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The yeast expression system for recombinant glycosyltransferases
M Malissard1, S Zeng, E G Berger
1Institute of Physiology, University Zurich, Zürich, Switzerland.
Glycoconjugate Journal
|December 28, 1999
Summary
Yeast expression systems, particularly Pichia pastoris, are effective for producing recombinant glycosyltransferases for oligosaccharide synthesis. P. pastoris secretes these enzymes, simplifying purification compared to Saccharomyces cerevisiae.
Area of Science:
- Biotechnology
- Enzymology
- Glycobiology
Background:
- Glycosyltransferases are crucial for oligosaccharide synthesis but difficult to purify from natural sources.
- Recombinant expression systems are developed to produce soluble glycosyltransferases.
- Yeast expression systems are evaluated for their efficiency in producing these enzymes.
Purpose of the Study:
- To review the development of yeast expression systems for glycosyltransferases.
- To compare Saccharomyces cerevisiae and Pichia pastoris for recombinant enzyme production.
- To highlight successful glycosyltransferase expressions in yeast.
Main Methods:
- Focus on yeast (Saccharomyces cerevisiae and Pichia pastoris) as expression hosts.
- Analysis of enzyme secretion and glycosylation patterns.
- Review of specific glycosyltransferases successfully expressed.
Main Results:
- Saccharomyces cerevisiae shows fermentation advantages but poor secretion of recombinant glycosyltransferases.
- Pichia pastoris efficiently secretes soluble, orthoglycosylated glycosyltransferases into the supernatant.
- Several key glycosyltransferases, including beta1,4galactosyltransferase and sialyltransferases, have been successfully expressed.
Conclusions:
- Pichia pastoris is a superior yeast host for secreting and purifying recombinant glycosyltransferases.
- Yeast expression systems offer a viable route for in vitro oligosaccharide synthesis.
- Ongoing research aims to enhance yeast glycosylation capabilities.