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A TRAPPC6B splicing variant associates to restless legs syndrome.

Parkinsonism Relat Disord. 2016 Aug 18. pii: S1353-8020(16)30320-0. doi: 10.1016/j.parkreldis.2016.08.016. [Epub ahead of print]

Authors/Editors: Aridon P, De Fusco M, Winkelmann JW, Zucconi M, Arnao V, Ferini-Strambi L, Casari G.
Publication Date: 2016

2016_10_aridon


Abstract

Introduction:
RLS is a common movement disorders with a strong genetic component in its pathophysiology, but, up to now, no causative mutation has been reported.
Methods:
We re-evaluated the previously described RLS2 family by exome sequencing.
Results:
We identified fifteen variations in the 14q critical region. The c.485G > A transition of the TRAPPC6B genesegregates with the RLS2 haplotype, is absent in 200 local controls and is extremely rare in 12988 exomes from the Exome Variant Server (EVS). This variant alters a splicing site and hampers the normal transcript processing by promoting exon 3-skipping as demonstrated by minigene transfection and by patient transcripts.
Conclusions:
We identified a TRAPPC6B gene mutation associated to the RLS locus on chromosome 14.

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