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Niu C, Lv W, Zhu X, Dong Z, Yuan K, Jin Q, Zhang P, Li P, Mao M, Dong T, Chen Z, Luo J, Hou L, Zhang C, Hao K, Chen S, Huang Z. Intestinal Translocation of Live Porphyromonas gingivalis Drives Insulin Resistance. J Dent Res 2024; 103:197-207. [PMID: 38185909 DOI: 10.1177/00220345231214195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024] Open
Abstract
Periodontitis has been emphasized as a risk factor of insulin resistance-related systemic diseases. Accumulating evidence has suggested a possible "oral-gut axis" linking oral infection and extraoral diseases, but it remains unclear whether periodontal pathogens can survive the barriers of the digestive tract and how they play their pathogenic roles. The present study established a periodontitis mouse model through oral ligature plus Porphyromonas gingivalis inoculation and demonstrated that periodontitis aggravated diet-induced obesity and insulin resistance, while also causing P. gingivalis enrichment in the intestine. Metabolic labeling strategy validated that P. gingivalis could translocate to the gastrointestinal tract in a viable state. Oral administration of living P. gingivalis elicited insulin resistance, while administration of pasteurized P. gingivalis had no such effect. Combination analysis of metagenome sequencing and nontargeted metabolomics suggested that the tryptophan metabolism pathway, specifically indole and its derivatives, was involved in the pathogenesis of insulin resistance caused by oral administration of living P. gingivalis. Moreover, liquid chromatography-high-resolution mass spectrometry analysis confirmed that the aryl hydrocarbon receptor (AhR) ligands, mainly indole acetic acid, tryptamine, and indole-3-aldehyde, were reduced in diet-induced obese mice with periodontitis, leading to inactivation of AhR signaling. Supplementation with Ficz (6-formylindolo (3,2-b) carbazole), an AhR agonist, alleviated periodontitis-associated insulin resistance, in which the restoration of gut barrier function might play an important role. Collectively, these findings reveal that the oral-gut translocation of viable P. gingivalis works as a fuel linking periodontitis and insulin resistance, in which reduction of AhR ligands and inactivation of AhR signaling are involved. This study provides novel insight into the role of the oral-gut axis in the pathogenesis of periodontitis-associated comorbidities.
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Affiliation(s)
- C Niu
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - W Lv
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, P. R. China
| | - X Zhu
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - Z Dong
- Department of Oral Implantology, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, P. R. China
| | - K Yuan
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - Q Jin
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - P Zhang
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - P Li
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - M Mao
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - T Dong
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - Z Chen
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - J Luo
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
| | - L Hou
- Department of Nursing, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, P. R. China
| | - C Zhang
- Department of Oral Implantology, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, P. R. China
| | - K Hao
- Department of Oral Implantology, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, P. R. China
| | - S Chen
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, P. R. China
- Department of Oral Implantology, Shanghai Stomatological Hospital & School of Stomatology, Fudan University, Shanghai, P. R. China
| | - Z Huang
- Department of Endodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, P. R. China
- College of Stomatology, Shanghai Jiao Tong University, Shanghai, P. R. China
- National Clinical Research Center for Oral Diseases, National Center for Stomatology, Shanghai, P. R. China
- Shanghai Key Laboratory of Stomatology, Shanghai, P. R. China
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Niu C, Liu G, Yang S, He L, Liu C, Zheng F, Wang J, Li Q. Enhanced expression of a novel trypsin from Streptomyces fradiae in Komagataella phaffii GS115 through combinational strategies of propeptide engineering and self-degredation sites modification. Int J Biol Macromol 2024; 254:127382. [PMID: 37838138 DOI: 10.1016/j.ijbiomac.2023.127382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/09/2023] [Accepted: 10/09/2023] [Indexed: 10/16/2023]
Abstract
This study aimed to enhance the expression level of a novel trypsin gene from Streptomyces fradiae ATCC14544 in Komagataella phaffii GS115 through the combinational use of propeptide engineering and self-degradation residues modification strategies. An artificial propeptide consisted of thioredoxin TrxA, the bovine propeptide DDDDK and the hydrophobic peptide FVEF was introduced to replace the original propeptide while the self-degradation residue sites were predicted and analyzed through alanine screening. The results showed that the quantity and enzymatic activity of asft with engineered propeptide reached 47.02 mg/mL and 33.9 U/mL, which were 9.6 % and 59.29 % higher than those of wild-type (42.9 mg/mL and 13.8 U/mL). Moreover, the introduction of R295A/R315A mutation further enhanced the enzymatic activity (58.86 U/mL) and obviously alleviated the phenomena of self-degradation. The tolerance of trypsin towards alkaline environment was also improved since the optimal pH was shifted from pH 9.0 to pH 9.5 and the half-life value at pH 10 was significantly extended. Finally, the fermentation media composition and condition were optimized and trypsin activity in optimal condition reached 160.58 U/mL, which was 2.73-fold and 11.64-fold of that before optimization or before engineering. The results obtained in this study indicated that the combinational use of propeptide engineering and self-degradation sites modification might have great potential application in production of active trypsins.
