[Sequence analysis of a novel human leukocyte antigen allele B*5827].

Objective To investigate the molecular basis for a novel human leukocyte antigen(HLA)allele B * 5827. Methods DNA from the proband was analyzed by polymerase chain reaction-sequence specific oligonucleotide (PCR-SSO) typing. The amplified product was sequenced bidirectionally. Results Abnormal HLA-B locus was observed and its nucleotide sequence was different from the known HLA-B allele sequences, with highest homology to HLA-B * 5820 allele. It differs from HLA-B * 5820 by 8 nucleotide substitutions in exon 3, i. e. , nt 290 (G＞C), nt 346 (T＞A), nt 390 (A＞C), nt 404 (G＞C),nt 413 (C＞G), nt 471 (A＞G), nt 486 (A＞G) and nt 487 (C＞A), resulting in an amino acid change from ser＞arg at nt 97, phe＞tyr at nt 115, ser＞arg at nt 130, thr＞ala at nt 157 and thr＞glu at nt 162.Nucleotide differences of nt 404(G＞C) and nt 413(C＞G) did not change amino acid. Conclusion The sequences of the novel allele have been submitted to GenBank (access No. GU071234). A novel HLA class Ⅰ allele B * 5827 has been officially assigned by the WHO HLA Nomenclature Committee in Jan 2010. Key words: human leukocyte antigen B * 5827;  allele;  polymerase chain reaction-sequence specific oligonucleotide;  sequence analysis