Tags: Protein.
In molecular biology OST4 (Dolichyl-diphosphooligosaccharide–protein glycosyltransferase subunit 4) is a subunit of the oligosaccharyltransferase complex.OST4 is a very short approximately 30 amino acids protein found from fungi to vertebrates. It appears to be an integral membrane protein that mediates the en bloc transfer of a pre-assembled high-mannose oligosaccharide onto asparagine residues of nascent polypeptides as they enter the lumen of the rough endoplasmic reticulum.