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Affiliation(s)
- Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Guozheng Liu
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Shijing Yang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Linman He
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
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Niu C, Xing X, Wang Y, Li X, Zheng F, Liu C, Wang J, Li Q. Characterization of color, metabolites and microbial community dynamics of doubanjiang during constant temperature fermentation. Food Res Int 2023; 174:113554. [PMID: 37986515 DOI: 10.1016/j.foodres.2023.113554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/16/2023] [Accepted: 10/01/2023] [Indexed: 11/22/2023]
Abstract
This study aimed to elaborate the effect of temperature on doubanjiang fermentation. Two batches of constant-temperature groups were prepared and their physicochemical parameters, color formation, metabolites and microbial community dynamics during fermentation were determined and compared with those of natural temperature fermentation group. The results showed that fermentation at 40 °C could accelerate the accumulation of amino nitrogen, reducing sugar, amino acids, organic acids and various volatile metabolites while it was able to inhibit the growth of conditionally pathogenic bacteria, such as Klebsiella and Salmonella. However, high concentrations of total acids and biogenic amines, protrusive burnt flavor and darker color were observed in constant temperature fermentation, which were unfavorable for doubanjiang quality. Higher fermentation temperature lowered the diversity of bacterial community and favored the growth of Bacillus genus. The correlation between key microbial genera and doubanjiang quality indexes were significantly different among different temperatures. This study would deep our understanding of the roles of temperature ondoubanjiangfermentation.
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Affiliation(s)
- Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xianlei Xing
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Yiheng Wang
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiaoyang Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
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Chen H, Li Q, Wang J, Niu C, Zheng F, Liu C. Improving ribonucleic acid production in Saccharomyces pastorianus via in silico genome-scale metabolic network model. Biotechnol J 2023; 18:e2300240. [PMID: 37522392 DOI: 10.1002/biot.202300240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/12/2023] [Accepted: 07/30/2023] [Indexed: 08/01/2023]
Abstract
Ribonucleic acid (RNA) and its degradation products are important biomolecules widely used in the food and pharmaceutical industries for their flavoring and nutritional functions. In this study, we used a genome-scale metabolic network model (GSMM) to explore genetic targets for nucleic acid synthesis in a Saccharomyces pastorianus strain (G03). Yeast 8.5.0 was used as the base model, which accurately predicted G03's growth. Using OptForce, we found that overexpression of ARO8 and ATP1 among six different strategies increased the RNA content of G03 by 58.0% and 74.8%, respectively. We also identified new metabolic targets for improved RNA production using a modified GSMM called TissueModel, constructed using the GIMME transcriptome constraint tool to remove low-expressed reactions in the model. After running OptKnock, the RNA content of G03-△BNA1 and G03-△PMA1 increased by 44.6% and 39.8%, respectively, compared to G03. We suggest that ATP1, ARO8, BNA1, and PMA1 regulate cell fitness, which affects RNA content. This study is the first to identify strategies for RNA overproduction using GSMM and to report that regulation of ATP1, ARO8, BNA1, and PMA1 can increase RNA content in S. pastorianus. These findings also provide valuable knowledge on model reconstruction for S. pastorianus.
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Affiliation(s)
- Hao Chen
- Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu, China
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Cheng W, Hou Q, Liu C, Niu C, Zheng F, Li Q, Wang J. [Effect of mitophagy related genes on the antioxidant properties of Saccharomyces cerevisiae]. Sheng Wu Gong Cheng Xue Bao 2023; 39:3464-3480. [PMID: 37622373 DOI: 10.13345/j.cjb.220860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Mitophagy is a process whereby cells selectively remove mitochondria through the mechanism of autophagy, which plays an important role in maintaining cellular homeostasis. In order to explore the effect of mitophagy genes on the antioxidant activities of Saccharomyces cerevisiae, mutants with deletion or overexpression of mitophagy genes ATG8, ATG11 and ATG32 were constructed respectively. The results indicated that overexpression of ATG8 and ATG11 genes significantly reduced the intracellular reactive oxygen species (ROS) content upon H2O2 stress for 6 h, which were 61.23% and 46.35% of the initial state, respectively. Notable, overexpression of ATG8 and ATG11 genes significantly increased the mitochondrial membrane potential (MMP) and ATP content, which were helpful to improve the antioxidant activities of the strains. On the other hand, deletion of ATG8, ATG11 and ATG32 caused mitochondrial damage and significantly decreased cell vitality, and caused the imbalance of intracellular ROS. The intracellular ROS content significantly increased to 174.27%, 128.68%, 200.92% of the initial state, respectively, upon H2O2 stress for 6 h. The results showed that ATG8, ATG11 and ATG32 might be potential targets for regulating the antioxidant properties of yeast, providing a new clue for further research.
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Affiliation(s)
- Wanqi Cheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qianyao Hou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
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Ye K, Wu H, Liu C, Niu C, Zheng F, Li Q, Wang J. [Manipulation of isocitrate dehydrogenase genes affects the anti-autolytic ability of lager yeast]. Sheng Wu Gong Cheng Xue Bao 2023; 39:3451-3463. [PMID: 37622372 DOI: 10.13345/j.cjb.220790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
Yeast autolysis affects the flavor and quality of beer. The regulation of yeast autolysis is a need for industrial beer production. Previous studies on brewer's yeast autolysis showed that the citric acid cycle-related genes had a great influence on yeast autolysis. To explore the contribution of isocitrate dehydrogenase genes in autolysis, the IDP1 and IDP2 genes were destroyed or overexpressed in typical lager yeast Pilsner. The destruction of IDP1 gene improved the anti-autolytic ability of yeast, and the anti-autolytic index after 96 h autolysis was 8.40, 1.5 times higher than that of the original strain. The destruction of IDP1 gene increased the supply of nicotinamide adenine dinucleotide phosphate (NADPH) and the NADPH/NADP+ ratio was 1.94. After fermentation, intracellular ATP level was 1.8 times higher than that of the original strain, while reactive oxygen species (ROS) was reduced by 10%. The destruction of IDP2 gene resulted in rapid autolysis and a decrease in the supply of NADPH. Anti-autolytic index after 96 h autolysis was 4.03 and the NADPH/NADP+ ratio was 0.89. After fermentation, intracellular ATP level was reduced by 8% compared with original strain, ROS was 1.3 times higher than that of the original strain. The results may help understand the regulation mechanism of citric acid cycle-related genes on yeast autolysis and provide a basis for the selection of excellent yeast with controllable anti-autolytic performance.
