Pen-2 is essential for γ-secretase complex stability and trafficking but partially dispensable for endoproteolysis.

Abstract excerpt

The 19-transmembrane γ-secretase complex generates the amyloid β-peptide of Alzheimer's disease by intramembrane proteolysis of the β-amyloid precursor protein. This complex is comprised of presenilin, Aph1, nicastrin, and Pen-2. The exact function and mechanism of the highly conserved Pen-2 subunit remain poorly understood. Using systematic mutagenesis, we confirm and extend our understanding of which key...

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