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- W2280346314 abstract "Prion diseases involve the conversion of the endogenous cellular prion protein, PrP(C), into a misfolded infectious isoform, PrP(Sc). Several functions have been attributed to PrP(C), and its role has also been investigated in the olfactory system. PrP(C) is expressed in both the olfactory bulb (OB) and olfactory epithelium (OE) and the nasal cavity is an important route of transmission of diseases caused by prions. Moreover, Prnp(-/-) mice showed impaired behavior in olfactory tests. Given the high PrP(C) expression in OE and its putative role in olfaction, we screened a mouse OE cDNA library to identify novel PrP(C)-binding partners. Ten different putative PrP(C) ligands were identified, which were involved in functions such as cellular proliferation and apoptosis, cytoskeleton and vesicle transport, ubiquitination of proteins, stress response, and other physiological processes. In vitro binding assays confirmed the interaction of PrP(C) with STIP1 homology and U-Box containing protein 1 (Stub1) and are reported here for the first time. Stub1 is a co-chaperone with ubiquitin E3-ligase activity, which is associated with neurodegenerative diseases characterized by protein misfolding and aggregation. Physiological and pathological implications of PrP(C)-Stub1 interaction are under investigation. The PrP(C)-binding proteins identified here are not exclusive to the OE, suggesting that these interactions may occur in other tissues and play general biological roles. These data corroborate the proposal that PrP(C) is part of a multiprotein complex that modulates several cellular functions and provide a platform for further studies on the physiological and pathological roles of prion protein." @default.
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- W2280346314 date "2015-08-28" @default.
- W2280346314 modified "2023-10-12" @default.
- W2280346314 title "Identification of novel putative-binding proteins for cellular prion protein and a specific interaction with the STIP1 homology and U-Box-containing protein 1" @default.
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- W2280346314 doi "https://doi.org/10.1080/19336896.2015.1075347" @default.
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