Required for muscle development probably through the regulation of the actin-myosin cytoskeleton. During the formation of neuromuscular junctions at the larval stage, negatively regulates membrane protrusion from body wall muscles, probably through lamins such as epi-1, lam-2 and unc-52. Required for distal tip cell migration and dorsal pathfinding. Required for egg-laying. May play a role in cell motility and cell-cell interactions. Heterodimer of an alpha and a beta subunit. Alpha pat-2 associates with beta pat-3 (By similarity). Belongs to the integrin alpha chain family.