Abstract:
:We have investigated the polymorphism of TAP genes and the distribution of human leukocyte antigen (HLA)-TAP haplotypes in 90 Korean families (180 parents and 233 children), previously typed for HLA class II alleles. TAP1 (codons 333 and 637) and TAP2 (codons 379, 565, 577, 651, 665, and 687) typings were carried out by use of polymerase chain reaction-restriction fragment length polymorphism method. For TAP1, four alleles (gene frequency: A 81.9%, B 15.0%, C 2.5%, D 0.5%) and for TAP2, nine alleles (A1 31.7%, A2 14.2%, B 32.5%, Bky2 6.1%, C 6.9%, D 2.5%, E 3.9%, G 0.8%, and H 1.4%) were detected. Sixteen different TAP1-TAP2 haplotypes were observed with frequencies > 0.5%, and we found that significant linkage disequilibrium was present between TAP1 and TAP2 loci (p < 0.001). When HLA-DRB1-DQB1 haplotypes were extended to TAP1 and TAP2 loci, much diversification of haplotypes was observed: 26 different DRB1-DQB1 haplotypes (frequencies > 0.8%) formed 90 different extended haplotypes. Eight recombinant haplotypes between DQB1 and DPB1 loci were observed, and most (seven of eight) of the recombinations occurred between TAP2 and DPB1 loci. These results add more evidence to the view that recombination hot spot is present within and around TAP gene region.
journal_name
Hum Immunoljournal_title
Human immunologyauthors
Whang DH,Park H,Roh EY,Park MHdoi
10.1016/j.humimm.2005.07.001subject
Has Abstractpub_date
2005-09-01 00:00:00pages
998-1007issue
9eissn
0198-8859issn
1879-1166pii
S0198-8859(05)00128-Xjournal_volume
66pub_type
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