ID   APCB_NOSS1              Reviewed;         162 AA.
AC   P80557; O05713;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 123.
DE   RecName: Full=Allophycocyanin subunit beta;
GN   Name=apcB; OrderedLocusNames=alr0022;
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 [GENOMIC DNA].
RA   Cai Y.A., Schwarts S.H., Glazer A.N.;
RT   "Transposon insertion in genes coding for the biosynthesis of structural
RT   components of the Anabaena sp. phycobilisome.";
RL   Photosyn. Res. 53:109-120(1997).
RN   [2]
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   [3]
RP   PROTEIN SEQUENCE OF 2-75.
RX   PubMed=8665889; DOI=10.1111/j.1432-1033.1996.01010.x;
RA   Ducret A., Sidler W., Wehrli E., Frank G., Zuber H.;
RT   "Isolation, characterization and electron microscopy analysis of a
RT   hemidiscoidal phycobilisome type from the cyanobacterium Anabaena sp. PCC
RT   7120.";
RL   Eur. J. Biochem. 236:1010-1024(1996).
RN   [4]
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: Light-harvesting photosynthetic bile pigment-protein from the
CC       phycobiliprotein complex. Allophycocyanin has a maximum absorption at
CC       approximately 650 to 653 nanometers.
CC   -!- SUBUNIT: Heterohexamer of two alpha chains, one alpha-B chain and three
CC       beta chains.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane
CC       protein; Cytoplasmic side. Note=Forms the core of the phycobilisome.
CC   -!- PTM: Contains one covalently linked phycocyanobilin chromophore
CC       (Probable). The chromophore is added by phycocyanobilin lyase CpcS 1.
CC       {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; U96137; AAC97591.1; -; Genomic_DNA.
DR   EMBL; BA000019; BAB77546.1; -; Genomic_DNA.
DR   PIR; AF1809; AF1809.
DR   RefSeq; WP_010994199.1; NZ_RSCN01000016.1.
DR   PDB; 7EYD; EM; 3.90 A; B8/B9/D8/D9/F8/F9/H9/I8/J9/K8/L9/M8/M9/O9/P8/R8/S9/T8/U9/W8/W9/Y8/Y9/a8/a9/c9/d8/e9/f8/h8=1-162.
DR   PDBsum; 7EYD; -.
DR   AlphaFoldDB; P80557; -.
DR   SMR; P80557; -.
DR   STRING; 103690.17135000; -.
DR   EnsemblBacteria; BAB77546; BAB77546; BAB77546.
DR   GeneID; 58725379; -.
DR   KEGG; ana:alr0022; -.
DR   eggNOG; ENOG502Z7X0; Bacteria.
DR   OMA; CIRDMDY; -.
DR   OrthoDB; 1494063at2; -.
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   Direct protein sequencing; Electron transport; Membrane; Methylation;
KW   Photosynthesis; Phycobilisome; Reference proteome; Thylakoid; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:8665889"
FT   CHAIN           2..162
FT                   /note="Allophycocyanin subunit beta"
FT                   /id="PRO_0000199093"
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"
FT   CONFLICT        72
FT                   /note="N -> S (in Ref. 3; AA sequence)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   162 AA;  17305 MW;  B025AA63E578EA11 CRC64;
     MAQDAITAVI NSADVQGKYL DTAALEKLKA YFSTGELRVR AATTISANAA AIVKEAVAKS
     LLYSDITRPG GNMYTTRRYA ACIRDLDYYL RYATYAMLAG DPSILDERVL NGLKETYNSL
     GVPVGATVQA IQAIKEVTAS LVGADAGKEM GIYLDYISSG LS