期刊
FOOD MICROBIOLOGY
卷 46, 期 -, 页码 418-427出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fm.2014.08.022
关键词
Weissella; Exopolysaccharide; Capsular polysaccharide; Dextran; Inulin; Levan
资金
- Swiss Confederation Innovation Promotion Agency (CTI) [10276]
- Academy of Finland [255755]
- Academy of Finland (AKA) [255755, 255755] Funding Source: Academy of Finland (AKA)
With their broad functional properties, lactic acid bacteria derived high molar mass exopolysaccharides (EPS) and oligosaccharides are of great interest for food, medical and pharmaceutical industry. EPS formation by 123 strains of Weissella cibaria and Weissella confusa, was evaluated. Dextran formation from sucrose was observed for all tested strains while 18 strains produced fructan in addition to dextran. Six isolates synthesized a highly ropy polymer from glucose associated with the formation of a cellbound, capsular polysaccharide (CPS) composed of glucose, O-acetyl groups and two unidentified monomer components. The soluble EPSs of nine strains were identified as low alpha-1,3-branched dextran, levan and inulin type polymers using NMR. In addition to glucan and fructan, W. confusa produced gluco- and fructooligosaccharides. Partial dextransucrase and fructansucrase sequences were characterized in the selected Weissella strains. Our study reports the first structural characterization of fructan type EPS from Weissella as well as the first Weissella strain producing inulin. Production of more than one EPS-type by single strains may have high potential for development of applications combining EPS technological and nutritional benefits. (C) 2014 Elsevier Ltd. All rights reserved.
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