Abstract:The intramembrane protease PARL is a crucial mitochondrial safeguard by cleaving the mitophagy regulators PINK1 and PGAM5. PGAM5 substrate determinates have not been rigorously investigated and it is unclear how uncoupling the mitochondrial membrane potential regulates its processing inversely to PINK1. Here we show that in PGAM5 several hydrophilic residues distant from the cleavage site serve as key determinant for PARL- catalyzed cleavage. NMR analysis indicates that a short N-terminal amphipathic helix, fo… Show more
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