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Updated: Aug 10, 2025

Assaying the Kinase Activity of LRRK2 in vitro
06:09

Assaying the Kinase Activity of LRRK2 in vitro

Published on: January 18, 2012

22.6K

Protein kinase C showcases allosteric control: activation of LRRK1

Hannah Tovell1, Alexandra C Newton1

  • 1Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, U.S.A.

The Biochemical Journal
|February 10, 2023
PubMed

Insights

Protein kinase C allosterically activates leucine-rich repeat kinase 1 (LRRK1) by phosphorylating its GTPase domain. This inter-domain regulation fine-tunes LRRK1 activity, impacting cellular signaling pathways.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Signaling

Background:

  • Protein kinases are crucial enzymes regulating cellular processes through phosphorylation.
  • Allosteric regulation allows for rapid and precise control of enzyme activity.
  • Protein Kinase C (PKC) is a well-studied example of a multi-domain kinase regulated by conformational changes.

Purpose of the Study:

  • To investigate the regulatory relationship between Protein Kinase C (PKC) and Leucine-rich repeat kinase 1 (LRRK1).
  • To elucidate the mechanism by which PKC influences LRRK1 activity.
  • To explore the role of allosteric regulation in multi-domain kinase signaling.

Main Methods:

  • Investigated the phosphorylation sites of LRRK1 by PKC.
  • Utilized biochemical assays to assess the impact of phosphorylation on LRRK1 activity.
  • Examined the role of the CORB GTPase domain in mediating allosteric activation.

Main Results:

  • Protein Kinase C (PKC) phosphorylates Leucine-rich repeat kinase 1 (LRRK1) at specific sites within its CORB GTPase domain.
  • This phosphorylation event leads to the allosteric activation of LRRK1.
  • The findings reveal a novel layer of regulation in the LRRK1 signaling pathway.

Conclusions:

  • PKC acts as an upstream regulator of LRRK1, controlling its activity through allosteric mechanisms.
  • The phosphorylation of the CORB GTPase domain is critical for LRRK1 activation.
  • This study highlights the intricate cross-regulation between multi-domain kinases.

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