Source of immunodominant MHC-associated peptides homolog
STT3 subunit of the oligosaccharyltransferase complex homolog B
STT3 subunit of the oligosaccharyltransferase complex homolog B (S. cerevisiae)
Component of the N-oligosaccharyl transferase enzyme which catalyzes the transfer of a high mannose oligosaccharide from a lipid-linked oligosaccharide donor to an asparagine residue within an Asn-X-Ser/Thr consensus motif in nascent polypeptide chains. N-glycosylation occurs cotranslationally and the complex associates with the Sec61 complex at the channel-forming translocon complex that mediates protein translocation across the endoplasmic reticulum (ER). SST3B seems to be involved in complex substrate specificity.
Expressed in heart, brain, placenta, lung, liver, muscle, kidney and pancreas. Expressed in skin fibroblasts (at protein level).