Two bi-allelic single nucleotide polymorphisms within the promoter region of the horse tumour necrosis factor alpha gene.
Primers based on GenBank sequences within the 5' untranslated region (UTR) of the human and horse tumour necrosis factor alpha (TNF-alpha) genes were designed and used to amplify a 522-bp product. Sequencing of five clones derived from five independent PCRs obtained from three different animals of three different breeds (Old Kladruber, Akhal-Teke and Shetland Pony) revealed a high level of sequence identity to the TNF-alpha promoter regions of other species. The existing GenBank horse sequences were confirmed and extended upstream by 230 nucleotides. Based on the sequence obtained, a new horse-specific forward primer was designed to amplify a 213-bp PCR product, which was screened for polymorphism using single-strand conformation polymorphism (SSCP). Three allelic variants of the horse TNF-alpha gene were identified and sequenced (GenBank accession numbers ADF 349558-60). Two single nucleotide polymorphisms explained the existence of the three SSCP alleles detected: C/T and T/C single base pair substitutions at positions 137 and 147, respectively. Differences in allelic frequencies between Old Kladruber and Akhal-Teke breeds were observed.
Matiasovic
J
J
Institute of Animal Breedint and Genetics, Faculty of Vererinary, Medicine, Brno, Chzech Republic.
Lukeszová
L
L
Horín
P
P
D020121:5' Untranslated Regions; D000818:Animals; D005787:Gene Frequency; D006736:Horses / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D018807:Polymorphism, Single-Stranded Conformational; D011401:Promoter Regions, Genetic; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
D020121:5' Untranslated Regions; D014409:Tumor Necrosis Factor-alpha