Enables insulin receptor binding activity and ubiquitin protein ligase binding activity. Involved in several processes, including response to activity; response to insulin; and response to monosodium L-glutamate. Located in plasma membrane. Part of insulin receptor complex. Human ortholog(s) of this gene implicated in obesity and type 2 diabetes mellitus. Orthologous to human SORBS1 (sorbin and SH3 domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]