Regulator of RHO1 signaling that acts as a cofactor required for the efficient localization of the TUS1 GTP exchange factor (GEF) for RHO1 to the bud neck during all phases of cytokinesis (PubMed:22344253). RHO1 is a key, essential hub protein in the cell wall integrity (CWI) pathway in which activated RHO1-GTP binds directly to and activates multiple different downstream effectors required for cell wall synthesis and actin assembly during cytokinesis (Probable). Impairs the efficient localization of TUS1 to the bud neck at late anaphase. Present with 396 molecules/cell in log phase SD medium.