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Neuron. 1998 Dec;21(6):1327-37.

Identification of the mouse neuromuscular degeneration gene and mapping of a second site suppressor allele.

Author information

1
The Jackson Laboratory, Bar Harbor, Maine 04609, USA. gac@jax.org

Abstract

The nmd mouse mutation causes progressive degeneration of spinal motor neurons and muscle atrophy. We identified the mutated gene as the putative transcriptional activator and ATPase/DNA helicase previously described as Smbp2, Rip1, Gf1, or Catf1. Mutations were found in two alleles-a single amino acid deletion in nmdJ and a splice donor mutation in nmd2J. The selective vulnerability of motor neurons is striking in view of the widespread expression of this gene, although the pattern of degeneration may reflect a specific threshold since neither allele is null. In addition, the severity of the nmd phenotype is attenuated in a semidominant fashion by a major genetic locus on chromosome (Chr) 13. The identification of the nmd gene and mapping of a major suppressor provide new opportunities for understanding mechanisms of motor neuron degeneration.

PMID:
9883726
[Indexed for MEDLINE]
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