Phosphatase and tensin homolog (PTEN)-induced kinase 1 (PINK1), a serine/threonine kinase mainly localized to mitochondria, has attracted more and more attention since its mutation was identified in hereditary early-onset Parkinson’s disease (PD) (Valente et al., 2004; Rasool and Trempe, 2018). The gene discussed is MARK2; the disease is Parkinson disease.