Published in:
Open Access
01-09-2013 | Poster presentation
Parkin acts as a transcription factor modulating presenilin-1 and presenilin-2 promoter transactivations
Authors:
Eric Duplan, Jean Sévalle, Julien Viotti, Thomas Goiran, Charlotte Bauer, Paul Renbaum, Ephrat Levy-Lahad, Clément A Gautier, Olga Corti, Nathalie Leroudier, Frédéric Checler, Cristine Alves da Costa
Published in:
Molecular Neurodegeneration
|
Special Issue 1/2013
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Excerpt
Parkin is associated to autosomal recessive early-onset Parkinson's disease. Parkin acts as an E3-ubiquitin ligase involved in the proteasome-mediated degradation of various substrates. It has been suggested that pathogenic mutations of parkin, abolishing its ubiquitin-ligase activity, could explain the accumulation of proteins and lead to neuronal death by apoptosis. However, besides this function, additional parkin-dependent cellular pathways exist. We demonstrated that parkin is a direct transcriptional repressor of the tumor suppressor p53 [
1]. p53 regulates the expression and functions of presenilin-1 (PS1) and presenilin-2 (PS2), two members of the gamma secretase complex involved in the production of the amyloid β peptide (Aβ) and parkin could control the homeostasis of intracellular Aβ. These findings prompted us to investigate whether parkin could control presenilins and if so, whether it is via a direct transcriptional control of PS promoters or indirectly, via p53. …