Necessary for the biogenesis, correct folding and transport of multi-pass membrane proteins into the endoplasmic reticulum (ER) membrane. Involved in the regulation of calcium ion homeostasis in the ER. Required for proper protein degradation via the ERAD (ER-associated degradation) pathway. Heteromeric complex composed of WDR83OS/Asterix and CCDC47. Component of the ribosome-associated ER translocon complex.