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Affiliation(s)
- Kejia Ye
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Haobo Wu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
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Guo WH, Zhu YJ, Haimiti G, Xie XR, Niu C, Li M, Shi J, Yin ZW, Yu MK, Ding JB, Zhang FB. Bioinformatics-based design of a fusion vaccine with CTLA-4 variable region to combat Brucella. Braz J Med Biol Res 2023; 56:e12938. [PMID: 37493775 PMCID: PMC10361638 DOI: 10.1590/1414-431x2023e12938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 06/16/2023] [Indexed: 07/27/2023] Open
Abstract
Brucellosis has become a global zoonotic disease, seriously endangering the health of people all over the world. Vaccination is an effective strategy for protection against Brucella infection in livestock in developed countries. However, current vaccines are pathogenic to humans and pregnant animals, which limits their use. Therefore, it is very important to improve the safety and immune protection of Brucella vaccine. In this study, different bioinformatics approaches were carried out to predict the physicochemical properties, T/B epitope, and tertiary structure of Omp2b and Omp31. Then, these two proteins were sequentially linked, and the Cytotoxic T lymphocyte associated antigen-4 (CTLA-4) variable region was fused to the N-terminal of the epitope sequence. In addition, molecular docking was performed to show that the structure of the fusion protein vaccine had strong affinity with B7 (B7-1, B7-2). This study showed that the designed vaccine containing CTLA-4 had high potency against Brucella, which could provide a reference for the future development of efficient brucellosis vaccines.
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Affiliation(s)
- W H Guo
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Y J Zhu
- Department of Reproductive Assistance, Center for Reproductive Medicine, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - G Haimiti
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - X R Xie
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - C Niu
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - M Li
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - J Shi
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Z W Yin
- The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - M K Yu
- School of Life Science and Technology, Southeast University, Nanjing, China
| | - J B Ding
- Department of Clinical Laboratory, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of Central Asian High Incidence Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - F B Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
- State Key Laboratory of Pathogenesis, Prevention, and Treatment of Central Asian High Incidence Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
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Hou D, Xu X, Wang J, Liu C, Niu C, Zheng F, Li Q. Effect of environmental stresses during fermentation on brewing yeast and exploration on the novel flocculation-associated function of RIM15 gene. Bioresour Technol 2023; 379:129004. [PMID: 37004888 DOI: 10.1016/j.biortech.2023.129004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 05/03/2023]
Abstract
Flocculation of brewer's yeast is an environment-friendly and cost-effective way to separate yeast cells from fermentation broth for subsequent production. Diverse genetic background and complex fermentation environment cause difficulty to explore flocculation mechanism and regulate yeast flocculation. In this study, comparative transcriptome analysis was carried out between an industrial brewing yeast and its flocculation-enhanced mutant strain, unveiling the differentially-expressed genes were enriched in response to stresses. The expression level of Lg-FLO1 was the highest among all FLO genes. Environmental stresses of fermentation were simulated to stimulated yeast cells and it was found that nitrogen and amino acid starvation promoted the process of flocculation. It is the first time to reveal the nutrient-responsive gene RIM15 has a novel genetic function regulating flocculation. The study provides novel direction and strategies to manage yeast flocculation and achieve effective cell utilization in fermentation.
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Affiliation(s)
- Dan Hou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.
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9
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Zhao S, Niu C, Wang Y, Zan Y, Zheng F, Liu C, Wang J, Li Q. Revealing the Succession of Spatial Heterogeneity of the Microbial Community during Broad Bean Paste Fermentation. Appl Environ Microbiol 2023:e0062123. [PMID: 37306603 PMCID: PMC10370304 DOI: 10.1128/aem.00621-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023] Open
Abstract
This study aimed to elaborate the assembly processes and metabolic regulation of the microbial community under the conditions of environmental factors and artificial intervention using broad bean paste (BBP) fermentation as a tractable research object. Spatial heterogenicity of amino acid nitrogen, titratable acidity, and volatile metabolites were observed between upper and lower layers after fermentation for 2 weeks. Amino nitrogen contents in the upper fermented mash reached 0.86, 0.93, and 1.06 g/100 g at 2, 4, and 6 weeks, respectively, which were significantly higher than those of mash located at the lower layer (0.61, 0.79, and 0.78 g/100 g). Moreover, higher concentrations of titratable acidity were accumulated in upper layers (2.05, 2.25 and 2.56 g/100g) than those in lower layers, and the differentiation of volatile metabolites was the greatest (R = 0.543) at 36 days, after which the BBP flavor profiles converged with the fermentation progress. The successive heterogenicity of the microbial community in the mid-late stage was also found during fermentation, and Zygosaccharomyces, Staphylococcus, and Bacillus had heterogeneous characteristics driven by sunlight, water activity, and microbial interactions. This study provided new insights into the mechanisms underlying the succession and assembly of the microbial community of BBP fermentation, which also laid new clues for researches of the microbial communities in complex ecosystems. IMPORTANCE Gaining insights into the community assembly processes is essential and valuable for the elaboration of underlying ecological patterns. However, current studies about microbial community succession in multispecies fermented food usually treat the research object as a whole, are focused exclusively on temporal dimensions, and have ignored the changes of community structure in spatial dimensions. Therefore, dissecting the community assembly process from the view of spatiotemporal dimensions will be a more comprehensive and detailed perspective. Here, we found the heterogenicity of the BBP microbial community under the traditional production technology from spatial and temporal scales, systematically analyzed the relationship between the spatiotemporal succession of community and the difference of BBP quality, and elucidated the roles of environmental factors and microbial interactions to drive the heterogeneous succession of the microbial community. Our findings provide a new insight into understanding the association between microbial community assembly and the quality of BBP.
