Phosphorylation of hnRNP K controls cytosolic accumulation of TDP-43
2013
Background TAR-DNA binding protein 43 (TDP-43) is a heterogeneous ribonucleoprotein (hnRNP) identified as a major protein constituent of cytosolic inclusions in spinal cord of patients with motor neuron disease. The inclusions are formed by movement of TDP-43 from its predominantly nuclear localization to the cytosol, followed by accumulation of ubiquitinated and phosphorylated C-terminal TDP-43 fragments. The mechanisms controlling TDP-43 trafficking and accumulation are not well known, however, it has been demonstrated previously that kinases control movement and accumulation of hnRNPs. Therefore, we investigated whether kinases also controlled TDP-43 accumulation during cell stress.
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