Seems to specifically activate progelatinase A. May thus trigger invasion by tumor cells by activating progelatinase A on the tumor cell surface. May be involved in actin cytoskeleton reorganization by cleaving PTK7. Acts as a positive regulator of cell growth and migration via activation of MMP15
Tissue Specificity
Expressed in stromal cells of colon, breast, and head and neck. Expressed in lung tumors
Cellular Localization
Membrane; Single-pass type I membrane protein (Potential). Melanosome. Cytoplasm. Note=Identified by mass spectrometry in melanosome fractions from stage I to stage IV. Forms a complex with BST2 and localizes to the cytoplasm