Cyclase-associated protein, CAP; accelerates nucleotide exchange and actin filament depolymerization; N-terminus binds adenylate cyclase, facilitating activation by RAS and directly catalyzes cofilin-mediated severing of actin filaments; C-terminus binds and recycles cofilin bound, ADP-actin monomers, facilitating regulation of actin dynamics and cell morphogenesis; processively tracks and promotes depolymerization of actin filament barbed and pointed ends;  mCAP1 is the mouse homolog