Different scrapie-associated fibril proteins (PrP) are encoded by lines of sheep selected for different alleles of the Sip gene

W Goldmann, N Hunter, G Benson, J D Foster, J Hope

Research output: Contribution to journalArticlepeer-review

Abstract

The incubation period of scrapie in sheep is controlled by the Sip gene which has two alleles (sA and pA). Following experimental challenge with SSBP/1 scrapie, a short incubation period is conferred by the partially dominant sA allele. Restriction fragment length polymorphisms of the scrapie-associated fibril protein (PrP) gene are associated with the Sip alleles. By sequencing the protein coding region of the PrP gene in Cheviot sheep selected for differing Sip genotypes, we have found four PrP protein variants which differ at three positions: amino acid 112 (Ala/Val), amino acid 130 (Arg/His) and amino acid 147 (Arg/Gln). The Val 112 variant can be distinguished at the DNA level by an RspXI restriction site which is not present in the Ala 112 form. Val 112 appears to be linked to a short incubation period of experimentally induced scrapie in the Cheviot sheep and therefore with the Sip sA allele. These results provide new evidence that the PrP protein may be a product of the Sip locus.
Original languageEnglish
Pages (from-to)2411-7
Number of pages7
JournalJournal of General Virology
Volume72 ( Pt 10)
Publication statusPublished - Oct 1991

Keywords

  • Alleles
  • Animals
  • Arginine
  • Base Sequence
  • DNA, Viral
  • Genotype
  • Glycine
  • Haplotypes
  • Molecular Sequence Data
  • Polymorphism, Restriction Fragment Length
  • PrPSc Proteins
  • Prions
  • Restriction Mapping
  • Scrapie
  • Sheep

Fingerprint

Dive into the research topics of 'Different scrapie-associated fibril proteins (PrP) are encoded by lines of sheep selected for different alleles of the Sip gene'. Together they form a unique fingerprint.

Cite this