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- W4214824333 abstract "The amyloid precursor protein (APP) is a ubiquitously expressed type 1 transmembrane protein mostly known for serving as a precursor to the amyloid-β peptide (Aβ), a culprit in Alzheimer disease (AD). However, APP also has important physiological functions by being implicated in, for instance, adhesion, signaling, neuronal development, and synaptic function. Human APP contains 2 N-glycosylation sites, at asparagine (N) 467 (N467) and N496. Here, we studied the role of N-glycosylation on APP trafficking and processing by constructing APP-SNAP plasmid vectors for wildtype APP and N-glycosylation site mutants in which N467 or N496 was replaced by glutamine (Q) and expressed these in HEK293T cells. Lack of either of the 2 N-glycans resulted in a reduction in the size of intracellular APP-SNAP-positive vesicles and a reduction of APP-SNAP in the plasma membrane and lysosomes. Importantly, loss of either of the 2 N-glycans resulted in elevated levels of intracellular as well as secreted Aβ42. These data suggest that N-glycans have a major impact on trafficking and processing of APP and could play an important role in the development of AD." @default.
- W4214824333 created "2022-03-05" @default.
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- W4214824333 date "2022-03-10" @default.
- W4214824333 modified "2023-10-14" @default.
- W4214824333 title "Lack of N-glycosylation increases amyloidogenic processing of the amyloid precursor protein" @default.
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- W4214824333 doi "https://doi.org/10.1093/glycob/cwac009" @default.
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