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LRRK2 functions as a Wnt signaling scaffold, bridging cytosolic proteins and membrane-localized LRP6

Berwick, DC; Harvey, K; (2012) LRRK2 functions as a Wnt signaling scaffold, bridging cytosolic proteins and membrane-localized LRP6. Human Molecular Genetics , 21 (22) 4966 -4979. 10.1093/hmg/dds342. Green open access

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Abstract

Mutations in PARK8, encoding leucine-rich repeat kinase 2 (LRRK2), are a frequent cause of Parkinson's disease (PD). Nonetheless, the physiological role of LRRK2 remains unclear. Here, we demonstrate that LRRK2 participates in canonical Wnt signaling as a scaffold. LRRK2 interacts with key Wnt signaling proteins of the β-catenin destruction complex and dishevelled proteins in vivo and is recruited to membranes following Wnt stimulation, where it binds to the Wnt co-receptor low-density lipoprotein receptor-related protein 6 (LRP6) in cellular models. LRRK2, therefore, bridges membrane and cytosolic components of Wnt signaling. Changes in LRRK2 expression affects pathway activity, while pathogenic LRRK2 mutants reduce both signal strength and the LRRK2-LRP6 interaction. Thus, decreased LRRK2-mediated Wnt signaling caused by reduced binding to LRP6 may underlie the neurodegeneration observed in PD. Finally, a newly developed LRRK2 kinase inhibitor disrupted Wnt signaling to a similar extent as pathogenic LRRK2 mutations. The use of LRRK2 kinase inhibition to treat PD may therefore need reconsideration.

Type: Article
Title: LRRK2 functions as a Wnt signaling scaffold, bridging cytosolic proteins and membrane-localized LRP6
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/hmg/dds342
Publisher version: http://dx.doi.org/10.1093/hmg/dds342
Language: English
Additional information: © The Author 2012. Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. PMCID: PMC3709196
Keywords: Adaptor proteins, Signal transducing, Axin signaling complex, Cell line, Cell membrane, Cytosol, Humans, Ligands, Low density lipoprotein receptor-relatedprotein-6, Models, Biological, Mutation, Phosphoproteins, Protein binding, Protein transport, Protein-serine-threonine kinases, Wnt Proteins, Wnt signaling pathway
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy > Pharmacology
URI: https://discovery.ucl.ac.uk/id/eprint/1367122
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