Cui Yanhua, Jiang Xu, Hao Mengyuan, Qu Xiaojun, Hu Tong
Department of Food Science and Engineering, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150090, People's Republic of China.
Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin, 150010, People's Republic of China.
Arch Microbiol. 2017 Aug;199(6):799-809. doi: 10.1007/s00203-017-1366-1. Epub 2017 Mar 29.
Streptococcus thermophilus is the most important thermophilic dairy starter, and is widely used in the dairy industry. Streptococcus thermophilus exopolysaccharides received wide attention over recent decades, because they can improve the properties of the dairy product and confer beneficial health effects. The understanding of the regulatory and biosynthetic mechanisms of EPS will improve the EPS biosynthesis, increase the productivity of EPSs, and develop EPSs with desirable properties. The structure of EPSs is the focus of this study. Revealing the structure-function relationship can lead to increase the knowledge base and from there to increased research of EPS. The EPS yield is a key limiting factor in the research and utilization of EPS. In the present review, biosynthetic pathways and genetics of S. thermophilus EPSs were described and reviewed. At the same time, functional properties and applications of EPS, and strategies for enhancement of EPS production are discussed.
嗜热链球菌是最重要的嗜热型乳制品发酵剂，在乳制品工业中广泛应用。近几十年来，嗜热链球菌胞外多糖受到广泛关注，因为它们可以改善乳制品的特性并赋予有益的健康功效。对胞外多糖调控和生物合成机制的了解将改善胞外多糖的生物合成，提高胞外多糖的产量，并开发具有理想特性的胞外多糖。胞外多糖的结构是本研究的重点。揭示结构 - 功能关系可以增加知识储备，并在此基础上加强对胞外多糖的研究。胞外多糖产量是胞外多糖研究与利用的关键限制因素。在本综述中，描述并综述了嗜热链球菌胞外多糖的生物合成途径和遗传学。同时，还讨论了胞外多糖的功能特性与应用，以及提高胞外多糖产量的策略。