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Affiliation(s)
- Shuai Zhao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yiheng Wang
- School of Biotechnology, Jiangnan University, Wuxi, China
| | - Youlong Zan
- Anqing City Huyumei Brew Food Co., Ltd., Anqing, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
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10
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Zhao S, Niu C, Wang Y, Li X, Zheng F, Liu C, Wang J, Li Q. Revealing the contributions of sunlight-expose process and core-microbiota metabolism on improving the flavor profile during Doubanjiang fermentation. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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11
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Guan Y, Xu X, Liu C, Wang J, Niu C, Zheng F, Li Q. Evaluating the physiology and fermentation performance of the lager yeast during very high gravity brewing with increased temperature. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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12
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Niu C, Fu J, Zheng F, Liu C, Wang J, Li Q. Enhanced acidic stability of a Bacillus 1,3-1,4-β-glucanase through pH-based molecular dynamics simulation for efficient application in brewing industry. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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13
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Niu C, Xing X, Yang X, Zheng F, Liu C, Wang J, Li Q. Isolation, identification and application of Aspergillus oryzae BL18 with high protease activity as starter culture in doubanjiang (broad bean paste) fermentation. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Chen H, Wang J, Li Q, Xu X, Niu C, Zheng F, Liu C. Fed-Batch Fermentation of Saccharomyces pastorianus with High Ribonucleic Acid Yield. Foods 2022; 11:foods11182742. [PMID: 36140869 PMCID: PMC9497889 DOI: 10.3390/foods11182742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/05/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
(1) Background: The degradation products of ribonucleic acid (RNA)are widely used in the food and pharmaceutical industry for their flavoring and nutritional enhancement functions. Yeast is the main source for commercial RNA production, and an efficient strain is the key to reducing production costs; (2) Methods: A mutant Saccharomyces pastorianus G03H8 with a high RNA yield was developed via ARTP mutagenesis and fed-batch fermentation was applied to optimize production capacity. Genome sequencing analysis was used to reveal the underlying mechanism of higher RNA production genetic differences in the preferred mutant; (3) Results: Compared with the highest RNA content of the mutant strain, G03H8 increased by 40% compared with the parental strain G03 after response surface model optimization. Meanwhile, in fed-batch fermentation, G03H8′s dry cell weight (DCW) reached 60.58 g/L in 5 L fermenter by molasses flowing and RNA production reached up to 3.58 g/L. Genome sequencing showed that the ribosome biogenesis, yeast meiosis, RNA transport, and longevity regulating pathway were closely related to the metabolism of high RNA production; (4) Conclusion: S. pastorianus G03H8 was developed for RNA production and had the potential to greatly reduce the cost of RNA production and shorten the fermentation cycle. This work lays the foundation for efficient RNA content using S. pastorianus.
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Affiliation(s)
- Hao Chen
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Correspondence: ; Tel.: +86-0510-85918176
| | - Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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Liu C, Lu L, Yang C, Niu C, Wang J, Zheng F, Li Q. Effects of thermal treatment on alliin and its related sulfides during black garlic processing. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113158] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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16
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Zhao S, Niu C, Xing X, Fan L, Zheng F, Liu C, Wang J, Li Q. Revealing the changes of microbiota structure and function in broad bean paste mediated by sunlight and ventilation. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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17
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Wu Z, Wang J, Niu C, Liu C, Zheng F, Li Q. Transcriptomic and metabolomic analysis reveals genes related to stress tolerance in high gravity brewing. World J Microbiol Biotechnol 2022; 38:59. [DOI: 10.1007/s11274-021-03115-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 07/29/2021] [Indexed: 11/29/2022]
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18
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Liu C, Li M, Ren T, Wang J, Niu C, Zheng F, Li Q. Effect of Saccharomyces cerevisiae and non-Saccharomyces strains on alcoholic fermentation behavior and aroma profile of yellow-fleshed peach wine. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112993] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhou X, Suo J, Hou D, Liu C, Niu C, Zheng F, Li Q, Wang J. [Effect of RIM21 gene disruption on flocculation of lager yeast]. Sheng Wu Gong Cheng Xue Bao 2021; 37:4373-4381. [PMID: 34984882 DOI: 10.13345/j.cjb.200798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Lager yeast is the most popular yeast strain used for beer production in China. The flocculation of yeast plays an important role in cell separation at the end of fermentation. Therefore, appropriately enhancing the flocculation capability of the lager yeast without affecting its fermentation performance would be desirable for beer industry. Our previous study showed that the defect of gene RIM21 might contribute to the enhanced flocculation capability of a lager yeast G03. To further investigate the role of the RIM21 gene in flocculation of strain G03, this study constructed a RIM21-deleted mutant strain G03-RIM21Δ through homologous recombination. Deletion of RIM21 improved the flocculation capability of strain G03 during wort fermentation at 11 °C without changing its fermentation performance significantly. The expression of FLO5, Lg-FLO1 and some other genes involved in cell wall integrity pathway were up-regulated in strain G03-RIM21Δ. In addition, the disruption of RIM21 enhanced resistance of yeast cells to cell wall inhibitors. These results provide a basis for elucidating the flocculation mechanism of lager yeast under low-temperature fermentation conditions.
