title: Identification of three novel alleles: DRB3*0110, DRB1*1140, and DRB1*140102.
abstract: Three novel human leukocyte antigen class II alleles (DRB3*0110, DRB1*1140, and DRB1*140102) are described here. The three novel alleles were initially detected as previously unidentified SSO hybridization patterns using CANTYPE((R)) reverse hybridization assay. Sequences were determined by cloning/sequencing. DRB3*0110 allele is identical to DRB3*010101, except for a single nucleotide substitution (CGC-->AGC) changing codon 39 from Arg to Ser. This polymorphism has not, until now, been identified in DRB allele. Thus, this is an unusual mutation as the codon 39 is a fairly conserved region. The new DRB1*1140 is identical to DRB1*1116, except for a single nucleotide substitution at codon 67 from ATC (encoding for isoleucine) to TTC (encoding for phenylalanine). This polymorphism is commonly found in DRB1*11 alleles. Compared with DRB1*140101, DRB1*140102 contains a single silent nucleotide substitution (TAT-->TAC, both encoding for tyrosine) at codon 78. This polymorphism is commonly found in DRB1*14 alleles. The three new DRB alleles may have been generated by a point mutation event. The DRB3*0110 and DRB1*140102 were identified in Caucasoid individuals. The ethnic origin of the subject carrying the DRB1*1140 allele is Egyptian. The DRB1*140102 was detected in two unrelated individuals; the DRB3*0110 and DRB1*1140 were only identified once, in a total population of 80,000.
authors.affiliation: Head Office, Canadian Blood Services, 1800 Alta Vista Drive, Ottawa, Ontario, Canada K1G 4J5. sofia.tavoularis@bloodservices.ca
authors.forename: S
authors.initials: S
authors.lastname: Tavoularis
authors.forename: C
authors.initials: C
authors.lastname: Couture
authors.forename: E
authors.initials: E
authors.lastname: Ribeiro-Barros
mesh_terms: D000483:Alleles; D001483:Base Sequence; D005091:Exons; D006684:HLA-DR Antigens / Q000235:genetics*; D059811:HLA-DRB1 Chains; D059826:HLA-DRB3 Chains; D006801:Humans; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic; D017422:Sequence Analysis, DNA
chemical_list: D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; D059826:HLA-DRB3 Chains