Enables phosphatidylinositol 3-kinase binding activity. Involved in midgut development; nervous system development; and response to xenobiotic stimulus. Located in several cellular components, including brush border; neuronal cell body; and postsynaptic density. Biomarker of status epilepticus. Human ortholog(s) of this gene implicated in spinocerebellar ataxia type 37. Orthologous to human DAB1 (DAB adaptor protein 1). [provided by Alliance of Genome Resources, Apr 2022]