Abstract
Recently, the production of exopolysaccharide from Pseudozyma sp. SY16, which is mannosylerythritol lipid-producing yeast, has been occasionally observed during industrial fermentations. Moreover, exopolysaccharides derived from microbes are in high demand for the production of biopolymers. Therefore, this study aimed to investigate the production and characteristics of the exopolysaccharide produced by this strain. In batch fermentations with this strain, the maximum production yield of exopolysaccharide (5.8 g/L) was obtained under olive oil supplementation as a carbon source with culture conditions of 30°C, pH 8.0, and 600 rpm. Through a series of liquid chromatography steps, the exopolysaccharide was successfully purified, and its emulsifying activity was demonstrated. In addition, two-dimensional nuclear magnetic resonance analysis revealed that the exopolysaccharide is a galactoglucomannan with a novel and unique structure, consisting of galactose, glucose, and mannose in the ratio of 1:5:3.
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Acknowledgements
This research was supported by the KRIBB (Korea Research Institute of Bioscience and Biotechnology) Research Initiative Program (Grant No. KGS1292012; KGM5252012)(http://www.kribb.re.kr).
The authors declare no conflict of interest.
Neither ethical approval nor informed consent was required for this study.
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Kim, K.N., Lee, Y.J., Cho, DH. et al. A Novel Galactoglucomannan Exopolysaccharide Produced by Oil Fermentation with Pseudozyma sp. SY16. Biotechnol Bioproc E 25, 742–748 (2020). https://doi.org/10.1007/s12257-020-0066-x
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DOI: https://doi.org/10.1007/s12257-020-0066-x