Alzheimer disease (AD) research, because not only amyloid β (Aβ) peptide, but also cellular
or mitochondrial APP are intimately involved in cellular dysfunction and AD pathogenesis.
Here we demonstrate that APP is directly and efficiently cleaved by the HtrA2 serine
protease in vitro and in vivo. Using several APP mutants and N-terminal amino acid
sequencing, we identified that the HtrA2-mediated APP cleavage product is the C161 …