Predicted to enable identical protein binding activity. Predicted to be involved in several processes, including cerebellar granule cell differentiation; modulation of chemical synaptic transmission; and regulation of synapse assembly. Predicted to act upstream of or within positive regulation of synapse assembly and protein secretion. Predicted to be located in extracellular region; parallel fiber to Purkinje cell synapse; and postsynaptic membrane. Predicted to be active in extracellular space; glutamatergic synapse; and synaptic cleft. Orthologous to human CBLN1 (cerebellin 1 precursor). [provided by Alliance of Genome Resources, Apr 2022]