Rho perekonna monomeersete GTPaaside üks liikmetest, mis reguleerib rakus aktiini ja mikrotuubulite ümberkorraldust, rakutsükli toimumist, geenide transkriptsiooni ja ainete transporti läbi membraanide, Ras homolog gene family, member A (RhoA) is a small GTPase protein of Rho family. RHOA, the most-studied member of the Rho subclass of the Rho family of GTPases. While the effects of RhoA activity are not all well known, it is primarily associated with cytoskeleton regulation, mostly actin stress fibers formation and actomyosin contractility. In humans, it is encoded by the gene RHOA