HLA-B44

HLA-B (alpha)-β2MG with bound peptide
major histocompatibility complex (human), class I, B44
Alleles B*4401, 4402, 4403 . .
Structure (See HLA-B)
Shared data
Locus chr.6 6p21.31

HLA-B44 (B44) is an HLA-B serotype. The serotype identifies the B*44 gene-allele protein products of HLA-B.[1]

B44 is a split antigen of the broad antigen B12, and is a sister type of B45.

Serotype

Serotypes B44, B12, and B45 recognition of the
HLA B*44 gene products[2]
B*44 B44 B12 B45 Sample
allele % % % size (N)
*4402 98 6959
*4403 94 2854
*4404 65 42
*4405 92 130
*4406 44 9
B*4401 was shown to be B*4402 after errors corrected.
Alleles link-out to IMGT/HLA Database at EBI

Disease

HLA-B44 increases recurrent sinopulmonary infections.[3] Protective effects: HLA-B44 appears to be protective against autoimmune lymphoproliferative syndrome in patients with C95 defect (ALPS type Ia).[4] B44 may be a cofactor in ankylosing spondylitis[5]

References

  1. ↑ Marsh SG, Albert ED, Bodmer WF, et al. (2005). "Nomenclature for factors of the HLA system, 2004". Tissue Antigens. 65 (4): 301–69. PMID 15787720. doi:10.1111/j.1399-0039.2005.00379.x.
  2. ↑ derived from IMGT/HLA
  3. ↑ Johnston DT, Mehaffey G, Thomas J, et al. (June 2006). "Increased frequency of HLA-B44 in recurrent sinopulmonary infections (RESPI)". Clin. Immunol. 119 (3): 346–50. PMID 16542878. doi:10.1016/j.clim.2006.02.001.
  4. ↑ Vacek MM, Schäffer AA, Davis J, et al. (January 2006). "HLA B44 is associated with decreased severity of autoimmune lymphoproliferative syndrome in patients with CD95 defects (ALPS type Ia)". Clin. Immunol. 118 (1): 59–65. PMID 16257267. doi:10.1016/j.clim.2005.09.006.
  5. ↑ Purrmann J, Zeidler H, Bertrams J, et al. (November 1988). "HLA antigens in ankylosing spondylitis associated with Crohn's disease. Increased frequency of the HLA phenotype B27,B44". J. Rheumatol. 15 (11): 1658–61. PMID 3266250.
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