This family contains p22, the smallest subunit of dynactin, a complex that binds to cytoplasmic dynein and is a required activator for cytoplasmic dynein-mediated vesicular transport. Dynactin localises to the cleavage furrow and to the midbodies of dividing cells, suggesting that it may function in cytokinesis [1]. Family members are approximately 170 residues long.

1: Characterization of the p22 subunit of dynactin reveals the localization of cytoplasmic dynein and dynactin to the midbody of dividing cells. Karki S, LaMonte B, Holzbaur EL; J Cell Biol 1998;142:1023-1034. PMID:9722614