Mutation of SYNE-1, encoding an essential component of the nuclear lamina, is responsible for autosomal recessive arthrogryposis

Ruben Attali, Nasim Warwar, Ariel Israel, Irina Gurt, Elizabeth McNally, Megan Puckelwartz, Benjamin Glick, Yoram Nevo, Ziva Ben-Neriah, Judith Melki*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

Abstract

Arthrogryposis multiplex congenita (AMC) is a group of disorders characterized by congenital joint contractures caused by reduced fetal movements. AMC has an incidence of 1 in 3000 newborns and is genetically heterogeneous. We describe an autosomal recessive form of myogenic AMC in a large consanguineous family. The disease is characterized by bilateral clubfoot, decreased fetal movements, delay in motor milestones, then progressive motor decline after the first decade. Genome-wide linkage analysis revealed a single locus on chromosome 6q25 with Zmax = 3.55 at θ = 0.0 and homozygosity of the polymorphic markers at this locus in patients. Homozygous A to G nucleotide substitution of the conserved AG splice acceptor site at the junction of intron 136 and exon 137 of the SYNE-1 gene was found in patients. This mutation results in an aberrant retention of intron 136 of SYNE-1 RNA leading to premature stop codons and the lack of the C-terminal transmembrane domain KASH of nesprin-1, the SYNE-1 gene product. Mice lacking the KASH domain of nesprin-1 display a myopathic phenotype similar to that observed in patients. Altogether, these data strongly suggest that the splice site mutation of SYNE-1 gene found in the family is responsible for AMC. Recent reports have shown that mutations of the SYNE-1 gene might be responsible for autosomal recessive adult onset cerebellar ataxia. These data indicate that mutations of nesprin-1 which interacts with lamin A/C may lead to at least two distinct human disease phenotypes, myopathic or neurological, a feature similar to that found in laminopathies.

Original languageEnglish (US)
Pages (from-to)3462-3469
Number of pages8
JournalHuman molecular genetics
Volume18
Issue number18
DOIs
StatePublished - 2009

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics
  • Genetics(clinical)

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