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Mutation screening of the ubiquitin ligase gene RNF135 in French patients with autism

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Many genes are now thought to confer susceptibility to autism. Despite the fact that this neuropsychiatric disease appears to be related to several different causes, common cellular and molecular pathways have emerged and point to synaptic dysfunction or cellular growth. Several studies have indicated the importance of the ubiquitin pathway in synaptic function and the aetiology of autism. Here, we focused on the ring finger protein 135 (RNF135) gene, encoding an E3 ubiquitin ligase expressed in the cortex and cerebellum, and located in the NF1 gene locus in 17q11.2, a region linked to autism. We carried out a genetic analysis of the coding sequence of RFN135 in a French cohort of patients with autism and observed a significantly increased frequency of genotypes carrying the rare allele of the rs111902263 (p.R115K) missense variant in patients (P=0.0019, odds ratio: 4.23, 95% confidence interval: 1.87–9.57). Particularly, three unrelated patients showed a homozygous genotype for K115, a situation not observed in the 1812 control individuals. Further cellular and molecular studies are required to elucidate the role of this gene and the variant K115 in brain development and neuronal function.
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Keywords: E3 ligase; autistic spectrum disorder; ring finger protein 135; ubiquitin

Document Type: Research Article

Affiliations: 1: UMR INSERM U930, University François-Rabelais 2: CHRU Tours, Department of Pedopsychiatry 3: CNRS UPR 4301, CBM, Orléans

Publication date: December 1, 2015

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