The function of MMP14 (matrix metallopeptidase 14, ENSG00000157227) is as follows. Endopeptidase that degrades various components of the extracellular matrix such as collagen (PubMed:8015608). Essential for pericellular collagenolysis and modeling of skeletal and extraskeletal connective tissues during development (By similarity). Activates progelatinase A/MMP2, thereby acting as a positive regulator of cell growth and migration (PubMed:22065321, PubMed:8015608). Involved in the formation of the fibrovascular tissues in association with pro-MMP2 (PubMed:12714657, PubMed:22065321). May be involved in actin cytoskeleton reorganization by cleaving PTK7 (PubMed:20837484). Acts as a regulator of Notch signaling by mediating cleavage and inhibition of DLL1 (PubMed:21572390). Cleaves ADGRB1 to release vasculostatin-40 which inhibits angiogenesis (PubMed:22330140). Acts as a negative regulator of the GDF15-GFRAL aversive response by mediating cleavage and inactivation of GFRAL (PubMed:35177851). {ECO:0000250|UniProtKB:P53690, ECO:0000269|PubMed:12714657, ECO:0000269|PubMed:20837484, ECO:0000269|PubMed:21572390, ECO:0000269|PubMed:22065321, ECO:0000269|PubMed:22330140, ECO:0000269|PubMed:35177851, ECO:0000269|PubMed:8015608}.