PRNP (prion protein) is the human gene encoding for the major prion protein PrP (protease-resistant-protein, Pr for prion, and P for protein), also known as CD230 (cluster of differentiation230).[5][6][7][8] Expression of the protein is most predominant in the nervous system but occurs in many other tissues throughout the body.[9][10][11]
The protein can exist in multiple isoforms, the normal PrPC and protease-resistant forms designated PrPRes such as the disease-causing PrPSc(scrapie) and an isoform located in mitochondria. The misfolded version PrPSc is associated with a variety of cognitive disorders and neurodegenerative diseases such as in animals: ovine scrapie, bovine spongiform encephalopathy (BSE, mad cow disease), feline spongiform encephalopathy, transmissible mink encephalopathy (TME), exotic ungulate encephalopathy, chronic wasting disease (CWD) which affects cervids; and in humans: Creutzfeldt–Jakob disease (CJD), fatal familial insomnia (FFI), Gerstmann–Sträussler–Scheinker syndrome (GSS), kuru, and variant Creutzfeldt–Jakob disease(vCJD). Similarities exist between kuru, thought to be due to human ingestion of diseased individuals, and vCJD, thought to be due to human ingestion of BSE-tainted cattle products.
https://en.wikipedia.org/wiki/PRNP
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