Expression system for structural and functional studies of human glycosylation enzymes
Journal Article
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· Nature Chemical Biology
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- Univ. of Georgia, Athens, GA (United States)
- Univ. of Wyoming, Laramie, WY (United States)
- Arizona State Univ., Tempe, AZ (United States)
- Columbia Univ., New York, NY (United States)
- Univ. of Georgia, Athens, GA (United States); Newcastle Univ., Newcastle upon Tyne (United Kingdom)
Vertebrate glycoproteins and glycolipids are synthesized in complex biosynthetic pathways localized predominantly within membrane compartments of the secretory pathway. The enzymes that catalyze these reactions are exquisitely specific, yet few have been extensively characterized because of challenges associated with their recombinant expression as functional products. We used a modular approach to create an expression vector library encoding all known human glycosyltransferases, glycoside hydrolases, and sulfotransferases, as well as other glycan-modifying enzymes. We then expressed the enzymes as secreted catalytic domain fusion proteins in mammalian and insect cell hosts, purified and characterized a subset of the enzymes, and determined the structure of one enzyme, the sialyltransferase ST6GalNAcII. Many enzymes were produced at high yields and at similar levels in both hosts, but individual protein expression levels varied widely. Furthermore, this expression vector library will be a transformative resource for recombinant enzyme production, broadly enabling structure–function studies and expanding applications of these enzymes in glycochemistry and glycobiology.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- NIH
- OSTI ID:
- 1432876
- Journal Information:
- Nature Chemical Biology, Journal Name: Nature Chemical Biology Journal Issue: 2 Vol. 14; ISSN 1552-4450
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
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