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Mapping the interaction of the STT3 subunit of the oligosaccharyl transferase complex with nascent polypeptide chains
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2005 (English)In: Journal of Biological Chemistry, ISSN 0021-9258, E-ISSN 1083-351X, Vol. 280, no 49, 40489-40493 p.Article in journal (Refereed) Published
Abstract [en]

Many secretory and membrane proteins are N-glycosylated by the oligosaccharyl transferase complex during their translocation across the endoplasmic reticulum membrane. Several experimental observations suggest that the highly conserved STT3 subunit contains the active site of the oligosaccharyl transferase. Here, we report a detailed study of the interaction between the active site of the STT3 protein and nascent polypeptide chains using an in vitro photocrosslinking technique. Our results show that the addition of a glycan moiety in a stretch of similar to 15 residues surrounding a QK*T cross-linking site impairs the interaction between the nascent chain and STT3.

Place, publisher, year, edition, pages
2005. Vol. 280, no 49, 40489-40493 p.
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Biochemistry and Molecular Biology
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URN: urn:nbn:se:su:diva-18851DOI: 10.1074/jbc.M509168200ISI: 000233666600014PubMedID: 16216884OAI: oai:DiVA.org:su-18851DiVA: diva2:185374
Available from: 2007-12-27 Created: 2007-12-27 Last updated: 2017-12-13Bibliographically approved

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von Heijne, GunnarNilsson, IngMarie
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