Integrin alpha ina-1/beta pat-3 is a receptor for laminin. Integrin alpha pat-2/beta pat-3 recognizes the sequence R-G-D in its ligands (Probable). Plays a role in cell migration, morphogenesis and probably in cell-cell interactions (PubMed:19023419, PubMed:17326220, PubMed:23283987). During gonad morphogenesis, involved in distal tip cell (DTC)-mediated guidance of gonad elongation, in maintaining their sharp tapering morphology and in their migration (PubMed:19023419). Component of an integrin containing attachment complex, which is required for muscle development and maintenance (PubMed:22253611). Involved in the assembly of dense bodies and M lines during body wall muscle embryonic development by recruiting one of their components, cpna-1, to integrin-mediated attachment sites (PubMed:23283987). May play a similar role in the assembly of dense bodies in gonadal myoepithelial sheath cells (PubMed:17326220). Probably by acting as a receptor for apoptotic cells, plays a role in the clearance of apoptotic cells during mid-embryogenesis (PubMed:20226672). Required for ovulation (PubMed:17326220). Dephosphorylated, probably within the alpha pat-2/beta pat-3 integrin receptor complex, by the phosphatase dep-1, which leads to down-stream effects including the negative regulation of let-23 signaling and vulval induction (PubMed:28135265). When unphosphosphorylated, recruits the cytoplasmic adapter protein tln-1 to the plasma membrane of secondary vulval precursor cells (PubMed:28135265). This promotes the linking of focal adhesion sites to the F-actin cytoskeleton, and it also acts to restrict the mobility of the let-23 receptor on the plasma membrane of vulval cells which thereby attenuates let-23 signaling (PubMed:28135265). Plays a role in axon regeneration after injury (PubMed:31109965). Heterodimer of an alpha and a beta subunit (Probable). Interacts with alpha subunit ina-1 (PubMed:9247263). Interacts with alpha subunit pat-2 (Probable). Component of an integrin containing attachment complex, composed of at least pat-2, pat-3, pat-4, pat-6, unc-52, unc-97 and unc-112 (PubMed:22253611). May interact with tns-1 (via C-terminus) (PubMed:31109965). In body wall muscle cells localizes to the base of thick filament M-lines, dense bodies (Z-disks) and in adhesion plaques which form between adjacent cells (PubMed:22479198, PubMed:20385102). In body wall muscles, colocalizes with cpna-1 at integrin adhesion structures (M line and dense bodies) (PubMed:23283987). Decreased localization to dense bodies during the L2/L3 molt (PubMed:20385102). In myoepithelial sheath cells, colocalizes in dense bodies-like structures with actin thin filaments, deb-1/vinculin and unc-52 (PubMed:17326220). Expressed in body wall muscles (at protein level) (PubMed:23283987, PubMed:20385102). Expressed in gonadal sheath cells and spermatheca (PubMed:17326220). Expressed in vulval cells and along the basal laminae that separate the vulval cells from the uterus (at the protein level) (PubMed:28135265). Expressed in embryos (PubMed:9247263, PubMed:23283987). Highly expressed in mid to late L3 stage larvae (PubMed:28135265). Expressed in adult animals (PubMed:20385102). Phosphorylated. Dephosphorylated by dep-1. RNAi-mediated knockdown in distal tip cell (DTC) causes DTC migration and guidance defects during the second phase of gonad elongation resulting in a triangular shaped gonad (PubMed:19023419). Embryos at the comma and 1.5-fold stages have increased number of cell corpses (PubMed:20226672). RNAi-mediated knockdown causes an accumulation in the proximal gonad of endomitotic mature oocytes (PubMed:17326220). RNAi-mediated knockdown results in increased mobility of let-23 receptor on the plasma membrane of vulval cells resulting in enhanced activity of the signaling pathway (PubMed:28135265). RNAi-mediated knockdown in vulval precursor cells in a let-60 gain of function mutant background results in increased vulval induction and an adjacent primary fate (Apf) phenotype whereby secondary vulval precursor cells transform into primary-like vulval cells (PubMed:28135265). RNAi-mediated knockdown results in impaired mobility, mitochondrial fragmentation and disrupted integrin attachment complexes in muscle (PubMed:22253611). This leads to degradation of muscle proteins in the cytosol, myofibrillar defects and disruption of sarcomere organization (PubMed:22253611). Belongs to the integrin beta chain family.