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original articleIssue 14 (4) 2015 pp. 283-292

Iwona Gientka, Stanisław Błażejak, Lidia Stasiak-Różańska, Anna Chlebowska-Śmigiel

Department of Biotechnology, Microbiology and Food Evaluation, Warsaw University of Life Sciences - SGGW, Poland

Exopolysaccharides from yeast: insight into optimal conditions for biosynthesis, chemical composition and functional properties – review

Abstract

The yeast exopolysaccharides (EPS) are not a well-established group of metabolites. An industrial scale    of this EPS production is limited mainly by low yield biosynthesis. Until now, enzymes and biosynthesis pathways, as well as the role of regulatory genes, have not been described. Some of yeast EPS show antitumor, immunostimulatory and antioxidant activity. Others, absorb heavy metals and can function as bioactive components of food. Also, the potential of yeast EPS as thickeners or stabilizers can be found. Optimal conditions for the biosynthesis of yeast exopolysaccharides require strong oxygenation and low temperature of the culture, due to the physiology of the producer strains. The medium should contain sucrose as a carbon source and ammonium sulfate as inorganic nitrogen source, wherein the C:N ratio in the substrate should be 15:1. The cultures are long and the largest accumulation of polymers is observed after 4 or 5 days of culturing. The structure of yeast EPS is complex which affects the strain and culture condition. The EPS from yeast are linear mannans, pullulan, glucooligosaccharides, galactooligosaccharides and other heteropolysaccharides containing α-1,2; α-1,3; α-1,6; β-1,3; β-1,4 bonds. Mannose and glucose have the largest participation of carbohydrates forming EPS.

Keywords: yeast, exopolysaccharides, EPS
pub/.pdf Full text available in english in Adobe Acrobat format:
http://www.food.actapol.net/issue4/volume/1_4_2015.pdf

http://dx.doi.org/10.17306/J.AFS.2015.4.29

For citation:

MLA Gientka, Iwona, et al. "Exopolysaccharides from yeast: insight into optimal conditions for biosynthesis, chemical composition and functional properties – review." Acta Sci.Pol. Technol. Aliment. 14.4 (2015): 283-292. http://dx.doi.org/10.17306/J.AFS.2015.4.29
APA Gientka I., Błażejak S., Stasiak-Różańska L., Chlebowska-Śmigiel A (2015). Exopolysaccharides from yeast: insight into optimal conditions for biosynthesis, chemical composition and functional properties – review. Acta Sci.Pol. Technol. Aliment. 14 (4), 283-292 http://dx.doi.org/10.17306/J.AFS.2015.4.29
ISO 690 GIENTKA, Iwona, et al. Exopolysaccharides from yeast: insight into optimal conditions for biosynthesis, chemical composition and functional properties – review. Acta Sci.Pol. Technol. Aliment., 2015, 14.4: 283-292. http://dx.doi.org/10.17306/J.AFS.2015.4.29