Enables double-stranded RNA binding activity and protein phosphatase 1 binding activity. Involved in cellular response to oxidative stress; modification of postsynaptic structure; and positive regulation of long-term synaptic potentiation. Located in cytoplasm; neuron projection; and neuronal cell body. Is active in glutamatergic synapse. Orthologous to human STAU1 (staufen double-stranded RNA binding protein 1). [provided by Alliance of Genome Resources, Apr 2022]