Title : Prion protein facilitates retinal iron uptake and is cleaved at the β-site: Implications for retinal iron homeostasis in prion disorders.

Pub. Date : 2017 Aug 29

PMID : 28851903






4 Functional Relationships(s)
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Protein Name
Organism
1 PrPC is expressed on the basolateral membrane of retinal-pigment-epithelial (RPE) cells, where it mediates uptake of iron by the neuroretina. Iron prion protein Mus musculus
2 Accordingly, the neuroretina of PrP-knock-out mice is iron-deficient. Iron prion protein Mus musculus
3 In RPE19 cells, silencing of PrPC decreases ferritin while over-expression upregulates ferritin and divalent-metal-transporter-1 (DMT-1), indicating PrPC-mediated iron uptake through DMT-1. Iron prion protein Mus musculus
4 Polarization of RPE19 cells results in upregulation of ferritin by ~10-fold and beta-cleavage of PrPC, the latter likely to block further uptake of iron due to cleavage of the ferrireductase domain. Iron prion protein Mus musculus