Enables microtubule binding activity and receptor tyrosine kinase binding activity. Involved in several processes, including NMDA selective glutamate receptor signaling pathway; generation of neurons; and regulation of MAPK cascade. Located in several cellular components, including axon; postsynaptic density; and ruffle membrane. Is active in glutamatergic synapse. Is extrinsic component of postsynaptic density membrane. Colocalizes with microtubule. Orthologous to human TIAM1 (TIAM Rac1 associated GEF 1). [provided by Alliance of Genome Resources, Apr 2022]