Enables GTPase activator activity and protein N-terminus binding activity. Involved in cellular response to epidermal growth factor stimulus; negative regulation of cell growth; and negative regulation of signal transduction. Predicted to be located in axon; endocytic vesicle; and neuronal cell body membrane. Predicted to be part of AIP1-IRE1 complex. Orthologous to human DAB2IP (DAB2 interacting protein). [provided by Alliance of Genome Resources, Apr 2022]