HLA-A32
(MHC Class I, A cell surface antigen)
HLA-A32
About
Protein	transmembrane receptor/ligand
Structure	αβ heterodimer
Subunits	HLA-A*3201, β2-microglobulin
Older names	"A19"
Subtypes
Subtype allele Available structures A19 *3201 {{{cNick2}}} *32{{{cAllele2}}} {{{cNick3}}} *32{{{cAllele3}}} {{{cNick4}}} *32{{{cAllele4}}}
Alleles link-out to IMGT/HLA database at EBI

HLA-A32 (A32) is a human leukocyte antigen serotype within HLA-A serotype group. The serotype is determined by the antibody recognition of α³² subset of HLA-A α-chains. For A32, the alpha "A" chain are encoded by the HLA-A*32 allele group and the β-chain are encoded by B2M locus.^[1] This group currently is dominated by A*3201. A32 and A*32 are almost synonymous in meaning. A32 is a split antigen of the broad antigen serotype A19. A32 is a sister serotype of A29, A30, A31, A33, and A74.

A32 Serotyping efficiency for the predominant allele is good. There are 16 known alleles that result in 15 isoforms of HLA-A32. One isoform may be poorly expressed.^[3].

A32 is most common around the Persian Gulf and the Mediterranean Basin. It has a consistent presence in Europe. The A32 frequencies in the more isolated (genetically) peoples of Europe suggests that the A32 rise in the Mediterranean may only be partially attributable to recent migrations from the middle eastern region. There is a node in southern Europe around the Ionian Sea in which specific, European, A32-haplotypes are elevated.

A common A32 haplotype A*3201-B*5101 can be found in Oman, United Arab Emirates, SE Iran, Bulgaria, and Portugal. A second, A*3201-B*3501 can be in the Omani, UAE, and Portugal.