Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Screening and cell-based assessment of mutations in the Aristaless-related homeobox (ARX) gene
Author: Fullston, T.
Finnis, M.
Hackett, A.
Hodgson, B.
Brueton, L.
Baynam, G.
Norman, A.
Reish, O.
Shoubridge, C.
Gecz, J.
Citation: Clinical Genetics: an international journal of genetics and molecular medicine, 2011; 80(6):510-522
Publisher: Wiley-Blackwell Publishing Inc
Issue Date: 2011
ISSN: 1399-0004
Statement of
Fullston T, Finnis M, Hackett A, Hodgson B, Brueton L, Baynam G, Norman A, Reish O, Shoubridge C, and Gecz J.
Abstract: ARX mutations cause a diverse spectrum of human disorders, ranging from severe brain and genital malformations to non-syndromic intellectual disability (ID). ARX is a transcription factor with multiple domains that include four polyalanine (pA) tracts, the first two of which are frequently expanded by mutations. We progressively screened DNA samples from 613 individuals with ID initially for the most frequent ARX mutations (c.304ins(GCG)7‘expansion’ of pA1 and c.429_452dup ‘dup24bp’ of pA2). Five hundred samples without pA1 or pA2 mutations had the entire ARX ORF screened by single stranded polymorphism conformation (SSCP) and/or denaturing high pressure liquid chromatography (dHPLC) analysis. Overall, eight families with six mutations in ARX were identified (1.31%): five duplication mutations in pA2 (0.82%) with three new clinical reports of families with the dup24bp and two duplications larger than the dup24bp mutation discovered (dup27bp, dup33bp); and three point mutations (0.6%), including one novel mutation in the homeodomain (c.1074G>T). Four ultraconserved regions distal to ARX (uc466–469) were also screened in a subset of 94 patients, with three unique nucleotide changes identified in two (uc466, uc467). The subcellular localization of full length ARX proteins was assessed for 11 variants. Protein mislocalization increased as a function of pA2 tract length and phenotypic severity, as has been previously suggested for pA1. Similarly, protein mislocalization of the homeodomain mutations also correlated with clinical severity, suggesting an emerging genotype vs cellular phenotype correlation.
Keywords: ARX
intellectual disability
protein mislocalization
Rights: © 2011 John Wiley & Sons A/S
DOI: 10.1111/j.1399-0004.2011.01685.x
Published version:
Appears in Collections:Aurora harvest
Obstetrics and Gynaecology publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.