Calcium-regulated, actin-modulating protein that binds to the plus (or barbed) ends of actin monomers or filaments, preventing monomer exchange (end-blocking or capping). Binds actin but does not nucleate actin polymerization, albeit slows down elongation by blocking the barbed ends. By promoting actin depolymerization, required for the elimination of presynaptic components downstream of the egl-1, ced-4 and ced-3 apoptotic pathway during larval development. Monomer. Binds to actin monomers and filaments. Belongs to the villin/gelsolin family.