2021
DOI: 10.21203/rs.3.rs-311090/v1
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Structural basis for the strict exclusion of proline from the N-glycosylation sequon

Abstract: Oligosaccharyltransferase (OST) catalyzes oligosaccharide transfer to the Asn residue in the N-glycosylation sequon, Asn-X-Ser/Thr, where Pro is strictly excluded at position X. Considering the unique structural properties of proline, this exclusion may not be surprising, but the structural basis for the rejection of Pro residues should be explained explicitly. The crystal structure of an archaeal OST in a complex with a sequon-containing peptide and dolichol-phosphate was determined to a 2.7 Å resolution. The… Show more

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