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MGP001443

Record overview

MGPD IDMGP001443
Gene ID3106
SpeciesHomo sapiens (Human)
Gene Namemajor histocompatibility complex, class I, B
Gene Symbol HLA-B
SynonymsAS; HLAB; SPDA1;
Alternate namesmajor histocompatibility complex, class I, B; HLA class I histocompatibility antigen, B alpha chain; MHC Class I HLA heavy chain; MHC HLA-B cell surface glycoprotein; MHC HLA-B transmembrane glycoprotein; MHC class I antigen GN00104; MHC class I antigen HLA-B heavy chain; MHC class I antigen SHCHA; leukocyte antigen class I-B; lymphocyte antigen;
Chromosome6
Map Location6p21.3
SummaryHLA-B belongs to the HLA class I heavy chain paralogues. This class I molecule is a heterodimer consisting of a heavy chain and a light chain (beta-2 microglobulin). The heavy chain is anchored in the membrane. Class I molecules play a central role in the immune system by presenting peptides derived from the endoplasmic reticulum lumen. They are expressed in nearly all cells. The heavy chain is approximately 45 kDa and its gene contains 8 exons. Exon 1 encodes the leader peptide, exon 2 and 3 encode the alpha1 and alpha2 domains, which both bind the peptide, exon 4 encodes the alpha3 domain, exon 5 encodes the transmembrane region and exons 6 and 7 encode the cytoplasmic tail. Polymorphisms within exon 2 and exon 3 are responsible for the peptide binding specificity of each class one molecule. Typing for these polymorphisms is routinely done for bone marrow and kidney transplantation. Hundreds of HLA-B alleles have been described. [provided by RefSeq, Jul 2008]
OrthologsView orthologs and multiple alignments for HLA-B

Proteins

major histocompatibility complex, class I, B precursor
Refseq ID:NP_005505
Protein GI:17986001
UniProt ID:P01889
mRNA ID:NM_005514
Length:362
RefSeq Status:
MLVMAPRTVLLLLSAALALTETWAGSHSMRYFYTSVSRPGRGEPRFISVGYVDDTQFVRFDSDAASPREEPRAPWIEQEGPEYWDRNTQIYKAQAQTDRE
SLRNLRGYYNQSEAGSHTLQSMYGCDVGPDGRLLRGHDQYAYDGKDYIALNEDLRSWTAADTAAQITQRKWEAAREAEQRRAYLEGECVEWLRRYLENGK
DKLERADPPKTHVTHHPISDHEATLRCWALGFYPAEITLTWQRDGEDQTQDTELVETRPAGDRTFQKWAAVVVPSGEEQRYTCHVQHEGLPKPLTLRWEP
SSQSTVPIVGIVAGLAVLAVVVIGAVVAAVMCRRKSSGGKGGSYSQAACSDSAQGSDVSLTA
 
sig_peptide: 1..24
inference: COORDINATES: ab initio prediction:SignalP:4.0
calculated_mol_wt: 2585
peptide sequence: 
MLVMAPRTVLLLLSAALALTETWA

mat_peptide: 25..362
product: major histocompatibility complex, class I, B
calculated_mol_wt: 37893
peptide sequence: 
GSHSMRYFYTSVSRPGRGEPRFISVGYVDDTQFVRFDSDAASPREEPRAPWIEQEGPEYWDRNTQIYKAQAQTDRESLRNLRGYYNQSEAGSHTLQSMYG
CDVGPDGRLLRGHDQYAYDGKDYIALNEDLRSWTAADTAAQITQRKWEAAREAEQRRAYLEGECVEWLRRYLENGKDKLERADPPKTHVTHHPISDHEAT
LRCWALGFYPAEITLTWQRDGEDQTQDTELVETRPAGDRTFQKWAAVVVPSGEEQRYTCHVQHEGLPKPLTLRWEPSSQSTVPIVGIVAGLAVLAVVVIG
AVVAAVMCRRKSSGGKGGSYSQAACSDSAQGSDVSLTA
 
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