Engulfment of pathogens by phagocytosis requires the coordination of actin assembly and progressive 'zippering' of pseudopodial membranes around the particle. Recent work shows that Myosin-X, which binds phosphatidylinositol-3-OH kinase (PI(3) K) products through its pleckstrin homology (PH) domains, is required for phagocytosis, thereby providing a molecular basis for the function of PI(3) K in pseudopod extension.