Enables SH2 domain binding activity. Predicted to be involved in several processes, including positive regulation of cell adhesion; positive regulation of immune response; and positive regulation of integrin activation. Predicted to act upstream of or within positive regulation of cell adhesion and protein localization to plasma membrane. Part of protein-containing complex. Orthologous to human SKAP1 (src kinase associated phosphoprotein 1). [provided by Alliance of Genome Resources, Apr 2022]