Mediates endoplasmic reticulum to Golgi transport. Together with p115/USO1 and GM130/GOLGA2, involved in vesicle tethering and fusion at the cis-Golgi membrane to maintain the stacked and inter-connected structure of the Golgi apparatus.
(Microbial infection) Required for the efficient production of infectious virion during human cytomegalovirus infection. Mechanistically, participates in the formation of the cytoplasmic viral assembly compartment where tegument acquisition and envelopment occur.
Subcellular locations: Endoplasmic reticulum-Golgi intermediate compartment membrane, Golgi apparatus membrane
Localizes throughout the Golgi apparatus, but most abundant in the cis-most cisternae.