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Affiliation(s)
- Xuefei Zhou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jingyi Suo
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Dan Hou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
- Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
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Zhi X, Liu J, Wu S, Niu C. A generalized l 2,p-norm regression based feature selection algorithm. J Appl Stat 2021; 50:703-723. [PMID: 36819074 PMCID: PMC9930865 DOI: 10.1080/02664763.2021.1975662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Feature selection is an important data dimension reduction method, and it has been used widely in applications involving high-dimensional data such as genetic data analysis and image processing. In order to achieve robust feature selection, the latest works apply the l 2 , 1 or l 2 , p -norm of matrix to the loss function and regularization terms in regression, and have achieved encouraging results. However, these existing works rigidly set the matrix norms used in the loss function and the regularization terms to the same l 2 , 1 or l 2 , p -norm, which limit their applications. In addition, the algorithms for solutions they present either have high computational complexity and are not suitable for large data sets, or cannot provide satisfying performance due to the approximate calculation. To address these problems, we present a generalized l 2 , p -norm regression based feature selection ( l 2 , p -RFS) method based on a new optimization criterion. The criterion extends the optimization criterion of ( l 2 , p -RFS) when the loss function and the regularization terms in regression use different matrix norms. We cast the new optimization criterion in a regression framework without regularization. In this framework, the new optimization criterion can be solved using an iterative re-weighted least squares (IRLS) procedure in which the least squares problem can be solved efficiently by using the least square QR decomposition (LSQR) algorithm. We have conducted extensive experiments to evaluate the proposed algorithm on various well-known data sets of both gene expression and image data sets, and compare it with other related feature selection methods.
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Affiliation(s)
- X. Zhi
- School of Science, Xi'an University of Posts and Telecommunications, Xi'an, People's Republic of China
| | - J. Liu
- School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an, People's Republic of China,J. Liu
| | - S. Wu
- School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an, People's Republic of China
| | - C. Niu
- School of Communication and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an, People's Republic of China
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21
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Zhao S, Niu C, Suo J, Zan Y, Wei Y, Zheng F, Liu C, Wang J, Li Q. Unraveling the mystery of ‘bask in daytime and dewed at night’ technique in doubanjiang (broad bean paste) fermentation. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111723] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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22
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Antonarakis E, Piulats J, Gross-Goupil M, Goh J, Vaishampayan U, De Wit R, Alanko T, Fukasawa S, Tabata K, Feyerabend S, Berger R, Ojamaa K, Hoimes C, Sezer A, Omlin A, Yachnin J, Niu C, Poehlein C, Schloss C, de Bono J. 611P Pembrolizumab (pembro) monotherapy for docetaxel-pretreated metastatic castration-resistant prostate cancer (mCRPC): Updated analyses with 4 years of follow-up from cohorts 1-3 of the KEYNOTE-199 study. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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23
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Wang DH, Niu C, Dai JH, Tian DY. [CFTR gene variations and phenotypes in seven children]. Zhonghua Er Ke Za Zhi 2021; 59:689-694. [PMID: 34333923 DOI: 10.3760/cma.j.cn112140-20210112-00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the cystic fibrosis transmembrane conductance regulator (CFTR) gene variations and phenotypes in 7 Chinese children. Methods: In this retrospective study, the data of 7 children with CFTR gene variations admitted to Children's Hospital of Chongqing Medical University from December 2013 to October 2020 were extracted. The general information, clinical manifestations, gene variations, diagnosis and treatment were summarized. Results: Among the 7 children, 2 were males and 5 were females, aged 5.2(0.5-11.3) years. Main clinical manifestations included malnutrition (5 cases), recurrent respiratory infection (4 cases), bronchiectasis (3 cases), steatorrhea (3 cases), vomiting in infancy (2 cases), liver cirrhosis (2 cases), meconium ileus (1 case), metabolic alkalosis and hypochloremia (1 case). A total of 15 variations were found by whole exon sequencing and Sanger sequencing, among which 3 were newly discovered, and 7 were missense mutations. Four children were diagnosed as CF, and the other 3 were diagnosed as CFTR related disease (CFTR-RD). Compared with CF patients, the pancreatic insufficiency and typical CF lung disease were relatively mild in CFTR-RD patients. After treatment, 6 children were clinically improved, while the rest one withdrew treatment due to critical pulmonary infection and disturbance of water-electrolyte metabolism. Conclusions: The loci and phenotypes of CFTR gene variants vary hugely and the pathogenicity of some variations are not clear. Whole exon sequencing can facilitate the identification of CF-and CFTR-RD-causing variaions. For the cases not compatible with CF, CFTR-RD should be considered and evaluated by timely gene detection, so as to carry out appropriate long term management.
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Affiliation(s)
- D H Wang
- Department of Respiration, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - C Niu
- Department of Respiration, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - J H Dai
- Department of Respiration, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
| | - D Y Tian
- Department of Respiration, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing 400014, China
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Liu C, Zhu T, Song H, Niu C, Wang J, Zheng F, Li Q. Evaluation and prediction of the biogenic amines in Chinese traditional broad bean paste. J Food Sci Technol 2021; 58:2734-2748. [PMID: 34194109 PMCID: PMC8196132 DOI: 10.1007/s13197-020-04781-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 07/29/2020] [Accepted: 09/09/2020] [Indexed: 06/13/2023]
Abstract
Biogenic amines (BAs) are a threat to the safety of broad bean paste, and biosynthetic mechanism of BA and its regulation are unknown. This study aimed to assess microbial BA synthesis in Chinese traditional broad bean paste and determine favorable fermentation conditions for BA regulation. The BAs content in 27 pastes was within the safe range. 64 strains with potential decarboxylation were screened in Luria-Bertani Glycerol medium and identified as Bacillus spp. Although Bacillus amyloliquefaciens produced highest levels of BAs (70.14 ± 2.69 mg/L) in LBAA, Bacillus subtilis produced 6% more BAs than B. amyloliquefaciens. Meanwhile, temperature was the most remarkable factor affecting BAs production by B. amyloliquefaciens 1-13. Furthermore, the fermented broad bean paste model revealed that BA content increased by 61.2 mg/kg every 10 days at 45 °C, which was approximately threefold of that at 25 °C. An ARIMA prediction model of BAs content was constructed, and the total BAs content of 40 mg/100 g was set as the critical value. This study not only contributed to understanding the BAs formation mechanism, but also provided potential measures to control the BAs in fermented soybean products.
