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| Smn-/- mice died during the peri-implantation stage, whereas transgenic mice harbouring SMN2 in the Smn-/- background showed pathological changes in the spinal cord and skeletal muscles similar to those of SMA patients  |
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mouse lacking the C-terminus of SMN lack nuclear targeting in the motor neuron of the SMN protein |
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Drosophila smn mutant show abnormal motor behavior, excitatory post-synaptic currents are reduced while synaptic motor neuron boutons are disorganized indicating defects at the neuromuscular junction |
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Caenorhabditis elegans with deletion of smn-1 display locomotor dysfunction, late larval arrest, reduced lifespan sterility and impaired pharyngeal activity |