An amino acid deletion in SZT2 in a family with non-syndromic intellectual disability

Michelle Falcone, Kemal O. Yariz, David B. Ross, Joseph Foster, Ibis Menendez, Mustafa Tekin

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Autosomal recessive intellectual disability (ID) is characterized by extensive genetic heterogeneity. Recently, three mutations in SZT2 were reported in two unrelated children with unexplained infantile epileptic encephalopathy with severe ID. Here we report a European American family with three children having non-syndromic mild or moderate ID without seizures. Whole-exome sequencing of three affected siblings revealed a three base pair deletion (c. 4202-4204delTTC) located in a 19 mb autozygous region on chromosome 1, leading to an amino acid deletion (p.Phe1401del) in SZT2. All three children were homozygous for the deletion and their parents were heterozygous as expected in autosomal recessive inheritance. SZT2 is highly expressed in neuronal tissues and regulates seizure threshold and neuronal excitation in mice. We conclude that the disruption of SZT2 with some residual function might lead to mild or moderate ID without seizures.

Original languageEnglish
Article numbere82810
JournalPLoS One
Volume8
Issue number12
DOIs
StatePublished - Dec 6 2013

Fingerprint

amino acid deletion
seizures
Chromosomes
Intellectual Disability
Tissue
Amino Acids
Seizures
encephalopathy
Exome
Genetic Heterogeneity
Chromosomes, Human, Pair 1
inheritance (genetics)
Brain Diseases
Base Pairing
chromosomes
mutation
Siblings
Parents
mice
Mutation

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

An amino acid deletion in SZT2 in a family with non-syndromic intellectual disability. / Falcone, Michelle; Yariz, Kemal O.; Ross, David B.; Foster, Joseph; Menendez, Ibis; Tekin, Mustafa.

In: PLoS One, Vol. 8, No. 12, e82810, 06.12.2013.

Research output: Contribution to journalArticle

Falcone, Michelle ; Yariz, Kemal O. ; Ross, David B. ; Foster, Joseph ; Menendez, Ibis ; Tekin, Mustafa. / An amino acid deletion in SZT2 in a family with non-syndromic intellectual disability. In: PLoS One. 2013 ; Vol. 8, No. 12.
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