May function as a motor for intraflagellar retrograde transport. Functions in cilia biogenesis. According to PubMed:8666668; it may play a role in transport between endoplasmic reticulum and Golgi or organization of the Golgi in cells. {ECO:0000269|PubMed:16061793; ECO:0000269|PubMed:16229832; ECO:0000269|PubMed:8666668}.