Ribosomal Protein s15 Phosphorylation Mediates LRRK2 Neurodegeneration in Parkinson’s Disease
Open accessAbstract
Mutations in leucine-rich repeat kinase 2 (LRRK2) are a common cause of familial and sporadic Parkinson's disease (PD). Elevated LRRK2 kinase activity and neurodegeneration are linked, but the phosphosubstrate that connects LRRK2 kinase activity to neurodegeneration is not known. Here, we show that ribosomal protein s15 is a key pathogenic LRRK2 substrate in Drosophila and human neuron PD models. Phosphodeficient s15 carrying a threonine 136 to alanine substitution rescues dopamine neuron degeneration and age-related locomotor deficits in G2019S LRRK2 transgenic Drosophila and substantially reduces G2019S LRRK2-mediated neurite loss and cell death in human dopamine and cortical neurons. Remarkably, pathogenic LRRK2 stimulates both cap-dependent and cap-independent mRNA translation and induces a bulk increase in protein synthesis in Drosophila, which can be prevented by phosphodeficient T136A s15. These results reveal a novel mechanism of PD pathogenesis linked to elevated LRRK2 kinase activity and aberrant protein synthesis in vivo.
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Defects in mRNA translation are linked to autosomal dominant PD and autosomal recessive PD, where there is aberrant bulk protein synthesis coupled to neurodegeneration.
“Defects in mRNA translation are linked to autosomal dominant PD (5,6) and autosomal recessive PD (7), where there is aberrant bulk protein synthesis that is coupled to neurodegeneration (8,9).”
From Enhanced mTORC1 signaling and Protein Synthesis in Parkinson’s Disease Pathogenesis Disease Pathogenesis (2022) · cites this paper as [5]
This aberrant protein synthesis is in part mediated by dysregulation of LRRK2 phosphorylation of ribosomal proteins and PINK1 and parkin modulation of 4E-BP.
“This aberrant protein synthesis is, in part, mediated by dysregulation of LRRK2 phosphorylation of ribosomal proteins (5,6) and PTEN-induced kinase 1 (PINK1) and parkin modulation of eukaryotic initiation factor 4E (eIF4E)-binding protein (4E-BP) (7).”
From Enhanced mTORC1 signaling and Protein Synthesis in Parkinson’s Disease Pathogenesis Disease Pathogenesis (2022) · cites this paper as [5]
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- Authors
- Martin, I., Kim, J. W., Lee, B. D., Kang, H. C., Xu, J.-C., Jia, H., Stankowski, J., Kim, M.-S., Zhong, J., Kumar, M., Andrabi, S. A., Xiong, Y., Dickson, D. W., Wszolek, Z. K., Pandey, A., Dawson, T. M., & Dawson, V. L.
- Affiliations
- Johns Hopkins University (US)
- Mayo Clinic (US)
- Corresponding author
- Dawson, Ted M.
- Dawson, Valina L.
- ORCID
- Venue
- Cell
- Publisher
- Elsevier BV
- Published
- 2014-04
- Volume
- 157
- Issue
- 2
- Pages
- 472-485
- ISSN
- 0092-8674 (ISSN-L)
- PMC
- PMC4040530
- OpenAlex
- W2126238482
- Cited by
- 265
- References
- 3
- Citations by year
- 2026: 11 · 2025: 18 · 2024: 11 · 2023: 26 · 2022: 13 · 2021: 20 · 2020: 29 · 2019: 21 · 2018: 26 · 2017: 23 · 2016: 27 · 2015: 26 · 2014: 14
- FWCI
- 20.00
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Cell (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- AJOU Open Repository (Ajou University) (submittedVersion)
- Funders
- National Institute of Neurological Disorders and Stroke (P50NS038377, P50NS072187)
- Topics
- Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
- Health Sciences › Medicine › Neurology › Neurological disorders and treatments
- Keywords
- LRRK2, Parkinson's disease, ribosomal protein S15, phosphorylation, dopaminergic neuron loss, mRNA translation, protein synthesis, neurodegeneration, Drosophila model
- MeSH terms
- Leucine-Rich Repeat Serine-Threonine Protein Kinase-2, Amino Acid Sequence, Animals, Drosophila melanogaster, Humans, Molecular Sequence Data, Neurons, Parkinson Disease, Ribosomal Proteins, Protein Serine-Threonine Kinases
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