title: A novel DRB1*13 allele (DRB1*1327) on a DR17, DQ2 haplotype with a DRB1*0301 sequence motif in the 2nd hyperpolymorphic region.
abstract: In a sample from a Netherlands Caucasian, we found a new DRB1*13 allele (DRB1*1327). The nucleotide sequence of the second exon of the novel allele was identical to DRB1*1301 except for a single productive base substitution changing codon 26 from TTC to TAC, encoding phenylalanine and tyrosine, respectively. The new allele shares sequence with DRB1*03011 from codons 5 to 66. The haplotype carrying the new allele was, from known linkage disequilibria, deduced to be DRB1*1327, DRB3*0101, DQA1*05011, DQB1*0201, i.e. similar to the DR17, DQ2 haplotype, which suggests that the DRB1*1327 allele has arisen by a double recombination event between a DR13 donor haplotype and a DR17, DQ2 recipient haplotype.
authors.affiliation: Department of Bioscience at Novum, Karolinska Institute, Huddinge, Sweden. marie.schaffer@cbt.ki.se
authors.forename: M
authors.initials: M
authors.lastname: Schaffer
authors.forename: O
authors.initials: O
authors.lastname: Olerup
mesh_terms: D000483:Alleles; D001483:Base Sequence; D004247:DNA; D005091:Exons; D006683:HLA-DQ Antigens / Q000145:classification / Q000235:genetics; D006684:HLA-DR Antigens / Q000145:classification / Q000235:genetics*; D059811:HLA-DRB1 Chains; D006239:Haplotypes; D006801:Humans; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic
chemical_list: D006683:HLA-DQ Antigens; C053186:HLA-DQ2 antigen; D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; C553502:HLA-DRB1*03:01 antigen; D004247:DNA