title: The frequency of DRB1*1454 in South German Caucasians.
abstract: Human leukocyte antigen (HLA)-DRB1*1454 differs from HLA-DRB1*1401 in only one position in exon 3. Before description of this polymorphism both alleles were routinely typed as HLA-DRB1*1401. This prompted our study on relative frequency of these alleles. We determined relative frequencies of DRB1*1454 and DRB1*1401 by sequence-based tying (SBT) in 106 samples and found DRB1*1454 in 87.9% and DRB1*1401 in 12.1% of previously DRB1*1401/54 ambiguous tested individuals. Population frequencies were estimated using data from the local bone marrow donor database. Phenotype and genotype frequency of DRB1*1454 and DRB1*1401 were 5.592%, 0.2828, and 0.773%, 0.00391, respectively. The corresponding figures for DRB1*1404 were 0.238% and 0.00119. Other DRB1*14 alleles were very rare. The most frequent haplotype was DRB1*1454-DRB3*0202-DQB1*0503. Although DRB1*1454 is almost exclusively associated with DRB3*0202, DRB1*1401 is linked with either DRB3*0201 or DRB3*0202. HLA-DRB1*1454 is the most common DRB1*14 allele among German Caucasians and should be considered as a preferred allele over DRB1*1401.
authors.affiliation: German Red Cross Blood Donation Service, Baden-Wuerttemberg-Hessen, Ulm, Germany. d.fuerst@blutspende.de
authors.forename: D
authors.initials: D
authors.lastname: Fürst
authors.forename: G
authors.initials: G
authors.lastname: Solgi
authors.forename: H
authors.initials: H
authors.lastname: Schrezenmeier
authors.forename: J
authors.initials: J
authors.lastname: Mytilineos
mesh_terms: D005787:Gene Frequency; D005838:Genotype; D005858:Germany; D006684:HLA-DR Antigens / Q000235:genetics* / Q000276:immunology; D059811:HLA-DRB1 Chains; D006801:Humans; D010641:Phenotype; D044465:White People / Q000235:genetics*
chemical_list: D006684:HLA-DR Antigens; D059811:HLA-DRB1 Chains; C541272:HLA-DRB1*14:54 antigen