May function in the anterograde transport of protein from the endoplasmic reticulum (ER) to the Golgi complex and in the retrograde transport from the Golgi complex to the ER. Highly expressed in dry seeds. Expressed at low levels in roots, rosette and cauline leaves, stems and flowers. By salt and osmotic stresses. No visible phenotype under normal growth conditions. Belongs to the RINT1 family.