Predicted to enable kinase activator activity; molecular adaptor activity; and proline-rich region binding activity. Involved in several processes, including positive regulation of dendritic spine development; positive regulation of transport; and regulation of modification of postsynaptic actin cytoskeleton. Located in several cellular components, including clathrin-coated pit; dendrite; and neuronal cell body. Is active in glutamatergic synapse and postsynaptic actin cytoskeleton. Orthologous to human ITSN1 (intersectin 1). [provided by Alliance of Genome Resources, Apr 2022]