Potential role in vesicular protein trafficking, mainly in the early secretory pathway. Required for the maintenance of the Golgi apparatus; involved in protein exchange between Golgi stacks during assembly. Probably not required for COPI-vesicle-mediated retrograde transport (By similarity).
Subcellular locations: Endoplasmic reticulum membrane, Golgi apparatus, Cis-Golgi network membrane, Endoplasmic reticulum-Golgi intermediate compartment membrane
Probably cycles between compartments of the early secretatory pathway.