ID   B2MG_MACFA              Reviewed;         119 AA.
AC   Q8SPW0; Q4R7B2;
DT   30-MAY-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-2002, sequence version 1.
DT   03-AUG-2022, entry version 76.
DE   RecName: Full=Beta-2-microglobulin;
DE   Flags: Precursor;
GN   Name=B2M; ORFNames=QtsA-15719;
OS   Macaca fascicularis (Crab-eating macaque) (Cynomolgus monkey).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC   Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini;
OC   Cercopithecidae; Cercopithecinae; Macaca.
OX   NCBI_TaxID=9541;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Spleen;
RA   Namenuk A.K., Hong K., Meng Y.G., Shields R.L., Cromwell M.E.M.,
RA   Presta L.G.;
RT   "Binding of human IgG to cynomolgus FcR.";
RL   Submitted (FEB-2002) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Testis;
RG   International consortium for macaque cDNA sequencing and analysis;
RT   "DNA sequences of macaque genes expressed in brain or testis and its
RT   evolutionary implications.";
RL   Submitted (JUN-2005) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Component of the class I major histocompatibility complex
CC       (MHC). Involved in the presentation of peptide antigens to the immune
CC       system (By similarity). {ECO:0000250}.
CC   -!- SUBUNIT: Heterodimer of an alpha chain and a beta chain. Beta-2-
CC       microglobulin is the beta-chain of major histocompatibility complex
CC       class I molecules (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Secreted {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the beta-2-microglobulin family. {ECO:0000305}.
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DR   EMBL; AF485817; AAL92100.1; -; mRNA.
DR   EMBL; AB168908; BAE01010.1; -; mRNA.
DR   AlphaFoldDB; Q8SPW0; -.
DR   SMR; Q8SPW0; -.
DR   STRING; 9541.XP_005559470.1; -.
DR   Ensembl; ENSMFAT00000101229; ENSMFAP00000047025; ENSMFAG00000034244.
DR   eggNOG; ENOG502S8GM; Eukaryota.
DR   GeneTree; ENSGT00690000102227; -.
DR   Proteomes; UP000233100; Chromosome 7.
DR   Bgee; ENSMFAG00000034244; Expressed in spleen and 13 other tissues.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0042612; C:MHC class I protein complex; IEA:UniProtKB-KW.
DR   GO; GO:0002474; P:antigen processing and presentation of peptide antigen via MHC class I; IEA:UniProtKB-KW.
DR   GO; GO:0006955; P:immune response; IEA:InterPro.
DR   CDD; cd05770; IgC_beta2m; 1.
DR   Gene3D; 2.60.40.10; -; 1.
DR   InterPro; IPR015707; B2Microglobulin.
DR   InterPro; IPR007110; Ig-like_dom.
DR   InterPro; IPR036179; Ig-like_dom_sf.
DR   InterPro; IPR013783; Ig-like_fold.
DR   InterPro; IPR003006; Ig/MHC_CS.
DR   InterPro; IPR003597; Ig_C1-set.
DR   PANTHER; PTHR19944:SF62; PTHR19944:SF62; 1.
DR   Pfam; PF07654; C1-set; 1.
DR   SMART; SM00407; IGc1; 1.
DR   SUPFAM; SSF48726; SSF48726; 1.
DR   PROSITE; PS50835; IG_LIKE; 1.
DR   PROSITE; PS00290; IG_MHC; 1.
PE   3: Inferred from homology;
KW   Disulfide bond; Immunity; Immunoglobulin domain; MHC I; Reference proteome;
KW   Secreted; Signal.
FT   SIGNAL          1..20
FT                   /evidence="ECO:0000250"
FT   CHAIN           21..119
FT                   /note="Beta-2-microglobulin"
FT                   /id="PRO_0000018783"
FT   DOMAIN          25..114
FT                   /note="Ig-like C1-type"
FT   DISULFID        45..100
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00114"
SQ   SEQUENCE   119 AA;  13567 MW;  A11F5BEF5E38761C CRC64;
     MSPSVALAVL ALLSLSGLEA IQRTPKIQVY SRHPPENGKP NFLNCYVSGF HPSDIEVDLL
     KNGEKMGKVE HSDLSFSKDW SFYLLYYTEF TPNEKDEYAC RVNHVTLSGP RTVKWDRDM