Skip to Main content Skip to Navigation
Journal articles

Deletion of smn-1, the Caenorhabditis elegans ortholog of the spinal muscular atrophy gene, results in locomotor dysfunction and reduced lifespan.

Abstract : Spinal muscular atrophy is the most common genetic cause of infant mortality and is characterized by degeneration of lower motor neurons leading to muscle wasting. The causative gene has been identified as survival motor neuron (SMN). The invertebrate model organism Caenorhabditis elegans contains smn-1, the ortholog of human SMN. Caenorhabditis elegans smn-1 is expressed in various tissues including the nervous system and body wall muscle, and knockdown of smn-1 by RNA interference is embryonic lethal. Here we show that the smn-1(ok355) deletion, which removes most of smn-1 including the translation start site, produces a pleiotropic phenotype including late larval arrest, reduced lifespan, sterility as well as impaired locomotion and pharyngeal activity. Mutant nematodes develop to late larval stages due to maternal contribution of the smn-1 gene product that allows to study SMN-1 functions beyond embryogenesis. Neuronal, but not muscle-directed, expression of smn-1 partially rescues the smn-1(ok355) phenotype. Thus, the deletion mutant smn-1(ok355) provides a useful platform for functional analysis of an invertebrate ortholog of the human SMN protein.
Document type :
Journal articles
Complete list of metadatas

Cited literature [28 references]  Display  Hide  Download

https://www.hal.inserm.fr/inserm-00405389
Contributor : Sandrine Fraboulet <>
Submitted on : Monday, August 17, 2009 - 3:45:24 PM
Last modification on : Thursday, February 1, 2018 - 1:11:37 AM
Long-term archiving on: : Tuesday, June 15, 2010 - 8:34:12 PM

File

97.pdf
Publisher files allowed on an open archive

Identifiers

Collections

U836 | UGA

Citation

Michael Briese, Behrooz Esmaeili, Sandrine Fraboulet, Emma Burt, Stefanos Christodoulou, et al.. Deletion of smn-1, the Caenorhabditis elegans ortholog of the spinal muscular atrophy gene, results in locomotor dysfunction and reduced lifespan.. Human Molecular Genetics, Oxford University Press (OUP), 2009, 18 (1), pp.97-104. ⟨10.1093/hmg/ddn320⟩. ⟨inserm-00405389⟩

Share

Metrics

Record views

617

Files downloads

759