Predicted to enable dolichyl-diphosphooligosaccharide-protein glycotransferase activity. Predicted to be involved in co-translational protein modification; post-translational protein modification; and protein N-linked glycosylation via asparagine. Located in membrane. Is expressed in craniocervical region bone and thoracic segment skeleton. Human ortholog(s) of this gene implicated in congenital disorder of glycosylation Iw. Orthologous to human STT3A (STT3 oligosaccharyltransferase complex catalytic subunit A). [provided by Alliance of Genome Resources, Apr 2022]