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Updated: Feb 17, 2026

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag
08:55

Rab10 Phosphorylation Detection by LRRK2 Activity Using SDS-PAGE with a Phosphate-binding Tag

Published on: December 14, 2017

16.2K

Rab29 activation of the Parkinson's disease-associated LRRK2 kinase

Elena Purlyte1, Herschel S Dhekne2, Adil R Sarhan1

  • 1MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, UK.

The EMBO Journal
|December 8, 2017
PubMed

Insights

Rab29 protein recruits and activates LRRK2 kinase, a key factor in Parkinson's disease pathogenesis. This interaction at the Golgi apparatus is crucial for LRRK2 activity and biomarker phosphorylation.

Area of Science:

  • Molecular Biology
  • Neuroscience
  • Cell Biology

Background:

  • Mutations in LRRK2 (Leucine-rich repeat kinase 2) are linked to Parkinson's disease.
  • LRRK2 phosphorylates Rab GTPase proteins, including Rab29.
  • Rab29 is located in the PARK16 locus, associated with Parkinson's disease.

Purpose of the Study:

  • To investigate the role of Rab29 in regulating LRRK2 kinase activity and localization.
  • To elucidate the mechanism by which Rab29 influences LRRK2 in Parkinson's disease.

Main Methods:

  • Cellular localization studies using Golgi markers.
  • Kinase activity assays for LRRK2.
  • Site-directed mutagenesis of LRRK2.
  • Rab29 knockout studies in A549 cells.
  • Analysis of LRRK2 biomarker phosphorylation sites.

Main Results:

  • Rab29 recruits LRRK2 to the trans-Golgi network, significantly enhancing its kinase activity.
  • Pathogenic LRRK2 mutants (R1441G/C, Y1699C) are more efficiently recruited and activated by Rab29.
  • Conserved residues in the LRRK2 ankyrin domain are essential for Rab29-mediated Golgi recruitment and activation.
  • Rab29 knockout reduces LRRK2-mediated phosphorylation of Rab10.
  • Mutations affecting LRRK2-Rab29 or LRRK2-GTP interaction inhibit phosphorylation of key biomarker sites (Ser910, Ser935, Ser955, Ser973).

Conclusions:

  • Rab29 acts as a master regulator of LRRK2.
  • Rab29 controls LRRK2 activation, subcellular localization, and biomarker phosphorylation.
  • This interaction is a potential therapeutic target for Parkinson's disease.
Keywords:
GTPaseGolgiPARK genesRab10phosphorylation

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