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

Goldmann, W., Hunter, N., Benson, G., Foster, J. D. and Hope, J. (1991) Different scrapie-associated fibril proteins (PrP) are encoded by lines of sheep selected for different alleles of the Sip gene. Journal of General Virology, 72 (10). pp. 2411-2417. ISSN 0022-1317

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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.

Item Type:	Article
Uncontrolled Keywords:	virology ,/dk/atira/pure/subjectarea/asjc/2400/2406
Faculty \ School:	Faculty of Science > School of Biological Sciences
Related URLs:	http://www.scopus.com/inward/record.url?...
Depositing User:	LivePure Connector
Date Deposited:	28 Nov 2025 11:30
Last Modified:	28 Nov 2025 11:30
URI:	https://ueaeprints.uea.ac.uk/id/eprint/101130
DOI:	10.1099/0022-1317-72-10-2411

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