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APCB_ARTPT
ID   APCB_ARTPT              Reviewed;         161 AA.
AC   P72505; O06675;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1997, sequence version 1.
DT   03-AUG-2022, entry version 109.
DE   RecName: Full=Allophycocyanin beta chain;
GN   Name=apcB;
OS   Arthrospira platensis (Spirulina platensis).
OC   Bacteria; Cyanobacteria; Oscillatoriophycideae; Oscillatoriales;
OC   Microcoleaceae; Arthrospira.
OX   NCBI_TaxID=118562;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=Italy;
RA   Meesapyodsuk D., Chetkul W., Nomsasawai P., Anjard C., Tanticharoen M.,
RA   Chevadhanarak S.;
RT   "Organization and nucleotide sequence of the a, b and c subunits of
RT   allophycocyanin genes from Spirulina platensis.";
RL   Submitted (FEB-1996) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=F3;
RA   Qin S., Kawata Y., Yano S., Tseng C., Kojima H.;
RT   "Cloning and sequencing of the allophycocyanin genes from cyanobacterium
RT   Spirulina platensis.";
RL   Submitted (JUN-1996) to the EMBL/GenBank/DDBJ databases.
RN   [3]
RP   X-RAY CRYSTALLOGRAPHY (2.3 ANGSTROMS), AND METHYLATION AT ASN-71.
RX   PubMed=7783202; DOI=10.1006/jmbi.1995.0307;
RA   Brejc K., Ficner R., Huber R., Steinbacher S.;
RT   "Isolation, crystallization, crystal structure analysis and refinement of
RT   allophycocyanin from the cyanobacterium Spirulina platensis at 2.3 A
RT   resolution.";
RL   J. Mol. Biol. 249:424-440(1995).
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: 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   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; X95898; CAA65142.1; -; Genomic_DNA.
DR   EMBL; D86179; BAA19986.1; -; Genomic_DNA.
DR   PIR; S55558; S55558.
DR   PDB; 1ALL; X-ray; 2.30 A; B=1-161.
DR   PDBsum; 1ALL; -.
DR   AlphaFoldDB; P72505; -.
DR   SMR; P72505; -.
DR   MINT; P72505; -.
DR   iPTMnet; P72505; -.
DR   EvolutionaryTrace; P72505; -.
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   Thylakoid; Transport.
FT   CHAIN           1..161
FT                   /note="Allophycocyanin beta chain"
FT                   /id="PRO_0000199102"
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:0000269|PubMed:7783202"
FT   CONFLICT        21
FT                   /note="R -> A (in Ref. 2; BAA19986)"
FT                   /evidence="ECO:0000305"
FT   HELIX           4..13
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   TURN            14..16
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   HELIX           21..59
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   TURN            60..62
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   TURN            64..66
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   HELIX           75..98
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   HELIX           102..107
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   TURN            108..111
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   HELIX           112..119
FT                   /evidence="ECO:0007829|PDB:1ALL"
FT   HELIX           123..159
FT                   /evidence="ECO:0007829|PDB:1ALL"
SQ   SEQUENCE   161 AA;  17415 MW;  0B8176CBBF011431 CRC64;
     MQDAITSVIN SSDVQGKYLD RSAIQKLKAY FATGELRVRA ATTISANAAN IVKEAVAKSL
     LYSDITRPGG NMYTTRRYAA CIRDLDYYLR YATYAMLAGD PSILDERVLN GLKETYNSLG
     VPIGATVQAI QAMKEVTAGL VGADAGKEMG IYFDYICSGL S
 
 
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