Dynactin is a multi-subunit complex and a required cofactor for most, or all, of the cellular processes powered by the microtubule-based motor cytoplasmic dynein. p62 binds directly to the Arp1 subunit of dynactin [1,2].

1: Interaction of the p62 subunit of dynactin with Arp1 and the cortical actin cytoskeleton. Garces JA, Clark IB, Meyer DI, Vallee RB; Curr Biol 1999;9:1497-1500. PMID:10607597

2: A dynactin subunit with a highly conserved cysteine-rich motif interacts directly with Arp1. Karki S, Tokito MK, Holzbaur EL; J Biol Chem 2000;275:4834-4839. PMID:10671518