Enables ubiquitin protein ligase binding activity. Acts upstream of or within CXCL12-activated CXCR4 signaling pathway; hemopoiesis; and positive regulation of protein ubiquitination. Predicted to be located in membrane. Predicted to be integral component of membrane. Is expressed in several structures, including brain; cardiovascular system; genitourinary system; gut; and integumental system. Orthologous to human WBP1L (WW domain binding protein 1 like). [provided by Alliance of Genome Resources, Apr 2022]