Protein bicaudal D homolog 2 (BICD2)

Acts as an adapter protein linking the dynein motor complex to various cargos and converts dynein from a non- processive into a highly processive motor in the presence of dynactin. Facilitates and stabilizes the interaction between dynein and dynactin and activates dynein processivity (the ability to move along a microtubule for a long distance without falling off the trail ) (By similarity).

Facilitates the binding of RAB6A into the Golgi by stabilizing its GTP-bound form. Regulates coat complicated coatomer protein I (COPI)-independent Golgi-endoplasmic reticulum transport via its interaction with RAB6A and recruiting of this dynein-dynactin motor complex (PubMed:25962623).