Predicted to enable dolichyl-diphosphooligosaccharide-protein glycotransferase activity. Predicted to be involved in cellular protein metabolic process; glycoprotein catabolic process; and response to unfolded protein. Predicted to be located in endoplasmic reticulum. Predicted to be part of oligosaccharyltransferase I complex and oligosaccharyltransferase II complex. Human ortholog(s) of this gene implicated in congenital disorder of glycosylation Ix. Orthologous to human STT3B (STT3 oligosaccharyltransferase complex catalytic subunit B). [provided by Alliance of Genome Resources, Apr 2022]