Enables protein heterodimerization activity and protein homodimerization activity. Predicted to be involved in several processes, including calcium-mediated signaling using intracellular calcium source; heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules; and retrograde trans-synaptic signaling by trans-synaptic protein complex. Predicted to act upstream of or within cell adhesion. Predicted to be located in cell-cell junction; dendritic spine; and postsynaptic membrane. Predicted to be integral component of plasma membrane. Predicted to be active in neuron projection. Is expressed in several structures, including alimentary system; integumental system; nervous system; sensory organ; and skeleton. Orthologous to human TENM2 (teneurin transmembrane protein 2). [provided by Alliance of Genome Resources, Apr 2022]