Dolichyl Diphosphooligosaccharide Protein Glycosyltransferase (DDOST)

DDOST encodes a component of the oligosaccharyltransferase complex which catalyzes the transfer of high-mannose oligosaccharides to asparagine residues on nascent polypeptides in the lumen of the rough endoplasmic reticulum. The protein complex co-purifies with ribosomes. The product of this gene is also implicated in the processing of advanced glycation endproducts (AGEs), which form from non-enzymatic reactions between sugars and proteins or lipids and are associated with aging and hyperglycemia.DDOST mRNA was expressed intensely in heart and pancreas, but at lower levels in brain. the gene encoding the human DDOST 48-kD subunit is organized into 11 exons spanning about 9 kb. By fluorescence in situ hybridization, they assigned the DDOST subunit gene to chromosome 1p36.1.