Possible role in transport between endoplasmic reticulum and Golgi. May form a heteromeric complex composed of ERGIC1, ERGIC2 and ERGIC3 (By similarity). Interacts with ERGIC3, the interaction is required for the stable expression of both proteins (By similarity). May interact with EEF1A1 (By similarity). Cycles between the endoplasmic reticulum and the Golgi. Belongs to the ERGIC family.