Enables kinesin binding activity. Involved in several processes, including behavioral fear response; excitatory postsynaptic potential; and regulation of neurotransmitter receptor activity. Acts upstream of or within JNK cascade. Located in cytoplasm; neuronal cell body; and postsynaptic density. Is expressed in several structures, including alimentary system; genitourinary system; nervous system; sensory organ; and skeleton. Orthologous to human MAPK8IP2 (mitogen-activated protein kinase 8 interacting protein 2). [provided by Alliance of Genome Resources, Apr 2022]