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- W2980494934 endingPage "1264" @default.
- W2980494934 startingPage "1264" @default.
- W2980494934 abstract "Small GTPases regulate cytoskeletal dynamics, cell motility, and division under precise spatiotemporal control. Different small GTPases exhibit cross talks to exert feedback response or to act in concert during signal transduction. However, whether and how specific cytoskeletal components’ feedback to upstream signaling factors remains largely elusive. Here, we report an intriguing finding that disruption of the Arp2/3-branched actin specifically reduces RhoA activity but upregulates its total protein abundance. We further dissect the mechanisms underlying these circumstances and identify the altered cortactin/p190RhoGAP interaction and weakened CCM2/Smurf1 binding to be involved in GTP-RhoA reduction and total RhoA increase, respectively. Moreover, we find that cytokinesis defects induced by Arp2/3 inhibition can be rescued by activating RhoA. Our study reveals an intricate feedback from the actin cytoskeleton to the small GTPase. Our work highlights the role of Arp2/3-branched actin in signal transduction aside from its function in serving as critical cytoskeletal components to maintain cell morphology and motility." @default.
- W2980494934 created "2019-10-25" @default.
- W2980494934 creator A5023257717 @default.
- W2980494934 creator A5028761204 @default.
- W2980494934 creator A5045749265 @default.
- W2980494934 creator A5052236772 @default.
- W2980494934 date "2019-10-16" @default.
- W2980494934 modified "2023-09-28" @default.
- W2980494934 title "Arp2/3-Branched Actin Maintains an Active Pool of GTP-RhoA and Controls RhoA Abundance" @default.
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- W2980494934 doi "https://doi.org/10.3390/cells8101264" @default.
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