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Affiliation(s)
- Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
| | - Tianao Zhu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
| | - Haoyang Song
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
- Lab of Brewing Science and Engineering, Jiangnan University, No.1800, Lihu Road, Wuxi, 214122 JiangSu Province People’s Republic of China
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Xu X, Niu C, Liu C, Wang J, Zheng F, Li Q. Screening lager yeast with higher ethyl-acetate production by adaptive laboratory evolution in high concentration of acetic acid. World J Microbiol Biotechnol 2021; 37:125. [PMID: 34173085 DOI: 10.1007/s11274-021-03082-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 05/29/2021] [Indexed: 10/21/2022]
Abstract
Ethyl-acetate is important for the flavor and aroma of the alcoholic beverages, therefore, there have been extensive efforts toward increasing its production by engineering yeast strains. In this study, we reported a new approach to breed non-genetic modified producing yeast strain with higher ethyl-acetate production for beer brewing. First, we demonstrated the positive effect of higher acetic acid concentration on inducing the expression of acetyl-CoA synthetase (ACS). Then, we applied adaptive laboratory evolution method to evolve strain with higher expression level of ACS. As a result, we obtained several evolved strains with increased ACS expression level as well as ethyl-acetate production. In 3 L scale fermentation, the optimal strain EA60 synthesized more ethyl-acetate than M14 at the same time point. At the end of fermentation, the ethyl-acetate production in EA60 was 21.4% higher than M14, while the other flavor components except for acetic acid were changed in a moderate degree, indicating this strain had a bright prospect in industrial application. Moreover, this study also indicated that ACS1 played a more important role in increasing the acetic acid tolerance of yeast, while ACS2 contributed to the synthesis of cytosol acetyl-CoA, thereby facilitating the production of ethyl-acetate during fermentation.
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Affiliation(s)
- Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, NO.1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China.,Laboratory of Brewing Science and Engineering, Jiangnan University, Wuxi, 214000, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, NO.1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China.,Laboratory of Brewing Science and Engineering, Jiangnan University, Wuxi, 214000, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, NO.1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China.,Laboratory of Brewing Science and Engineering, Jiangnan University, Wuxi, 214000, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, NO.1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China.,Laboratory of Brewing Science and Engineering, Jiangnan University, Wuxi, 214000, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, NO.1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China.,Laboratory of Brewing Science and Engineering, Jiangnan University, Wuxi, 214000, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, NO.1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China. .,Laboratory of Brewing Science and Engineering, Jiangnan University, Wuxi, 214000, China.
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Zhou X, Suo J, Liu C, Niu C, Zheng F, Li Q, Wang J. Genome comparison of three lager yeasts reveals key genes affecting yeast flocculation during beer fermentation. FEMS Yeast Res 2021; 21:6284804. [PMID: 34037755 DOI: 10.1093/femsyr/foab031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 05/24/2021] [Indexed: 11/14/2022] Open
Abstract
Yeast flocculation plays an essential role in industrial application. Appropriate flocculation of yeast cells at the end of fermentation benefits the cell separation in production, which is an important characteristic of lager yeast for beer production. Due to the complex fermentation environment and diverse genetic background of yeast strains, it is difficult to explain the flocculation mechanism and find key genes that affect yeast flocculation during beer brewing. By analyzing the genomic mutation of two natural mutant yeasts with stronger flocculation ability compared to the parental strain, it was found that the mutated genes common in both mutants were enriched in protein processing in endoplasmic reticulum, membrane lipid metabolism and other pathways or biological processes involved in stress responses. Further functional verification of genes revealed that regulation of RIM101 and VPS36 played a role in lager yeast flocculation under the brewing condition. This work provided new clues for improving yeast flocculation in beer brewing.
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Affiliation(s)
- Xuefei Zhou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
| | - Jingyi Suo
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, 1800 Lihu Ave, Binhu District, Wuxi 214122, Jiangsu, China
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Niu C, Blaylock B, Niu C, Davidson HE, DePue R, Williams GR, Steinberg K. Development of Minimum Data Set-based Individualized Care Pathways for Chronic Obstructive Pulmonary Disease Treatment in Nursing Home Residents. J Am Med Dir Assoc 2021; 22:B20. [PMID: 34287165 DOI: 10.1016/j.jamda.2021.01.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Zheng F, Wang T, Niu C, Jia Y, Zheng R, Liu C, Wang J, Li Q. Proteomic Analysis of Hop Bitter Compound Iso-α-acid Tolerance in Beer Spoilage Lactobacillus casei 2-9-5. Journal of the American Society of Brewing Chemists 2021. [DOI: 10.1080/03610470.2020.1864710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Tianmu Wang
- School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Yun Jia
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Ruilong Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
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Yang Y, Niu C, Shan W, Zheng F, Liu C, Wang J, Li Q. Physicochemical, flavor and microbial dynamic changes during low-salt doubanjiang (broad bean paste) fermentation. Food Chem 2021; 351:128454. [PMID: 33652296 DOI: 10.1016/j.foodchem.2020.128454] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/29/2020] [Accepted: 10/19/2020] [Indexed: 01/06/2023]
Abstract
This study aimed to elaborate the roles of salt concentration on doubanjiang (broad bean paste) fermentation. Three sets of doubanjiang samples which had lower salt concentration than commercial doubanjiang were prepared and the physicochemical parameters, biogenic amines, flavor, microbial dynamics were analyzed during fermentation. The salt reduction showed significant effect on the dynamics of bacteria and fungi, thus leading to doubanjiang samples with different properties. Salt reduction during fermentation relieved the osmotic pressure towards microbes, which favored the accumulation of amino acid nitrogen, amino acids, and volatile flavor compounds. However, higher concentrations of total acids and biogenic amines and the existence of conditional pathogens, such as Klebsiella, Cronobacter and Acinetobacter genera, were observed in salt reduced doubanjiang samples, which was undesirable for doubanjiang quality. This study would deep our understanding of the roles of salt on doubanjiang fermentation.
