Enables ephrin receptor binding activity. Involved in several processes, including regulation of modification of synaptic structure; regulation of neuron projection development; and synapse pruning. Located in several cellular components, including dendrite; distal axon; and perikaryon. Is integral component of plasma membrane. Is active in glutamatergic synapse. Biomarker of toxic encephalopathy. Orthologous to human EPHA4 (EPH receptor A4). [provided by Alliance of Genome Resources, Apr 2022]