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Biosynthesis, Regulation and Application of Microbial Polysaccharides
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Biosynthesis, Regulation and Application of Microbial Polysaccharides

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Biotechnology".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 5167

Special Issue Editors

Prof. Dr. Peipei Han

E-Mail Website
Guest Editor
State Key Laboratory of Food Nutrition and Safety, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
Interests: microbial polysaccharides; fermentation production of natural food ingredients; microalgae; microbial technology
Special Issues, Collections and Topics in MDPI journals
Dr. Yang Wang

E-Mail Website
Guest Editor
The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
Interests: microbial polysaccharides; synthetic biology; membrane protein engineering

Special Issue Information

Dear Colleagues,

Polysaccharides have attracted great attention from the medical and food industries as bioactive ingredients and food additives. Microbial polysaccharides comprise a large number of versatile biopolymers produced by several bacteria, yeast and fungi. The advantages of microbial polysaccharides over plant polysaccharides include their novel functions and constant chemical and physical properties. In order to efficiently improve the production of microbial polysaccharides, it is urgent to reveal the biosynthesis, regulation mechanism of microbial polysaccharides. As another concern, the current application of microbial polysaccharides is still limited. Hence, the potential application of microbial polysaccharides in different fields needs to be assessed in order to expand the range of applications.

Prof. Dr. Peipei Han
Dr. Yang Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Foods is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • microbial polysaccharides
  • biosynthesis
  • regulation
  • biological activity
  • extracellular polysaccharide
  • fermentation

Published Papers (3 papers)

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Research

14 pages, 2862 KiB  
Article
Salicylic Acid and Jasmonic Acid Increase the Polysaccharide Production of Nostoc flagelliforme via the Regulation of the Intracellular NO Level
by Cheng-Feng Han, Shu-Ting Liu, Rong-Rong Yan, Jian Li, Ni Chen, Le-Le Zhang, Shi-Ru Jia and Pei-Pei Han
Foods 2023, 12(5), 915; https://doi.org/10.3390/foods12050915 - 21 Feb 2023
Cited by 3 | Viewed by 1230
Abstract
To significantly improve the polysaccharide production of Nostoc flagelliforme, a total of 12 chemicals were evaluated for their effects on polysaccharide accumulation. The results showed that salicylic acid and jasmonic acid increased the accumulation of the polysaccharides in N. flagelliforme significantly, by [...] Read more.
To significantly improve the polysaccharide production of Nostoc flagelliforme, a total of 12 chemicals were evaluated for their effects on polysaccharide accumulation. The results showed that salicylic acid and jasmonic acid increased the accumulation of the polysaccharides in N. flagelliforme significantly, by more than 20%. Three polysaccharides, namely control-capsule polysaccharide, salicylic acid-capsule polysaccharide, and jasmonic acid-capsule polysaccharide, were extracted and purified from N. flagelliforme under normal, salicylic acid, and jasmonic acid culture conditions, respectively. Their chemical compositions slightly differed regarding the total sugar and uronic acid contents, with average molecular weights of 2.06 × 103, 2.16 × 103 and 2.04 × 103 kDa, respectively. They presented similar Fourier transform infrared spectra and no significant difference in antioxidant activity. It was revealed that the salicylic acid and jasmonic acid significantly increased the level of nitric oxide. By investigating the effects of the exogenous nitric oxide scavenger and nitric oxide donor on the nitric oxide levels and polysaccharide yield of N. flagelliforme, the results showed that the increase in intracellular nitric oxide levels might be an important factor promoting the accumulation of polysaccharides. These findings provide a theoretical foundation for enhancing the yield of secondary metabolites by regulating the intracellular nitric oxide levels. Full article
(This article belongs to the Special Issue Biosynthesis, Regulation and Application of Microbial Polysaccharides)
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14 pages, 5841 KiB  
Article
Area Gene Regulates the Synthesis of β-Glucan with Antioxidant Activity in the Aureobasidium pullulans
by Kai Zhang, Wei Zhou, Wan Wang, Shanshan Zhao, Congyu Lin, Xin Ru, Jiaqi Guan, Hua Cong and Qian Yang
Foods 2023, 12(3), 660; https://doi.org/10.3390/foods12030660 - 3 Feb 2023
Cited by 6 | Viewed by 2001
Abstract
The ability of the fungus to regulate metabolism on various nitrogen sources makes it survive and metabolize in different environments. The biomass and the β-glucan yield of Aureobasidium pullulans are closely associated with the nitrogen source. This study found the only GATA nitrogen [...] Read more.
The ability of the fungus to regulate metabolism on various nitrogen sources makes it survive and metabolize in different environments. The biomass and the β-glucan yield of Aureobasidium pullulans are closely associated with the nitrogen source. This study found the only GATA nitrogen source activation regulating factor Area in HIT-LCY3. In order to testify the Area function, we amplified its conserved domain to build a silencing vector and used the RNAi to obtain the Area silent strain, and then explored its effect on the phenotype of A. pullulans and the yield of β-glucan. We found that the biomass and β-glucan yield of the silent strain decreased significantly after culturing with different nitrogen sources, in particular when using sodium nitrate and glutamate as the source. However, the β-glucan yield increased significantly after overexpression of Area, reaching 5.2 g/L when glutamine was the nitrogen source. In addition, the strain morphology changed as well under different nitrogen sources. At last, we investigated the antioxidant activity in vitro of β-glucan and found that it has a significant clearance effect on OH·, DPPH·, and ABTS·, being best with ABTS. Therefore, this study believed that the Area gene has a certain regulation function on the synthesis of β-glucan with antioxidant activity. Full article
(This article belongs to the Special Issue Biosynthesis, Regulation and Application of Microbial Polysaccharides)
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18 pages, 5353 KiB  
Article
Transcriptomics and Metabolomics Analysis of Sclerotium rolfsii Fermented with Differential Carbon Sources
by Jia Song, Yu Qiu, Rui Zhao, Jiayi Hou, Linna Tu, Zhiqiang Nie, Jianxin Wang, Yu Zheng and Min Wang
Foods 2022, 11(22), 3706; https://doi.org/10.3390/foods11223706 - 18 Nov 2022
Cited by 1 | Viewed by 1335
Abstract
Scleroglucan is obtained from Sclerotium rolfsii and is widely used in many fields. In this study, transcriptomics combined with metabolomics were used to study the global metabolites and gene changes. The results of the joint analysis showed that the DEGs (differentially expressed genes) [...] Read more.
Scleroglucan is obtained from Sclerotium rolfsii and is widely used in many fields. In this study, transcriptomics combined with metabolomics were used to study the global metabolites and gene changes. The results of the joint analysis showed that the DEGs (differentially expressed genes) and DEMs (differentially expressed metabolites) of SEPS_48 (fermented with sucrose as a carbon source for 48 h) and GEPS_48 (fermented with glucose as a carbon source for 48 h) comparison groups were mainly related to cell metabolism, focusing on carbohydrate metabolism, amino acid metabolism, and amino sugar and nucleoside sugar metabolism. We therefore hypothesized that the significant differences in these metabolic processes were responsible for the differences in properties. Moreover, the joint analysis provides a scientific theoretical basis for fungal polysaccharides biosynthesis and provides new insights into the effects of carbon sources on the production. As an excellent bioenergy and biological product, scleroglucan can be better applied in different fields, such as the food industry. Full article
(This article belongs to the Special Issue Biosynthesis, Regulation and Application of Microbial Polysaccharides)
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