HLA-DR53

Illustration of an HLA-DR (Human MHC class II) antigen receptor with bound antigen
major histocompatibility complex, class II, DR53
Haplotypes DRA*01:DRB4*0101 DRA*01:DRB4*0102 DRA*01:DRB4*0103 DRA*01:DRB4*0104
Structure (See HLA-DR)
Identifiers
alpha *0101
Symbol(s) HLA-DRA[permanent dead link]
EBI-HLA DRA*0101
Identifiers
beta 4 *0101 *0102 *0103 *0104
Symbol(s) HLA-DRB4[permanent dead link]
EBI-HLA DRB4*0101
EBI-HLA DRB4*0102
EBI-HLA DRB4*0103
EBI-HLA DRB4*0104
Shared data
Locus chr.6 6p21.31

HLA-DR53 is an HLA-DR serotype that recognizes gene products of HLA-DRB4 locus. There are 13 alleles at this locus that encode 7 proteins.

DRB3, DRB4, and DRB5 are minor DR beta encoding loci, they have been recognized as having distinct evolution.[1] and the DRB4 locus presence is linked to HLA-DR7 seropositivity. The DRB4*locus was apparently duplicated from an ancestor of the DRB1-DRB4 common locus around 5 million years ago.[2]

DRB4 locus is only apparent in a small subset of DQ haplotypes, and most individuals lack DRB4. In addition the level of normal expression is 8 fold lower than the DRB1 in cells which can express both.[3] and lowered because of both transcriptional and post-transcriptional regulation.[4]

  1. ^ Gorski J, Rollini P, Mach B (1987). "Structural comparison of the genes of two HLA-DR supertypic groups: the loci encoding DRw52 and DRw53 are not truly allelic". Immunogenetics. 25 (6): 397–402. doi:10.1007/BF00396106. PMID 3596674. S2CID 25853147.
  2. ^ Gyllensten U, Sundvall M, Ezcurra I, Erlich HA (1991). "Genetic diversity at class II DRB loci of the primate MHC". J. Immunol. 146 (12): 4368–76. doi:10.4049/jimmunol.146.12.4368. PMID 2040804.
  3. ^ Stunz LL, Karr RW, Anderson RA (1989). "HLA-DRB1 and -DRB4 genes are differentially regulated at the transcriptional level". J. Immunol. 143 (9): 3081–6. doi:10.4049/jimmunol.143.9.3081. PMID 2809218.
  4. ^ Leen MP, Gorski J (1996). "Differential expression of isomorphic HLA-DR beta genes is not a sole function of transcription". Hum. Immunol. 50 (2): 111–20. doi:10.1016/0198-8859(96)00154-1. PMID 8891734.