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Affiliation(s)
- Yue Yang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Wanxiang Shan
- School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China; Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
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30
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Zhang M, Wang J, Niu C, Zheng F, Liu C, Li Q. Screening of thermosensitive autolytic mutant brewer’s yeast and transcriptomic analysis of heat stress response. Can J Microbiol 2020; 66:631-640. [DOI: 10.1139/cjm-2019-0456] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Brewer’s yeast has been widely used in the food industry, and the autolysates thereof are increasingly being studied for their valuable nutritional compositions. Yeast autolysis is most affected by medium composition and temperature. In this study, a thermosensitive autolytic brewer’s yeast P-510 was obtained with atmospheric and room temperature plasma mutagenesis plus 5-bromo-chloro-3-indolyl phosphate screening. The mutant rapidly autolyzed at 37 °C and the autolysates contained more active components and showed higher antioxidant activities compared with that of the parental strain, which indicated that the mutant’s autolysates can potentially be used as functional food and nutritional ingredients. Transcriptomic analysis of the mutant and parental strains at 28 and 37 °C suggested that thermosensitive autolysis of P-510 was probably caused by mitochondrial disfunction, glycogen metabolic flux of glycolysis and pentose phosphate pathway disorder, as well as hexose transport inhibition. The results revealed the important role of mitochondrial metabolism and glycogen utilization regulation in heat stress response of yeast.
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Affiliation(s)
- Mingfang Zhang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China; Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, P.R. China
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Zhao J, Niu C, Du S, Liu C, Zheng F, Wang J, Li Q. Reduction of biogenic amines formation during soybean paste fermentation by using Staphylococcus carnosus M43 and Pediococcus acidilactici M28 as starter culture. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109917] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Mao J, Niu C, Li K, Mobeen Tahir M, Khan A, Wang H, Li S, Liang Y, Li G, Yang Z, Zuo L, Han M, Ren X, An N, Zhang D. Exogenous 6-benzyladenine application affects root morphology by altering hormone status and gene expression of developing lateral roots in Malus hupehensis. Plant Biol (Stuttg) 2020; 22:1150-1159. [PMID: 32597557 DOI: 10.1111/plb.13154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Malus hupehensis is an extensively used apple rootstock in China. In the current study, M. hupehensis seedlings were treated with exogenous 2.2 µm 6-benzyladenine (6-BA) so as to investigate the mechanism by which 6-BA affects lateral root development. The results indicate that 6-BA treatment promotes elongation and thickening of both root and shoot in M. hupehensis, but reduces the number of lateral roots, as well as reducing the auxin level after 6-BA treatment. Moreover, MhAHK4, MhRR1 and MhRR2 were also significantly up-regulated in response to 6-BA treatment. Expression levels of auxin synthesis- and transport-related genes, such as MhYUCCA6, MhYUCCA10, MhPIN1 and MhPIN2, were down-regulated, which corresponds with lower auxin levels in the 6-BA-treated seedlings. A negative regulator of auxin, MhIAA3, was induced by 6-BA treatment, leading to reduced expression of MhARF7 and MhARF19 in 6-BA-treated seedlings. As a result, expression of MhWOX11, MhWOX5, MhLBD16 and MhLBD29 was blocked, which in turn inhibited lateral root initiation. In addition, a lower auxin level decreased expression of MhRR7 and MhRR15, which repressed expression of key transcription factors associated with root development, thus inhibiting lateral root development. In contrast, 6-BA treatment promoted secondary growth (thickening) of the root by inducing expression of MhCYCD3;1 and MhCYCD3;2. Collectively, the changes in hormone levels and gene expression resulted in a reduced number of lateral roots and thicker roots in 6-BA-treated plants.
