Required for the post-translational delivery of tail-anchored (TA) proteins to the endoplasmic reticulum. Together with CAMLG/GET2, acts as a membrane receptor for soluble GET3/TRC40, which recognizes and selectively binds the transmembrane domain of TA proteins in the cytosol. Required to ensure correct topology and ER insertion of CAMLG.
Subcellular locations: Endoplasmic reticulum membrane