Identification and characterization of novel sequence variations in MECP2 gene in Rett syndrome patients

Brain Dev. 2010 Nov;32(10):843-8. doi: 10.1016/j.braindev.2009.11.007. Epub 2009 Dec 23.

Abstract

Rett syndrome (RS) is a neurodevelopmental disorder caused by mutations in MECP2 gene. Exons 2, 3, and 4, in addition to intronic and 3'UTR adjacent regions, were sequenced in 80 patients with RS. Twenty-nine sequence variations were detected in 49 patients, 34 (69.4%) patients with the classic form of RS, and 15 (30.6%) patients with atypical forms of RS. Thirteen of the 29 detected mutations represent novel sequence variations. Missense mutation T158M was the most commonly observed mutation, detected in nine patients (11.2%). Six hotspot pathogenic mutations (R133C, T158M, R168X, R255X, R270X, and R294X) were responsible for the phenotype in 26/80 patients (32.5%).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Blood Protein Electrophoresis
  • Brazil
  • Child
  • Female
  • Frameshift Mutation / genetics
  • Genetic Variation
  • Genotype
  • Humans
  • Male
  • Methyl-CpG-Binding Protein 2 / genetics*
  • Mutation / genetics
  • Mutation, Missense / genetics
  • Phenotype
  • Rett Syndrome / genetics*

Substances

  • MECP2 protein, human
  • Methyl-CpG-Binding Protein 2