Predicted to enable clathrin light chain binding activity. Involved in anterograde axonal transport; positive regulation of clathrin coat assembly; and positive regulation of retrograde axon cargo transport. Located in axon. Biomarker of attention deficit hyperactivity disorder. Human ortholog(s) of this gene implicated in attention deficit hyperactivity disorder. Orthologous to human CALY (calcyon neuron specific vesicular protein). [provided by Alliance of Genome Resources, Apr 2022]