[No authors listed]
Immune cells navigate through different environments where they experience different mechanical forces. Responses to external forces are determined by the mechanical properties of a cell and they depend to a large extent on the actin-rich cell cortex. We report here that Myo1G, a previously uncharacterised member of class I myosins, is expressed specifically in haematopoietic tissues and cells. It is associated with the plasma membrane. This association is dependent on a conserved PH-domain-like myosin I tail homology motif and the head domain. However, the head domain does not need to be a functional motor. Knockdown of Myo1G in Jurkat cells decreased cell elasticity significantly. We propose that Myo1G regulates cell elasticity by deformations of the actin network at the cell cortex.
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