TY - JOUR
T1 - Parkin disrupts the α-synuclein/dopamine transporter interaction
T2 - Consequences toward dopamine-induced toxicity
AU - Moszczynska, Anna
AU - Saleh, Jumana
AU - Zhang, Hongyu
AU - Vukusic, Brian
AU - Lee, Frank J.S.
AU - Liu, Fang
N1 - Funding Information:
Acknowledgements We thank S. W. Zou for technical assistance. A. M. is a recipient of Parkinson Society Canada fellowship. F. J. S. L. is a recipient of a Parkinson Society Canada fellowship and NARSAD Young Investigator award. F. L. is a recipient of McDonald Scholarship of the Heart and Stroke Foundation of Canada. The work is supported by the Canadian Institutes of Health Research (F. L.).
PY - 2007/7
Y1 - 2007/7
N2 - Parkinson's disease is characterized by progressive neuronal degeneration of dopaminergic neurons in the substantia nigra. Many factors are thought to contribute to the neuronal cell death that occurs in Parkinson's disease, including α-synuclein-mediated toxicity. Previously, we have reported that α-synuclein directly couples to the carboxyl tail of the dopamine transporter (DAT) and that the α-synuclein/DAT protein complex formation accelerates DAT-mediated cellular dopamine (DA) uptake and DA-induced cellular apoptosis. In the present study, we report that parkin, an E2-dependent E3 protein ubiquitin ligase associated with recessive early onset Parkinson's disease, exerts a protective effect against DA-induced α-synuclein- dependent cell toxicity. Parkin impairs the α-synuclein/DAT coupling by interacting with the carboxyl-terminus of the DAT and blocks the α-synuclein-induced enhancement in both DAT cell surface expression and DAT-mediated DA uptake. Moreover, we have found that parkin protects against DA-induced cell toxicity in dopaminergic SK-N-SH cells. These findings will help identify the role of these proteins in the etiology and/or maintenance of Parkinson's disease.
AB - Parkinson's disease is characterized by progressive neuronal degeneration of dopaminergic neurons in the substantia nigra. Many factors are thought to contribute to the neuronal cell death that occurs in Parkinson's disease, including α-synuclein-mediated toxicity. Previously, we have reported that α-synuclein directly couples to the carboxyl tail of the dopamine transporter (DAT) and that the α-synuclein/DAT protein complex formation accelerates DAT-mediated cellular dopamine (DA) uptake and DA-induced cellular apoptosis. In the present study, we report that parkin, an E2-dependent E3 protein ubiquitin ligase associated with recessive early onset Parkinson's disease, exerts a protective effect against DA-induced α-synuclein- dependent cell toxicity. Parkin impairs the α-synuclein/DAT coupling by interacting with the carboxyl-terminus of the DAT and blocks the α-synuclein-induced enhancement in both DAT cell surface expression and DAT-mediated DA uptake. Moreover, we have found that parkin protects against DA-induced cell toxicity in dopaminergic SK-N-SH cells. These findings will help identify the role of these proteins in the etiology and/or maintenance of Parkinson's disease.
KW - Dopamine toxicity
KW - Dopamine transporter
KW - Parkin
KW - Parkinson's disease
KW - Protein/Protein interactions
KW - α-Synuclein toxicity
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U2 - 10.1007/s12031-007-0037-0
DO - 10.1007/s12031-007-0037-0
M3 - Article
C2 - 17873367
AN - SCOPUS:35348816727
SN - 0895-8696
VL - 32
SP - 217
EP - 227
JO - Journal of Molecular Neuroscience
JF - Journal of Molecular Neuroscience
IS - 3
ER -