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Regulation of parkin and PINK1 by neddylation.

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.

Pubmed ID: 22388932

Authors

  • Choo YS
  • Vogler G
  • Wang D
  • Kalvakuri S
  • Iliuk A
  • Tao WA
  • Bodmer R
  • Zhang Z

Journal

Human molecular genetics

Publication Data

June 1, 2012

Associated Grants

  • Agency: NIEHS NIH HHS, Id: P01ES016738
  • Agency: NCI NIH HHS, Id: P30 CA030199
  • Agency: NINDS NIH HHS, Id: R01NS057289

Mesh Terms

  • Animals
  • Cells, Cultured
  • Dopaminergic Neurons
  • Drosophila
  • Drosophila Proteins
  • Humans
  • Immunohistochemistry
  • Lewy Bodies
  • Mesencephalon
  • Parkinson Disease
  • Protein Processing, Post-Translational
  • Protein-Serine-Threonine Kinases
  • RNA Interference
  • Transfection
  • Ubiquitin
  • Ubiquitin-Protein Ligases