Mutant FUS proteins that cause amyotrophic lateral sclerosis incorporate into stress granules

Hum Mol Genet. 2010 Nov 1;19(21):4160-75. doi: 10.1093/hmg/ddq335. Epub 2010 Aug 10.


Mutations in the RNA-binding protein FUS (fused in sarcoma) are linked to amyotrophic lateral sclerosis (ALS), but the mechanism by which these mutants cause motor neuron degeneration is not known. We report a novel ALS truncation mutant (R495X) that leads to a relatively severe ALS clinical phenotype compared with FUS missense mutations. Expression of R495X FUS, which abrogates a putative nuclear localization signal at the C-terminus of FUS, in HEK-293 cells and in the zebrafish spinal cord caused a striking cytoplasmic accumulation of the protein to a greater extent than that observed for recessive (H517Q) and dominant (R521G) missense mutants. Furthermore, in response to oxidative stress or heat shock conditions in cultures and in vivo, the ALS-linked FUS mutants, but not wild-type FUS, assembled into perinuclear stress granules in proportion to their cytoplasmic expression levels. These findings demonstrate a potential link between FUS mutations and cellular pathways involved in stress responses that may be relevant to altered motor neuron homeostasis in ALS.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Amyotrophic Lateral Sclerosis / genetics*
  • Animals
  • Cell Line
  • Cytoplasm / metabolism
  • Female
  • Green Fluorescent Proteins / genetics
  • Humans
  • Male
  • Middle Aged
  • Mutation, Missense
  • Oxidative Stress
  • RNA-Binding Protein FUS / genetics
  • RNA-Binding Protein FUS / metabolism
  • RNA-Binding Protein FUS / physiology*
  • Zebrafish


  • RNA-Binding Protein FUS
  • Green Fluorescent Proteins