, sequence version 2.
DT   03-AUG-2022, entry version 112.
DE   RecName: Full=Allophycocyanin beta chain;
GN   Name=apcB;
OS   Galdieria sulphuraria (Red alga).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Cyanidiales; Cyanidiaceae; Galdieria.
OX   NCBI_TaxID=130081;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=III-D-2;
RX   PubMed=8208852; DOI=10.1104/pp.103.1.293;
RA   Liu B., Troxler R.F.;
RT   "A Cyanidium caldarium allophycocyanin beta subunit gene.";
RL   Plant Physiol. 103:293-294(1993).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=14-1-1 / Isolate 107.79/Goettingen;
RA   Kostrzewa M., Zetsche K.;
RL   Submitted (AUG-1993) to the EMBL/GenBank/DDBJ databases.
RN   [3]
RP   PROTEIN SEQUENCE, AND CHROMOPHORE.
RX   PubMed=6885776; DOI=10.1016/s0021-9258(17)44587-x;
RA   Offner G.D., Troxler R.F.;
RT   "Primary structure of allophycocyanin from the unicellular rhodophyte,
RT   Cyanidium caldarium. The complete amino acid sequences of the alpha and
RT   beta subunits.";
RL   J. Biol. Chem. 258:9931-9940(1983).
RN   [4]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 51-161.
RC   STRAIN=14-1-1 / Isolate 107.79/Goettingen;
RX   PubMed=8219057; DOI=10.1007/bf00021420;
RA   Kostrzewa M., Zetsche K.;
RT   "Organization of plastid-encoded ATPase genes and flanking regions
RT   including homologues of infB and tsf in the thermophilic red alga Galdieria
RT   sulphuraria.";
RL   Plant Mol. Biol. 23:67-76(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.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane;
CC       Peripheral membrane protein; Stromal side. Note=Forms the core of the
CC       phycobilisome.
CC   -!- PTM: Contains one covalently linked phycocyanobilin chromophore.
CC   -!- MISCELLANEOUS: Although originally identified as Cyanidium caldarium,
CC       these sequences derive from Galdieria sulphuraria. {ECO:0000305}.
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; L12540; AAB01577.1; -; Genomic_DNA.
DR   EMBL; X74548; CAA52642.1; -; Genomic_DNA.
DR   EMBL; X66698; CAA47243.1; -; Genomic_DNA.
DR   PIR; S37090; AFKKB.
DR   AlphaFoldDB; P00319; -.
DR   SMR; P00319; -.
DR   STRING; 130081.XP_005705030.1; -.
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   1: Evidence at protein level;
KW   Antenna complex; Bile pigment; Chloroplast; Chromophore;
KW   Direct protein sequencing; Electron transport; Membrane; Methylation;
KW   Photosynthesis; Phycobilisome; Plastid; Thylakoid; Transport.
FT   CHAIN           1..161
FT                   /note="Allophycocyanin beta chain"
FT                   /id="PRO_0000199098"
FT   BINDING         81
FT                   /ligand="(2R,3E)-phycocyanobilin"
FT                   /ligand_id="ChEBI:CHEBI:85275"
FT                   /note="covalent, via 1 link"
FT   MOD_RES         71
FT                   /note="N4-methylasparagine"
FT                   /evidence="ECO:0000250"
FT   CONFLICT        23
FT                   /note="I -> S (in Ref. 2; CAA52642)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        27
FT                   /note="L -> R (in Ref. 1; AAB01577 and 3; AA sequence)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        70..71
FT                   /note="GN -> LD (in Ref. 3; AA sequence)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        94
FT                   /note="Y -> L (in Ref. 3; AA sequence)"
FT                   /evidence="ECO:0000305"
FT   CONFLICT        143
FT                   /note="S -> P (in Ref. 3; AA sequence)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   161 AA;  17433 MW;  E6957EFB49370BA8 CRC64;
     MQDAITAVIN TADVQGKYLD SSIIEKLKGY FQTGELRVRA AATIAANAAG IIKDAVAKSL
     LYSDITRPGG NMYTTRRYAA CIRDLDYYLR YATYSMLAGD PSILDERVLN GLKETYNSLG
     VPIGATIQSI QAMKEVTSSL VGSEAGKEMG IYFDYICSGL S