Adelaide Braga, Ana Benedita Maia, Daniela Gomes, Joana L. Rodrigues, João Rainha, Lígia R. Rodrigues
{"title":"通过删除 Zymomonas mobilis 中的 sacC 基因提高果寡糖产量:提高益生菌生产的新方法","authors":"Adelaide Braga, Ana Benedita Maia, Daniela Gomes, Joana L. Rodrigues, João Rainha, Lígia R. Rodrigues","doi":"10.1007/s11947-024-03508-8","DOIUrl":null,"url":null,"abstract":"<p>Fructooligosaccharides (FOS) are promising prebiotics in the relevant and increasing market of functional food. Industrially, these compounds are produced from sucrose by the action of fructosyltransferase or b-fructofuranosidase enzymes. However, this process often yields low conversion rates and results in impure mixtures due to the release of high levels of glucose. <i>Zymomonas mobilis</i> is a well-known ethanol-producing bacterium with native levansucrase enzymes able to convert sucrose into FOS. This study aimed to use synthetic biology tools to eliminate invertase (<i>sacC</i>) activity in <i>Z. mobilis</i>, reducing substrate competition and maximizing FOS production. Additionally, we explored the potential use of agro-industrial by-products, such as sugarcane molasses (M) and corn step liquor (CSL), as nutrients for FOS production using <i>Z. mobilis</i> in an in vivo bioprocess strategy. Invertase deletion from the <i>Z. mobilis</i> ZM4 genome was accomplished by homologous recombination of an engineered suicide plasmid. Using <i>Z. mobilis sacC</i><sup><i>−</i></sup>, we observed a 70% reduction in monosaccharide production and a 9.0-fold increase in levan formation compared to the wild-type strain. Implementation of a fed-batch approach with CSL and molasses (CSLM) medium at flask-scale allowed to produce 41.9 g L<sup>−1</sup> of FOS (0.25 g<sub>FOS</sub> g<sub>sucrose</sub><sup>−1</sup>). To our knowledge, this work describes for the first time the production of FOS from agro-waste residues using a genetically modified <i>Z. mobilis</i> strain in a one-step fermentation. Through this innovative approach, we aim to contribute to the advancement of biotechnological strategies for prebiotic production, offering insights into genetic engineering techniques for improving the efficiency and sustainability of FOS synthesis in <i>Z. mobilis</i>.\n</p>","PeriodicalId":562,"journal":{"name":"Food and Bioprocess Technology","volume":"80 1","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improving Fructooligosaccharide Production via sacC Gene Deletion in Zymomonas mobilis: A Novel Approach for Enhanced Prebiotic Production\",\"authors\":\"Adelaide Braga, Ana Benedita Maia, Daniela Gomes, Joana L. Rodrigues, João Rainha, Lígia R. Rodrigues\",\"doi\":\"10.1007/s11947-024-03508-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Fructooligosaccharides (FOS) are promising prebiotics in the relevant and increasing market of functional food. Industrially, these compounds are produced from sucrose by the action of fructosyltransferase or b-fructofuranosidase enzymes. However, this process often yields low conversion rates and results in impure mixtures due to the release of high levels of glucose. <i>Zymomonas mobilis</i> is a well-known ethanol-producing bacterium with native levansucrase enzymes able to convert sucrose into FOS. This study aimed to use synthetic biology tools to eliminate invertase (<i>sacC</i>) activity in <i>Z. mobilis</i>, reducing substrate competition and maximizing FOS production. Additionally, we explored the potential use of agro-industrial by-products, such as sugarcane molasses (M) and corn step liquor (CSL), as nutrients for FOS production using <i>Z. mobilis</i> in an in vivo bioprocess strategy. Invertase deletion from the <i>Z. mobilis</i> ZM4 genome was accomplished by homologous recombination of an engineered suicide plasmid. Using <i>Z. mobilis sacC</i><sup><i>−</i></sup>, we observed a 70% reduction in monosaccharide production and a 9.0-fold increase in levan formation compared to the wild-type strain. Implementation of a fed-batch approach with CSL and molasses (CSLM) medium at flask-scale allowed to produce 41.9 g L<sup>−1</sup> of FOS (0.25 g<sub>FOS</sub> g<sub>sucrose</sub><sup>−1</sup>). To our knowledge, this work describes for the first time the production of FOS from agro-waste residues using a genetically modified <i>Z. mobilis</i> strain in a one-step fermentation. 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Improving Fructooligosaccharide Production via sacC Gene Deletion in Zymomonas mobilis: A Novel Approach for Enhanced Prebiotic Production
Fructooligosaccharides (FOS) are promising prebiotics in the relevant and increasing market of functional food. Industrially, these compounds are produced from sucrose by the action of fructosyltransferase or b-fructofuranosidase enzymes. However, this process often yields low conversion rates and results in impure mixtures due to the release of high levels of glucose. Zymomonas mobilis is a well-known ethanol-producing bacterium with native levansucrase enzymes able to convert sucrose into FOS. This study aimed to use synthetic biology tools to eliminate invertase (sacC) activity in Z. mobilis, reducing substrate competition and maximizing FOS production. Additionally, we explored the potential use of agro-industrial by-products, such as sugarcane molasses (M) and corn step liquor (CSL), as nutrients for FOS production using Z. mobilis in an in vivo bioprocess strategy. Invertase deletion from the Z. mobilis ZM4 genome was accomplished by homologous recombination of an engineered suicide plasmid. Using Z. mobilis sacC−, we observed a 70% reduction in monosaccharide production and a 9.0-fold increase in levan formation compared to the wild-type strain. Implementation of a fed-batch approach with CSL and molasses (CSLM) medium at flask-scale allowed to produce 41.9 g L−1 of FOS (0.25 gFOS gsucrose−1). To our knowledge, this work describes for the first time the production of FOS from agro-waste residues using a genetically modified Z. mobilis strain in a one-step fermentation. Through this innovative approach, we aim to contribute to the advancement of biotechnological strategies for prebiotic production, offering insights into genetic engineering techniques for improving the efficiency and sustainability of FOS synthesis in Z. mobilis.
期刊介绍:
Food and Bioprocess Technology provides an effective and timely platform for cutting-edge high quality original papers in the engineering and science of all types of food processing technologies, from the original food supply source to the consumer’s dinner table. It aims to be a leading international journal for the multidisciplinary agri-food research community.
The journal focuses especially on experimental or theoretical research findings that have the potential for helping the agri-food industry to improve process efficiency, enhance product quality and, extend shelf-life of fresh and processed agri-food products. The editors present critical reviews on new perspectives to established processes, innovative and emerging technologies, and trends and future research in food and bioproducts processing. The journal also publishes short communications for rapidly disseminating preliminary results, letters to the Editor on recent developments and controversy, and book reviews.