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Production and characterization of the exopolysaccharide from strain Paenibacillus polymyxa 2020статья
- Авторы: Liyaskina Elena V., Rakova Nadezhda A., Kitykina Alevtina A., Rusyaeva Valentina V., Toukach Philip V., Fomenkov Alexey, Vainauskas Saulius, Roberts Richard J., Revin Victor V.
- Журнал: PLoS ONE
- Том: 16
- Номер: 7
- Год издания: 2021
- Издательство: Public Library of Science
- Местоположение издательства: United States
- Номер статьи: e0253482
- DOI: 10.1371/journal.pone.0253482
- Аннотация: Paenibacillus spp. exopolysaccharides (EPSs) have become a growing interest recently as a source of biomaterials. In this study, we characterized Paenibacillus polymyxa 2020 strain, which produces a large quantity of EPS (up to 68 g/L),and was isolated from wasp honeycombs. Here we report its complete genome sequence and full methylome analysis detected by Pacific Biosciences SMRT sequencing. Moreover, bioinformatic analysis identified a putative levan synthetic operon. SacC and sacB genes have been cloned and their products identified as glycoside hydrolase and levansucrase respectively. The Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectra demonstrated that the EPS is a linear β-(2→6)-linked fructan (levan). The structure and properties of levan polymer produced from sucrose and molasses were analyzed by FT-IR, NMR, scanning electron microscopy (SEM), high performance size exclusion chromatography (HPSEC), thermogravimetric analysis (TGA), cytotoxicity tests and showed low toxicity and high biocompatibility. Thus, P. polymyxa 2020 could be an exceptional cost-effective source for the industrial production of levan-type EPSs and to obtain functional biomaterials based on it for a broad range of applications, including bioengineering.
- Добавил в систему: Тоукач Филипп Владимирович