Figure 3.
Mitophagy is activated by changes in mitochondrial membrane potential (Δ ψ m). Loss of Δ ψ m leads to accumulation of PINK1 and subsequent translocation of Parkin to mitochondria. Parkin ubiquitinates proteins in the outer mitochondrial membrane. The ubiquitin serves as a marker for autophagosomes to degrade these mitochondria.