Parkin overexpression 293T lysate (whole cell)

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

The Parkin protein also known as PRK8 or Park2 is an E3 ubiquitin ligase with a molecular weight of approximately 52 kDa. This protein plays a critical role in tagging damaged proteins for degradation maintaining cellular health. Parkin is expressed in various tissues with significant levels in dopaminergic neurons in the brain. It is encoded by the PARK2 gene and has been linked to the regulation of mitochondrial quality and autophagy processes contributing to cellular homeostasis.

Biological function summary

Parkin is essential for the regulation of mitochondria through its involvement in the mitochondrial quality control system. It functions as part of a complex with other proteins that respond to mitochondrial damage by tagging them with ubiquitin molecules. This mechanism allows for the removal of defective mitochondria via mitophagy critical for preventing the accumulation of damaged cellular components.

Pathways

Parkin interacts with pathways involved in the cellular stress response particularly the PINK1 (PTEN Induced Kinase

1. pathway. PINK1 phosphorylates Parkin activating it to label damaged mitochondria. Another critical pathway involves proteasomal degradation where Parkin collaborates with Ubiquitin to manage protein turnover. These pathways highlight its relationships with other cellular stress-regulating proteins enhancing our understanding of its roles in maintaining cellular integrity.

Mutations in the gene coding for Parkin are linked to Parkinson's disease (PD) and some forms of juvenile autosomal recessive parkinsonism. The Parkin protein's dysfunctional activity leads to impaired mitochondrial management and protein aggregation in neurons contributing significantly to neurodegenerative disease. In conditions such as PD Parkin interacts with other proteins such as PINK1 reinforcing its role in mitochondrial protection and indicating the protein's importance in disease progression and potential therapeutic targeting.