Enables identical protein binding activity and microtubule binding activity. Predicted to be involved in several processes, including microtubule cytoskeleton organization; plasma membrane bounded cell projection organization; and regulation of microtubule cytoskeleton organization. Predicted to act upstream of or within melanosome transport. Part of cytoplasmic dynein complex. Biomarker of synucleinopathy. Human ortholog(s) of this gene implicated in Perry syndrome; amyotrophic lateral sclerosis type 1; and distal hereditary motor neuronopathy type 7B. Orthologous to human DCTN1 (dynactin subunit 1). [provided by Alliance of Genome Resources, Apr 2022]