Caprine PrP variants harboring Asp-146, His-154 and Gln-211 alleles display reduced convertibility upon interaction with pathogenic murine prion protein in scrapie infected cells.

Scrapie, a prion disease of sheep and goats, is a disease destroying small ruminants. Because of the contagious nature, outbreaks of epidemics may occur in the flock / herd consists of animals that are very vulnerable. Field studies identified caprine scrapie PrP-protective variant, save a specific single amino acid change (Met-142, Arg-143, Asp-146, Ser-146, His-154, Gln-211 and Lys-222). they are under the effect of further evaluation, and aims Bovine Recombinant Proteins determine the most protective alleles. We assess some of these variants (Asp-146, His-154, Gln-211 and Lys-222), after the expression of exogenous them as murine chimera-caprine in murine cell lines infected scrapie-. 

We reported that exogenously expressed PrPs undergo conformational conversion on interaction with endogenous murine pathological prion protein (PrPSC), which results in a goat-specific detection and most of PK-resistant group. This group displays PK-resistance pattern different from the one detected in the case of natural goat scrapie. In cellular models, the potential conversion of different conformations are assigned to variants tested. 

Molecules carrying Asp 146, His-154 and Gln-211 allele showed a conversion rate to be significantly lower compared to wild-type, confirming their protective effects against scrapie. Although we used a heterologous conversion system, it is to our knowledge, the first study of the caprine PrP scrapie variants in a mobile context, which confirms the protective effect of multiple alleles studied.

Identification of caprine Keratin-Associated Protein 20-2 (KAP20-2) Gene and Its Effect on Cashmere Traits.

Genes encoding high glycine / tyrosine keratin-associated protein 20-2 (KAP20-2) gene has been described in humans, but has not been identified in livestock species. A search for similar sequences in the human genome using KAP20-2 caprine gene (KRTAP20-2) revealed homologous sequences on chromosome 1.

 Three distinct banding pattern represents a different order (AC) in Longdong Cashmere goats were identified using polymerase chain reaction- stranded polymorphism conformation (PCR-SSCP) single analysis. This sequence together with high Cat Recombinant Proteins sequence similarity to the human and mouse sequences KRTAP20-2, show that A-C is caprine variant of the human and mouse genes. Four single nucleotide polymorphisms (SNPs) were identified, and three of them are non-identical. KRTAP20-2 found expressed in the hair follicle secondary, but not in the heart, liver, lungs, kidneys, spleen, or muscle Longissimus dorsi