title: Characterization and Biotechnological Potential Analysis of a New Exopolysaccharide from the Arctic Marine Bacterium Polaribacter sp. SM1127.
abstract: Although many kinds of exopolysaccharides (EPSs) from microorganisms have been used in industry, the exploration and utilization of EPSs from polar microorganisms is still rather rare. In this study, a flavobacterial strain, SM1127, from the Arctic brown alga Laminaria, was screened for its high EPS production (2.11 g/l) and was identified as belonging to the genus Polaribacter. The EPS secreted by strain SM1127 has a molecular mass of 220 kDa, and it mainly comprises N-acetyl glucosamine, mannose and glucuronic acid residues bound by heterogeneous linkages. Rheological studies on the aqueous EPS showed that it had a high viscosity and good shear-thinning property. Moreover, the EPS showed a high tolerance to high salinity and a wide pH range. The EPS also had good antioxidant activity. Particularly, its moisture-retention ability was superior to that of any other reported EPS or functional ingredient generally used in cosmetics. The EPS also showed a protective effect on human dermal fibroblasts at low temperature (4 °C). Safety assessment indicated that the EPS is safe for oral administration and external use. These results indicate the promising potential of the EPS from strain SM1127 in the food, cosmetic, pharmaceutical and biomedical fields.
authors.affiliation: State Key Laboratory of Microbial Technology, Jinan 250100, China.|Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Mei-Ling
authors.initials: ML
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Microbial Technology, Jinan 250100, China.|Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Microbial Technology, Jinan 250100, China.|Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Shi
authors.affiliation: State Key Laboratory of Microbial Technology, Jinan 250100, China.|Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Xi-Ying
authors.initials: XY
authors.lastname: Zhang
authors.affiliation: Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Bai-Cheng
authors.initials: BC
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Microbial Technology, Jinan 250100, China.|Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Yu-Zhong
authors.initials: YZ
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Microbial Technology, Jinan 250100, China.|Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
authors.forename: Xiu-Lan
authors.initials: XL
authors.lastname: Chen
mesh_terms: D001110:Arctic Regions; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001709:Biotechnology; D003080:Cold Temperature; D041965:Flavobacteriaceae / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D006801:Humans; D008970:Molecular Weight; D000459:Phaeophyceae / Q000382:microbiology; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis* / Q000378:metabolism; D054712:Salinity; D014783:Viscosity
chemical_list: D011135:Polysaccharides, Bacterial