Probably functions as a 3′-phosphoadenylyl sulfate:adenosine 3′,5′-bisphosphate antiporter at the Golgi membranes. Mediates the transport from the cytosol into the lumen of the Golgi of 3′-phosphoadenylyl sulfate/adenosine 3′-phospho 5′-phosphosulfate (PAPS), a universal sulfuryl donor for sulfation events that take place in that compartment.
