Cited by 115Parkinson's Disease Mechanisms and TreatmentsNeurological disorders and treatmentsNuclear Receptors and Signaling

Serine 129 Phosphorylation Reduces the Ability of α-Synuclein to Regulate Tyrosine Hydroxylase and Protein Phosphatase 2A in Vitro and in Vivo

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Lou, Haiyan, Montoya, Susana E., Alerte, Tshianda N.M., Wang, Jian, Wu, Jianjun, Peng, Xiangmin, Hong, Chang-Sook, Friedrich, Emily E. +7 more·2010·Journal of Biological Chemistry

Abstract

Alpha-synuclein (a-Syn), a protein implicated in Parkinson disease, contributes significantly to dopamine metabolism. a-Syn binding inhibits the activity of tyrosine hydroxylase (TH), the rate-limiting enzyme in catecholamine synthesis. Phosphorylation of TH stimulates its activity, an effect that is reversed by protein phosphatase 2A (PP2A). In cells, a-Syn overexpression activates PP2A. Here we demonstrate that a-Syn significantly inhibited TH activity in vitro and in vivo and that phosphorylation of a-Syn serine 129 (Ser-129) modulated this effect. In MN9D cells, a-Syn overexpression reduced TH serine 19 phosphorylation (Ser(P)-19). In dopaminergic tissues from mice overexpressing human a-Syn in catecholamine neurons only, TH-Ser-19 and TH-Ser-40 phosphorylation and activity were also reduced, whereas PP2A was more active. Cerebellum, which lacks excess a-Syn, had PP2A activity identical to controls. Conversely, a-Syn knock-out mice had elevated TH-Ser-19 phosphorylation and activity and less active PP2A in dopaminergic tissues. Using an a-Syn Ser-129 dephosphorylation mimic, with serine mutated to alanine, TH was more inhibited, whereas PP2A was more active in vitro and in vivo. Phosphorylation of a-Syn Ser-129 by Polo-like-kinase 2 in vitro reduced the ability of a-Syn to inhibit TH or activate PP2A, identifying a novel regulatory role for Ser-129 on a-Syn. These findings extend our understanding of normal a-Syn biology and have implications for the dopamine dysfunction of Parkinson disease.

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  1. [35]Chartier-Harlin M. C. Kachergus J. Roumier C. Mouroux V. Douay X. Lincoln S. Levecque C. Larvor L. Andrieux J. Hulihan M. Waucquier N. Defebvre L. Amouyel P. Farrer M. Destée A (2004) Lancet 364, 1167– 1169 15451224

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Authors
Lou, H., Montoya, S. E., Alerte, T. N. M., Wang, J., Wu, J., Peng, X., Hong, C.-S., Friedrich, E. E., Mader, S. A., Pedersen, C. J., Marcus, B. S., McCormack, A. L., Di Monte, D. A., Daubner, S. C., & Perez, R. G.
Affiliations
  • Shandong University (CN)
  • University of Pittsburgh (US)
  • Parkinson's Institute and Clinical Center (US)
  • St. Mary's University, Texas (US)
Corresponding author
Perez, Ruth G.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2010-06
Volume
285
Issue
23
Pages
17648-17661
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2084965902
Cited by
115
References
109
Citations by year
2026: 4 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 11 · 2021: 6 · 2020: 7 · 2019: 7 · 2018: 8 · 2017: 9 · 2016: 7 · 2015: 8 · 2014: 10 · 2013: 11 · 2012: 13
FWCI
6.28
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (GM-47291, R01GM047291)
  • National Institute of Neurological Disorders and Stroke (NS42094, R01NS042094)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
alpha-synuclein, serine 129 phosphorylation, tyrosine hydroxylase, protein phosphatase 2A, Parkinson's disease, dopamine metabolism, catecholamine synthesis, PLK2, dopaminergic neurons, enzyme regulation, phosphorylation
MeSH terms
Animals, Dopamine, Humans, Mice, Transgenic, Parkinson Disease, Phosphorylation, Serine, Tyrosine, Tyrosine 3-Monooxygenase, Lentivirus, Mutagenesis, Neurotransmitter Agents, Mice, alpha-Synuclein, Protein Phosphatase 2, In Vitro Techniques

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