TITLE

Novel TOR1A mutation p.Arg288Gln in early-onset dystonia (DYT1)

AUTHOR(S)
Zirn, B.; Grundmann, K.; Huppke, P.; Puthenparapil, J.; Wolburg, H.; Riess, O.; Müller, U.
PUB. DATE
December 2008
SOURCE
Journal of Neurology, Neurosurgery & Psychiatry;Dec2008, Vol. 79 Issue 12, p1327
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The three-nucleotide deletion, ΔGAG (within the gene TORIA), is the only proven cause of childhood-onset dystonia (DYT1). A potentially pathogenic role of additional sequence changes within TOR1A has not been conclusively shown. DNA sequencing of exon 5 of TOR1A in a patient with DYT1. Detection of sequence change c.863G>A in exon 5 of TOR1A in the patient. The G>A transition results in an exchange of an arginine for glutamine (p.Arg288Gln) in subdomain α5 of TOR1A. Several findings point to a potentially pathogenic role of the sequence change in the patient: The base change is absent in 1000 control chromosomes; an Arg at position 288 of TOR1A has been conserved throughout vertebrate evolution, indicating an important role of Arg288 in TOR1A function; functional studies demonstrate enlarged perinuclear space in HEK293 cells overexpressing TORIA with the p.Arg288Gln mutation. The same morphological changes are observed in cells overexpressing the common ΔGAG TOR1A mutation but not in cells overexpressing wild-type TOR1A. The sequence change described here may be a novel pathogenic mutation of TOR1A in DYT1.
ACCESSION #
35760357

 

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