Regulates lamellipodial actin dynamics in a CTTN-dependent manner. May form homomers (By similarity). May interact with MOB4, PPP2R1A, PPP2CB, STK24, STK25, STK26, STRN4, STRIP1 and STRIP2 (By similarity). Interacts with CTTN/cortactin; this interaction may redistribute CTTN to stress fibers. Predominantly expressed in skin, also detectable in spleen and lung (at protein level). Very low levels, if any, in brain (at protein level).