Characterization of a novel HLA-DQB1 allele, DQB1*020102

A novel human leukocyte antigen (HLA)-DQB1 allele, DQB1*020102, was detected in a 28-year-old woman of Han ethnic in Guangzhou, China. Compared with HLA-DQB1*020101 and HLA-DQB1*0202, they differed in only one nucleotide at the position 167 (C to T) of exon 2, which was a highly conserved position. This is a synonymous mutation, which does not cause any change in the amino acid sequence of mature protein.

A novel HLA-DRB1*09 allele, HLA-DRB1*090103*, isolated from the Han population of Guangdong, China

A novel HLA-DRB1*09 allele, HLA-DRB1*090103, has been identified in a Guangdong Han person. Its sequence was confirmed by sequencing polymerase chain reaction products and clones. This allele differed by one nucleotide from HLA-DRB1*090102 at position 50(G-->C), which represents a silent mutation.

Identification of a novel HLA-DPB1 allele--DPB1*0102

In this report, we describe the identification of a novel HLA-DPB1 allele, DPB1*0102, which was first found in a 27-year-old woman and was later detected again in another person, from the Han population of China. According to the nucleotide alignment, DPB1*0102 was the most similar to DPB1*0202, with only one nucleotide substitution from A to G at position 192 among three closely related alleles--DPB1*0202, DPB1*2401 and DPB1*0501. This substitution was a non-synonymous one, which caused a change of amino acid from E to K at codon 69 of DP beta-chain in the mature protein.

A novel HLA-DRB1 allele, DRB1*0449, with a rare point mutation found in the Han population of Guangdong China

Anovel HLA-DRB1 allele, DRB1*0449, has been identified in the Han population of Guangdong Province of China. Compared with DRB1*0406, it has only one single-nucleotide mutation from G to A at position 18 of exon 2, which causes a change in the protein sequence from valine to isoleucine at codon 11 of DR beta chain.