Background: Abnormal accumulation of mutant FUS/TLS is a pathological change in patients with amyotrophic lateralsclerosis (ALS). Results: A pathogenic mutation, G156E, increases propensities of FUS/TLS for aggregation in vitro and in vivo. Conclusion: Intranuclear aggregation of mutant FUS/TLS is a molecular pathomechanism of ALS. Significance: A loss of functional TLS/FUS in the nucleus will lead to neurodegeneration.
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