PINK1

PINK1 Full Name

PTEN induced putative kinase 1

PINK1 Introduction

PINK1 (PTEN-induced putative kinase 1) is a mitochondrial serine/threonine-protein kinase that functions as a critical sensor of mitochondrial integrity. Under normal physiological conditions, PINK1 is imported into healthy mitochondria via the TOM/TIM complexes and rapidly degraded. However, when mitochondrial membrane potential is lost, PINK1 accumulates on the outer mitochondrial membrane, where it phosphorylates ubiquitin and recruits the E3 ubiquitin ligase Parkin, initiating mitophagy to selectively remove damaged mitochondria. This quality control mechanism is especially crucial in high-energy demanding cells such as dopaminergic neurons, which rely on efficient mitochondrial turnover to sustain their complex axonal networks.

Functionally, PINK1 acts as a master regulator of mitochondrial autophagy and cellular defense against oxidative stress. By phosphorylating key mitochondrial substrates such as TRAP1 and HtrA2/OMI, PINK1 protects cells from apoptosis triggered by reactive oxygen species (ROS) accumulation. Loss-of-function mutations in PINK1 disrupt this protective signaling cascade, resulting in impaired mitophagy, accumulation of dysfunctional mitochondria, and elevated oxidative stress, which are central molecular mechanisms underlying early-onset Parkinson's disease (PD). Pharmacological and lifestyle interventions that enhance PINK1-Parkin pathway activity—such as urolithin A supplementation, NAD+ precursors, exercise, or caloric restriction—have shown promise in restoring mitochondrial homeostasis and neuroprotection in preclinical models.

Clinically, PINK1 mutations are strongly linked to familial forms of early-onset Parkinson's disease. Most pathogenic variants localize to its kinase domain, including missense mutations (G309D, L347P) and truncating mutations (W437X), which abolish kinase activity and mitophagy induction. Beyond genetic disorders, reduced PINK1 expression is observed during normal aging and under metabolic stress, exacerbating mitochondrial dysfunction, α-synuclein aggregation, and dopaminergic neurodegeneration. These findings highlight PINK1 not only as a pivotal target for therapeutic intervention in PD but also as a key regulator in aging-related mitochondrial maintenance, making it a focus of ongoing research in neuroprotection and anti-aging strategies.

Alternate Names for PINK1

PINK1; PTEN induced putative kinase 1; PARK6, Parkinson disease (autosomal recessive) 6; serine/threonine-protein kinase PINK1, mitochondrial; protein kinase BRPK; PTEN-induced putative kinase protein 1; BRPK; PARK6; FLJ27236;

• Neurologic Diseases Catalogue
• Neurologic Diseases Catalogue

• 1.Shan W, et al.; Targeting mitochondrial autophagy for anti-aging. Cell Death Discov. 2025, 12(1):78.
  2.Lin Y, Wen DT. Pink1 at the crossroads of aging, exercise, and diet in Parkinson's disease: a mechanistic review. Front Aging Neurosci. 2026, 18:1738559.