HLA-A23

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HLA-A23 (A23) is a human leukocyte antigen serotype within HLA-A serotype group. The serotype is determined by the antibody recognition of α23 subset of HLA-A α-chains. For A23, the alpha, "A", chain are encoded by the HLA-A<templatestyles src="Template:Color/styles.css" />*23 allele group and the β-chain are encoded by B2M locus.[1] This group currently is dominated by A*2301. A23 and A<templatestyles src="Template:Color/styles.css" />*23 are almost synonymous in meaning. A23 is a split antigen of the broad antigen HLA-A9 and it is a sister serotype of HLA-A24.

A23 is common in Africa and regions of the Middle East, Mediterranean, and India than Europe, East Asia or the Americas.

Serotype

A23 recognition of some HLA A*23 gene products[2]
A*23 A23 A<templatestyles src="Template:Color/styles.css" />24 Sample
allele % % size (N)
Template:HNLOA 95 <templatestyles src="Template:Color/styles.css" />1 5119

Allele

Template:AlleleFreq

Haplotypes

A23-B7 is found in N.Afr. and S.Afr non-caucasians.
A23-B44 is found in Albania, Zimbabwe, Morocco, Spain and Danes.
A23-B58 is found in the !kung and Zaire.

Associated diseases

A*23:Cw*07 is associated with higher viral load in HIV[3]

References

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  2. Allele Query Form IMGT/HLA - European Bioinformatics Institute
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