Activity-based chemical proteomics uncovers unexpected covalent targets of E64d and reveals a role for cysteine cathepsins in PLD3 proteostasis
In neurons, treatment with E64d lead to about 50-fold PLD3 accumulation and dysregulation of its proteolytic cleavage, while there was only a minor overall change on the whole proteome level, which suggests that their activation might be responsible for decreased PLD3 levels in neurons of patients with Alzheimer’s diseases.