Involved in the regulation of cell migration (PubMed:18534823). May be involved in mediating the organization of the parallel fibers of granule cells during cerebellar development (By similarity). {ECO:0000250|UniProtKB:O88277, ECO:0000269|PubMed:18534823}. This is the function of FAT2 (FAT atypical cadherin 2, Ensembl gene identifier ENSG00000086570).