Enables protein domain specific binding activity. Involved in several processes, including cellular response to endothelin; cellular response to nitric oxide; and transmembrane receptor protein tyrosine kinase signaling pathway. Located in focal adhesion and plasma membrane. Human ortholog(s) of this gene implicated in breast ductal carcinoma. Orthologous to human BCAR1 (BCAR1 scaffold protein, Cas family member). [provided by Alliance of Genome Resources, Apr 2022]