AI Article Synopsis
- Neddylation is a modification that attaches a small molecule called NEDD8 to proteins, influencing their function, and it's important for understanding Parkinson's disease.
- Researchers found that the proteins parkin and PINK1, which are linked to Parkinson's, undergo neddylation, enhancing parkin's activity and stabilizing a specific PINK1 fragment.
- The study suggests that issues with neddylation of parkin and PINK1 may play a role in developing Parkinson's disease, as shown by the presence of NEDD8 in the brains of affected individuals.
Article Abstract
Neddylation is a posttranslational modification that plays important roles in regulating protein structure and function by covalently conjugating NEDD8, an ubiquitin-like small molecule, to the substrate. Here, we report that Parkinson's disease (PD)-related parkin and PINK1 are NEDD8 conjugated. Neddylation of parkin and PINK1 results in increased E3 ligase activity of parkin and selective stabilization of the 55 kDa PINK1 fragment. Expression of dAPP-BP1, a NEDD8 activation enzyme subunit, in Drosophila suppresses abnormalities induced by dPINK1 RNAi. PD neurotoxin MPP(+) inhibits neddylation of both parkin and PINK1. NEDD8 immunoreactivity is associated with Lewy bodies in midbrain dopaminergic neurons of PD patients. Together, these results suggest that parkin and PINK1 are regulated by neddylation and that impaired NEDD8 modification of these proteins likely contributes to PD pathogenesis.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3349425 | PMC |
| http://dx.doi.org/10.1093/hmg/dds070 | DOI Listing |
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