Versatile members of the DNAJ family show Hsp70 dependent anti-aggregation activity on RING1 mutant parkin C289G

Vaishali Kakkar, E. F. Elsiena Kuiper, Abhinav Pandey, Ineke Braakman, Harm H. Kampinga*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)
240 Downloads (Pure)

Abstract

Parkinson's disease is one of the most common neurodegenerative disorders and several mutations in different genes have been identified to contribute to the disease. A loss of function parkin RING1 domain mutant (C289G) is associated with autosomal-recessive juvenile-onset Parkinsonism (AR-JP) and displays altered solubility and sequesters into aggregates. Single overexpression of almost each individual member of the Hsp40 (DNAJ) family of chaperones efficiently reduces parkin C289G aggregation and requires interaction with and activity of endogenously expressed Hsp70 s. For DNAJB6 and DNAJB8, potent suppressors of aggregation of polyglutamine proteins for which they rely mainly on an S/T-rich region, it was found that the S/T-rich region was dispensable for suppression of parkin C289G aggregation. Our data implies that different disease-causing proteins pose different challenges to the protein homeostasis system and that DNAJB6 and DNAJB8 are highly versatile members of the DNAJ protein family with multiple partially non-overlapping modes of action with respect to handling disease-causing proteins, making them interesting potential therapeutic targets.

Original languageEnglish
Article number34830
Number of pages12
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 7-Oct-2016

Keywords

  • ALPHA-SYNUCLEIN AGGREGATION
  • POLYGLUTAMINE PEPTIDES
  • MOLECULAR CHAPERONES
  • PROTEIN AGGREGATION
  • DISTINCT FUNCTIONS
  • AMYLOID FORMATION
  • DISEASE
  • MUTATIONS
  • UBIQUITIN
  • CELLS

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