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Isolation, Optimization of Fermentation Conditions, and Characterization of an Exopolysaccharide from Pseudoalteromonas agarivorans Hao 2018

1
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
2
Kyiv College, Qilu University of Technology, Jinan 250353, China
3
School of Food Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
4
Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Mar. Drugs 2019, 17(12), 703; https://doi.org/10.3390/md17120703
Received: 20 November 2019 / Revised: 10 December 2019 / Accepted: 11 December 2019 / Published: 13 December 2019
In recent years, the wide application of exopolysaccharides (EPSs) in food, cosmetics, medicine, and other fields has drawn tremendous attention. In this study, an EPS produced by Pseudoalteromonas agarivorans Hao 2018 was isolated and purified, and its fermentation conditions were optimized. Its structure and biological functions were also studied. The purity and molecular weight of EPS were determined by high performance liquid chromatography (HPLC), and the EPS exhibited a number average of 2.26 × 105 and a weight average of 2.84 × 105. EPS has good adsorption for Cu2+ and Pb2+. The adsorption rates can reach up to 69.79% and 82.46%, respectively. The hygroscopic property of EPS was higher than that of chitosan, but slightly lower than that of sodium hyaluronate. However, the water-retaining activity of EPS was similar to that of chitosan and sodium hyaluronate. EPS has strong ability to scavenge free radicals, including OH radical and O2− radical. Further, its activity on O2− radicals has similarities with that of vitamin C. EPS has broad application prospects in many fields, such as cosmetics, environmental protection. View Full-Text
Keywords: marine bacteria; fermentation optimization; structural analysis; oxidation resistance marine bacteria; fermentation optimization; structural analysis; oxidation resistance
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Hao, L.; Liu, W.; Liu, K.; Shan, K.; Wang, C.; Xi, C.; Liu, J.; Fan, Q.; Zhang, X.; Lu, X.; Xu, Y.; Cao, R.; Ma, Y.; Zheng, L.; Cui, B. Isolation, Optimization of Fermentation Conditions, and Characterization of an Exopolysaccharide from Pseudoalteromonas agarivorans Hao 2018. Mar. Drugs 2019, 17, 703.

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