Functions in endoplasmic reticulum to Golgi vesicle-mediated transport and regulates the proper organization of the endoplasmic reticulum and the Golgi (By similarity). Plays a key role in targeting to neuronal dendrites receptors such as HTR1A (By similarity). Plays also a role in primary cilium and sperm flagellum assembly probably through protein transport to these compartments (PubMed:33103737). {ECO:0000250|UniProtKB:Q6PEC3, ECO:0000250|UniProtKB:Q9CX30, ECO:0000269|PubMed:33103737}. This is the function of YIF1B (Yip1 interacting factor homolog B, membrane trafficking protein, ENSG00000167645).