Shadow of prion protein (SPRN)

Shadow of prion protein (SPRN), encoded by the SPRN gene, is a prion-like glycosylphosphatidylinositol-anchored protein found predominantly in the brain, with important roles in neuroprotection and prion disease pathogenesis. Sho interacts with the normal prion protein (PrP^C), stimulating its conversion to the pathogenic prion form (PrP^Sc), and genetic polymorphisms in the SPRN gene have been shown to influence susceptibility to various prion diseases in humans and animals. Sho also contributes to physiological processes such as embryonic development and mammary gland differentiation, with knockout models exhibiting embryonic lethality and lactation failure. The 3D structure of Sho comprises two α-helices linked by an unstructured coil region, and its interaction domain with PrP is highly conserved across species. Although Sho is implicated in multiple neurodegenerative conditions, no approved therapeutic drugs directly target SPRN; instead, ongoing research is focused on genetic and functional modulation of its activity.

Other names

ShadooProtein shadooSHOShadow of prion protein (homolog)bA108K14.1FLJ41197Hypothetical protein BC004409

No direct drugs are currently reported; the mechanism of action for hypothetical inhibitors would likely involve interference with Sho-mediated conversion of PrP(C) to PrP(Sc) or modulation of Sho-PrP interaction. Potential mechanisms could include downregulation of protein expression, inhibition of protein-protein interaction, or genetic modulation.