Interaction between ROR1 and MuSK activation complex in myogenic cells
2018
: The ROR family of receptor tyrosine kinases, ROR1 and ROR2, is known to play an important role during skeletal muscle regeneration. ROR1 has a critical role in regulating satellite cell (SC) proliferation during muscle regeneration, and proinflammatory cytokines such as TNF-α and IL-1β can induce expression of ROR1 in myogenic cells via NF-κB activation. While searching for ROR1-interacting proteins in myogenic cells, we identified MuSK as a ROR1-binding protein. MuSK interacts with and phosphorylates ROR1 at the cytoplasmic proline-rich domain. ROR1 also interacts with the MuSK activator Dok-7 independently of MuSK interaction. Collectively, our results identified ROR1 as a new interacting partner for MuSK and Dok-7, which may have an important role in myogenic cell signaling.
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