ATAC-Seq of WT and Nedd4L-cKO Muscle stem cells
Muscle stem cell quiescence is a complex and dynamic state.  In this study we examined the role of the Ubiquitin Protease System in muscle stem cell function and quiescence.  Using a genetic mouse model where Nedd4L is selectively deleted in myogenic cells, we characterized the effect of the loss of Nedd4L on muscle stem cells.  With RNA-Seq we determined that the genetic deletion of Nedd4L resulted in the transition of the muscle stem cells out of deep quiescence and into Galert. Characterized by the upregulation of cell cycle genes and differentiation genes and loss of expression in numerous known quiescence genes.  Nedd4L-cKO muscle stem cells are more prone to differentiation and fail to expand properly in vitro. Overall design: To determine the effect of the genetic deletion of Nedd4L on the chromatin accessibility, ATAC-Seq was performed on 5000 freshly isolated MuSCs from WT and Nedd4L-cKO mice.