Associates with the actin cytoskeleton and may regulate actin polymerization in lamellipodia, through a rac1-dependent signaling pathway. May play a role in cell motility. Involved in cytokinesis by regulating the microtubule system and linking it to the cortical actin network. May interact with rac1A. Weakly expressed in cytoplasm. Found in actin-rich protrusions, and lamellipodia and filopodia during motility. Expressed from 0 hours to 12 hours upon starvation (at protein level). Expressed in the polar region during cytokinesis. Cells exhibit longer microtubules than normal. During mitosis, interphase microtubules and the spindle persist far longer than in wild-type cells.