PMID- 16029440 OWN - NLM STAT- MEDLINE DCOM- 20050919 LR - 20050720 IS - 0001-2815 (Print) IS - 0001-2815 (Linking) VI - 66 IP - 2 DP - 2005 Aug TI - The recombinant HLA-B*5518 allele supports the evidence of conserved haplotype association of rare alleles. PG - 156-9 AB - Allelic polymorphism of the major histocompatibility complex arises mostly from gene recombination. Intralocus gene recombination usually involves short fragments of DNA leading most commonly to single-nucleotide substitutions and rarely involves large fragments. Here, we report a new recombinant human leukocyte antigen (HLA)-B*5518 allele that has arisen via recombination of a large fragment of DNA spanning more than 70 nucleotides. During routine HLA typing of potential volunteer donors for the National Marrow Donor Program((R)), a new HLA-B allele was identified in two donors from Guam. The allele, B*5518, appears to be a product of recombination between B*5502 and B*40. Exons 1, 3, and 4 of the new allele belong to B*5502, whereas part of exon 2 belongs to one of B*40 alleles. Introns 1 and 2 appear to belong to B*55, suggesting that the recombination event may have occurred within the homologous parts of exon 2. FAU - Lebedeva, T V AU - Lebedeva TV AD - HLA Laboratory, American Red Cross Blood Services, Dedham, MA 02026, USA. lebedevat@usa. redcross.org FAU - Huang, A AU - Huang A FAU - Ohashi, M AU - Ohashi M FAU - Sibilia, P AU - Sibilia P FAU - Alosco, S M AU - Alosco SM FAU - Kempenich, J AU - Kempenich J FAU - Yu, N AU - Yu N LA - eng PT - Journal Article PL - England TA - Tissue Antigens JT - Tissue antigens JID - 0331072 RN - 0 (HLA-B Antigens) SB - IM MH - Alleles MH - Amino Acid Sequence MH - Base Sequence MH - Genotype MH - Guam MH - HLA-B Antigens/*genetics/immunology MH - *Haplotypes MH - Humans MH - Molecular Sequence Data MH - Polymorphism, Single Nucleotide MH - *Recombination, Genetic MH - Sequence Homology, Nucleic Acid MH - Tissue Donors EDAT- 2005/07/21 09:00 MHDA- 2005/09/20 09:00 CRDT- 2005/07/21 09:00 PHST- 2005/07/21 09:00 [pubmed] PHST- 2005/09/20 09:00 [medline] PHST- 2005/07/21 09:00 [entrez] AID - TAN442 [pii] AID - 10.1111/j.1399-0039.2005.00442.x [doi] PST - ppublish SO - Tissue Antigens. 2005 Aug;66(2):156-9. doi: 10.1111/j.1399-0039.2005.00442.x.