PARK7 (also known as DJ-1) is a multifunctional protein encoded by the PARK7 gene that plays critical roles in cellular protection against oxidative stress, mitochondrial homeostasis, and neuroprotection[1][2]. Mutations in PARK7 cause autosomal recessive early-onset Parkinson's disease (PD), making it one of the key genetic determinants of familial PD[3].
The PARK7 gene is located on chromosome 1p36.22 and encodes a 189-amino acid protein belonging to the DJ-1 Thioredoxinx family[1:1]. DJ-1 is highly conserved across species and is expressed ubiquitously in the brain, with particularly high levels in astrocytes and neurons[4].
DJ-1 acts as a potent antioxidant by:
DJ-1 exhibits several unique biochemical characteristics:
Oxidative modification:
DJ-1 supports mitochondrial integrity through:
DJ-1 loss leads to:
DJ-1 participates in cellular protein homeostasis:
In neurodegeneration:
PARK7 mutations causing early-onset PD:
DJ-1 as a biomarker:
Therapeutic approaches:
Pathogenic PARK7 mutations (including p.L166P, p.E64D, and p.M26I) cause loss of DJ-1 function, leading to:
PARK7 mutations cause:
DJ-1 levels in cerebrospinal fluid show promise as a Parkinson's disease biomarker[19].
This section links to atlas resources relevant to DJ-1/PARK7 protein.
Bonifati, V., et al. (2003). Mutations in the DJ-1 gene associated with autosomal recessive early-onset parkinsonism. Science. 2003. ↩︎ ↩︎
Miyamura, S., et al. (2020). DJ-1 protects against glyoxal-mediated damages. Neurobiology of Aging. 2020. ↩︎ ↩︎ ↩︎
Hague, S., et al. (2003). Early-onset parkinsonism caused by recessive mutations in the PARK7 gene. Neurology. 2003. ↩︎ ↩︎
Bandopadhyay, R., et al. (2004). The expression of DJ-1 (PARK7) in normal human CNS and in Parkinson's disease. Brain Research. 2004. ↩︎
Wilson, M.A. (2011). The role of cysteine oxidation in DJ-1 function and dysfunction. Antioxidants & Redox Signaling. 2011. ↩︎
Wu, J., et al. (2018). Structural basis of dimer formation of human DJ-1. Journal of Molecular Biology. 2018. ↩︎
Yokota, T., et al. (2003). Damaged DNA binding protein 2 in oxidative stress signaling. Cell. 2003. ↩︎
Clements, C.M., et al. (2006). DJ-1, a cancer- and Parkinson's disease-associated protein, stabilizes the antioxidant transcriptional master regulator Nrf2. Proceedings of the National Academy of Sciences. 2006. ↩︎ ↩︎
Gu, H., et al. (2020). DJ-1 maintains mitochondrial complex I activity to prevent age-related decline. Neurobiology of Aging. 2020. ↩︎ ↩︎
Zhou, M., et al. (2021). DJ-1 promotes mitochondrial biogenesis via PGC-1α pathway. Mitochondrion. 2021. ↩︎
Joshi, V., et al. (2019). Interaction of DJ-1 with Parkin regulates mitophagy. Neurobiology of Aging. 2019. ↩︎
Shendelman, S., et al. (2004). DJ-1 as a molecular chaperone. Molecular Biology of the Cell. 2004. ↩︎
Zhou, W., & Freed, C.R. (2005). DJ-1 upregulates glutathione synthesis. Journal of Biological Chemistry. 2005. ↩︎
Kim, R.H., et al. (2005). Hypersensitivity of DJ-1-deficient mice to oxidative stress. Proceedings of the National Academy of Sciences. 2005. ↩︎
Meulener, M., et al. (2005). Drosophila DJ-1 mutants are sensitive to oxidative stress. Current Biology. 2005. ↩︎
Annesi, G., et al. (2005). PARK7 mutations in early-onset Parkinson's disease. Brain. 2005. ↩︎
Inden, M., et al. (2007). Neuroprotective effect of AAV-PARK7. Neurochemistry International. 2007. ↩︎
Miyazaki, S., et al. (2022). Small molecule activators of DJ-1 function. Bioorganic & Medicinal Chemistry Letters. 2022. ↩︎
Hong, Z., et al. (2010). DJ-1 in cerebrospinal fluid as a biomarker for Parkinson's disease. Neurology. 2010. ↩︎