A founder mutation in Vps37A causes autosomal recessive complex hereditary spastic paraparesis

Yifat Zivony-Elboum, Wendy Westbroek, Nehama Kfir, David Savitzki, Yishay Shoval, Assnat Bloom, Raya Rod, Morad Khayat, Walid Samri, Hector Cohen, Vadim Sonkin, Tatiana Freidman, Dan Geiger, Aviva Fattal-Valevski, Yair Anikster, Aoife M. Waters, Robert Kleta

Research output: Contribution to journalArticlepeer-review


Background Members of two seemingly unrelated kindreds of Arab Moslem origin presented with pronounced early onset spastic paraparesis of upper and lower limbs, mild intellectual disability, kyphosis, pectus carinatum and hypertrichosis. Methods The authors performed neurological and developmental examinations on the affected individuals. The authors conducted whole genome linkage and haplotype analyses, followed by sequencing of candidate genes; RNA and protein expression studies; and finally proof of principle investigations on knockdown morpholino oligonucleotide injected zebrafish. Results The authors characterise a novel form of autosomal recessive complex hereditary spastic paraparesis (CHSP). MRI studies of brain and spinal cord were normal. Within a single significantly linked locus the authors ultimately identified a homozygous missense mutation c.1146A>T (p.K382N) in the vacuolar protein sorting 37A (Vps37A) gene, fully penetrant and segregating with the disease in both families. Mobility was significantly reduced in Vps37A knockdown morpholino oligonucleotide injected zebrafish, supporting the causal relationship between mutations in this gene and the phenotype described in the patients of this study. Conclusions The authors provide evidence for the involvement of Vps37A, a member of the endosomal sorting complex required for transport (ESCRT) system, in upper motor neuron disease. The ESCRT system has been shown to play a central role in intracellular trafficking, in the maturation of multivesicular bodies and the sorting of ubiquitinated membrane proteins into internal luminal vesicles. Further investigation of mechanisms by which dysfunction of this gene causes CHSP will contribute to the understanding of intracellular trafficking of vesicles by the ESCRT machinery and its relevance to CHSP.

Original languageEnglish
Pages (from-to)462-472
Number of pages11
JournalJournal of Medical Genetics
Issue number7
StatePublished - Jul 2012

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)


Dive into the research topics of 'A founder mutation in Vps37A causes autosomal recessive complex hereditary spastic paraparesis'. Together they form a unique fingerprint.

Cite this