Dynactin is a 23 subunitprotein complex that acts as a co-factor for the microtubule motor cytoplasmic dynein-1. It is built around a short filament of actin related protein-1 (Arp1).[1][2]
^Carter AP, Diamant AG, Urnavicius L (April 2016). "How dynein and dynactin transport cargos: a structural perspective". Current Opinion in Structural Biology. 37: 62–70. doi:10.1016/j.sbi.2015.12.003. PMID26773477.