Ontology Term : Pfam:PF05251 Oligosaccharyltransferase subunit 5 EMBL-EBI

Description  Eukaryotic N-glycosylation is catalysed in the ER lumen, where the enzyme oligosaccharyltransferase (OTase) transfers donor glycans from a dolichol pyrophosphate (DolP) carrier (Lipid-linked oligosaccharide; LLO) to polypeptides. The yeast OTase is a hetero-oligomeric complex composed of essential (Ost1, Ost2, Wbp1, Stt3, and Swp1) and nonessential (Ost3, Ost4, Ost5, and Ost6) subunits. This domain family is found in Ost5, Swiss:Q92316. The precise function of this subunit is not known, however Ost5 appears to form a sub-complex with Ost1, and this sub-complex associates with the catalytic Stt3 subunit of OTase. Down regulation of Ost5 resulted in a limited effect on glycosylation and no effect on the stability of Ost1 or Stt3 subunits [1, 2].
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