title: Short communication: characterization of DRB3 alleles in the MHC of Japanese shorthorn cattle by polymerase chain reaction-sequence-based typing.
abstract: A study was made of exon 2 of the bovine leukocyte antigen BoLA-DRB3 gene of 176 Japanese Shorthorn cattle at six farms in Japan using polymerase chain reaction-sequence-based typing (PCR-SBT). An initial round of PCR using conserved locus-specific primers, a second round of PCR using a locus-specific primer, and at least one sequence-specific primer (SSP), followed by direct sequencing of products of PCR with SSP were conducted. Twenty-one BoLA-DRB3 alleles were identified with frequencies ranging from 0.3 to 19.6% in 176 individuals, and two of these alleles were new alleles that have not been reported previously. The three most frequently observed alleles (DRB3*1201, *0301, and *0801) accounted for 43.8% of the alleles in the population of these herds. Next, we tested the products of amplification by PCR of BoLA-DRB3 exon 2 with RsaI, BstYI, and HaeIII, and identified 18 previously described PCR-restriction fragment length polymorphism (RFLP) types. The PCR-RFLP types reflected the results of PCR-SBT exactly. Our results indicate that exon 2 of the BoLA-DRB3 gene is highly polymorphic in Japanese Shorthorn cattle.
authors.affiliation: Retrovirus Research Unit, RIKEN, Wako, Saitama, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Takeshima
authors.forename: Y
authors.initials: Y
authors.lastname: Nakai
authors.forename: M
authors.initials: M
authors.lastname: Ohta
authors.forename: Y
authors.initials: Y
authors.lastname: Aida
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D000818:Animals; D002417:Cattle / Q000235:genetics*; D005091:Exons; D005787:Gene Frequency; D005802:Genes, MHC Class II / Q000276:immunology*; D008285:Major Histocompatibility Complex / Q000235:genetics*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods / Q000662:veterinary; D012150:Polymorphism, Restriction Fragment Length; D016415:Sequence Alignment / Q000662:veterinary