Oligomer. Interacts with HCK (via SH3 domain). Phosphorylated on Tyr when associated with HCK. A chromosomal aberration involving WDCP is found in one subject with colorectal cancer. Translocation t(2;2)(p23.3;p23.1). A 5 million base pair tandem duplication generates an in-frame WDCP-ALK gene fusion.