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- W2007245882 abstract "Abstract: Many cases of early-onset familial Alzheimer’s disease have been linked to mutations within two genes encoding the proteins presenilin-1 and presenilin-2. The presenilins are 48-56-kDa proteins that can be proteolytically cleaved to generate an N-terminal fragment (∼25-35 kDa) and a C-terminal fragment (∼17-20 kDa). The N- and C-terminal fragments of presenilin-1, but not full-length presenilin-1, were readily detected in both human and mouse cerebral cortex and in neuronal and glioma cell lines. In contrast, presenilin-2 was detected almost exclusively in cerebral cortex as the full-length molecule with a molecular mass of 56 kDa. The association of the presenilins with detergent-insoluble, low-density membrane microdomains, following the isolation of these structures from cerebral cortex by solubilization in Triton X-100 and subsequent sucrose density gradient centrifugation, was also examined. A minor fraction (10%) of both the N- and C-terminal fragments of presenilin-1 was associated with the detergent-insoluble, low-density membrane microdomains, whereas a considerably larger proportion of full-length presenilin-2 was present in the same membrane microdomains. In addition, a significant proportion of full-length presenilin-2 was present in a high-density, detergent-insoluble cytoskeletal pellet enriched in β-actin. The presence of the presenilins in detergent-insoluble, low-density membrane microdomains indicates a possible role for these specialized regions of the membrane in the lateral separation of Alzheimer’s disease-associated proteins within the lipid bilayer and/or in the distinct functions of these proteins." @default.
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- W2007245882 date "2001-12-25" @default.
- W2007245882 modified "2023-10-15" @default.
- W2007245882 title "Characterization of Detergent-Insoluble Complexes Containing the Familial Alzheimer’s Disease-Associated Presenilins" @default.
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- W2007245882 doi "https://doi.org/10.1046/j.1471-4159.1999.721534.x" @default.
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