Abstract
Mutations in Leucine Rich Repeat Kinase 2 (LRRK2) are the leading genetic cause of Parkinson's disease (PD). LRRK2 is predicted to contain kinase and GTPase enzymatic domains, with recent evidence suggesting that the kinase activity of LRRK2 is central to the pathogenic process associated with this protein. The GTPase domain of LRRK2 plays an important role in the regulation of kinase activity. To investigate how the GTPase domain might be related to disease, we examined the GTP binding and hydrolysis properties of wild type and a mutant form of LRRK2. We show that LRRK2 immunoprecipitated from cells has a detectable GTPase activity that is disrupted by a familial mutation associated with PD located within the GTPase domain, R1441C.
Publication types
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Research Support, N.I.H., Intramural
MeSH terms
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Amino Acid Substitution
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Animals
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COS Cells
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Chlorocebus aethiops
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GTP Phosphohydrolases / genetics
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GTP Phosphohydrolases / metabolism
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Guanosine Diphosphate / metabolism
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Guanosine Triphosphate / metabolism*
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Humans
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Hydrolysis
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Immunoblotting
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Immunoprecipitation
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Kinetics
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Leucine-Rich Repeat Serine-Threonine Protein Kinase-2
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Mutation*
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Parkinson Disease / enzymology
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Parkinson Disease / genetics
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Protein Binding
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Protein Serine-Threonine Kinases / genetics
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Protein Serine-Threonine Kinases / metabolism*
Substances
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Guanosine Diphosphate
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Guanosine Triphosphate
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LRRK2 protein, human
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Leucine-Rich Repeat Serine-Threonine Protein Kinase-2
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Protein Serine-Threonine Kinases
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GTP Phosphohydrolases