Supports cell migration. May be involved in urothelial cell- matrix interactions. May be involved in tumor progression. {ECO:0000269|PubMed:11179665, ECO:0000269|PubMed:11245483, ECO:0000269|PubMed:12592373, ECO:0000269|PubMed:15012588}. This is the function of LYPD3 (LY6/PLAUR domain containing 3, ENSG00000124466).