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Affiliation(s)
- J Mao
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
- College of Life Science, Northwest Agriculture & Forestry University, Yangling, China
| | - C Niu
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - K Li
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - M Mobeen Tahir
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - A Khan
- Department of Agricultural Sciences, the University of Haripur, Haripur, Pakistan
| | - H Wang
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - S Li
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - Y Liang
- Beijing Ori-Gene Science and Technology Corp., Ltd., Beijing, China
| | - G Li
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - Z Yang
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - L Zuo
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - M Han
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - X Ren
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
| | - N An
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
- College of Life Science, Northwest Agriculture & Forestry University, Yangling, China
| | - D Zhang
- College of Horticulture, Northwest Agriculture & Forestry University, Yangling, China
- College of Life Science, Northwest Agriculture & Forestry University, Yangling, China
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Zheng F, Wang T, Niu C, Zheng R, Liu C, Wang J, Li Q. Roles of Divalent-Cation Transporter Genes mntB and mntC of Beer Spoilage Bacteria in Resisting Hop Bitter Compound Iso-α-Acid. Journal of the American Society of Brewing Chemists 2020. [DOI: 10.1080/03610470.2020.1814049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Tianmu Wang
- School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Ruilong Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu Province, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, Jiangsu Province, China
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Min S, Niu C, Shan W, Sun W, Liu C, Zheng F, Wang J, Li Q. Composition, source, and influencing factors of white spots formation in soybean paste. J Food Sci 2020; 85:3113-3123. [PMID: 32954501 DOI: 10.1111/1750-3841.15457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 07/29/2020] [Accepted: 08/25/2020] [Indexed: 11/30/2022]
Abstract
White spots are commonly found in bean-based fermented food, which will significantly lower the product quality. This study aimed to analyze the composition of white spots and further reveal the source and influencing factors of white spots in bean-based fermented food using soybean paste as study model. The results showed that white spots were mainly composed of 40.96% free tyrosine and 37.94% tyrosine in combination form. During soybean paste fermentation, tyrosine was found to be produced by the actions of proteolytic enzymes secreted by Aspergillus oryzae 3.042 instead of the microbial metabolism and the excessive accumulation of tyrosine in soybean paste led to the formation of white spots. Among all influencing factors, high temperature treatment favored the formation of white spots. The existence of soy peptone and phenylalanine would postpone the precipitation of tyrosine while promoting the aggregation of the tyrosine precipitation. Field emission scanning electron microscope analysis showed that tyrosine would accumulate around the soybean protein particles and treatment at 120 °C would disrupt the structure of tyrosine-protein complex. Based on the above results, we proposed that treatment of soybean paste at temperature lower than 80 °C was the current practically applicable method to control the formation of white spots in soybean paste. PRACTICAL APPLICATION: This study developed a new idea to understand the composition and formation of white spots in soybean paste, which would provide guidance for prevention and control of white spots during the production of soybean paste for manufacturers and researchers.
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Affiliation(s)
- Shihao Min
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Wanxiang Shan
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Weikang Sun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
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Niu C, Xue Y, Jia Y, Xu T, Liu C, Zheng F, Wang J, Li Q. Analysis of bacterial community dynamics in the manufacture process of lajiaojiang (red chili paste). Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108976] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Sun W, Liu C, Luo J, Niu C, Wang J, Zheng F, Li Q. Residue analysis of gibberellic acid isomer (iso-GA3) in brewing process and its toxicity evaluation in mice. Regul Toxicol Pharmacol 2020; 110:104514. [DOI: 10.1016/j.yrtph.2019.104514] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 10/28/2019] [Accepted: 11/03/2019] [Indexed: 01/15/2023]
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Xu X, Song Y, Guo L, Cheng W, Niu C, Wang J, Liu C, Zheng F, Zhou Y, Li X, Mu Y, Li Q. Higher NADH Availability of Lager Yeast Increases the Flavor Stability of Beer. J Agric Food Chem 2020; 68:584-590. [PMID: 31623437 DOI: 10.1021/acs.jafc.9b05812] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Flavor stability is a significant concern to brewers as the staling compounds impart unpleasant flavor to beer. Thus, yeasts with antistaling ability have been engineered to produce beer with improved flavor stability. Here, we proposed that increasing the NADH availability of yeast could improve the flavor stability of beer. By engineering endogenous pathways, we obtained an array of yeast strains with a higher reducing activity. Then, we carried out beer fermentation with these strains and found that the antistaling capacities of the beer samples were improved. For a better understanding of the underlying mechanism, we compared the flavor profiles of these strains. The production of staling components was significantly decreased, whereas the content of antistaling components, such as SO2, was increased, in line with the increased antistaling ability. The other aroma components were marginally changed, indicating that this concept was useful for improving the antistaling stability without changing the flavor of beer.
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Affiliation(s)
| | - Yumei Song
- Beijing Yanjing Brewery Group Co., Ltd. , Beijing 101300 , China
| | - Liyun Guo
- Beijing Yanjing Brewery Group Co., Ltd. , Beijing 101300 , China
| | | | | | | | | | | | | | | | - Yingjian Mu
- Beijing Yanjing Brewery Group Co., Ltd. , Beijing 101300 , China
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Niu C, Xue Y, Liu C, Zheng F, Wang J, Li Q. Identification of gas-forming spoilage bacteria in chili sauce and its control using nisin and salt. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108658] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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Han J, Yang M, Guo T, Niu C, Liu J, Yue Y, Yuan C, Yang B. Two linked TBXT (brachyury) gene polymorphisms are associated with the tailless phenotype in fat-rumped sheep. Anim Genet 2019; 50:772-777. [PMID: 31475743 PMCID: PMC6899607 DOI: 10.1111/age.12852] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2019] [Indexed: 12/15/2022]
Abstract
T‐box transcription factor T (TBXT), encoding the brachyury protein, is an embryonic nuclear transcription factor involved in mesoderm formation and differentiation. Previous studies indicate that TBXT mutations are responsible for the tailless or short‐tailed phenotype of many vertebrates. To verify whether the tailless phenotype in fat‐rumped sheep is associated with TBXT mutations, exon 2 of the TBXT gene for 301 individuals belonging to 13 Chinese and Iranian sheep breeds was directly sequenced. Meanwhile, 380 samples were used to detect the genotypes of the candidate variations by mapping to their reads databases in the Sequence Read Archive repository of GenBank. The results showed that one missense mutation, c.334G>T (GGG>TGG) with a completely linked synonymous variant c.333G>C (CCG>CCC) was found to be associated with the ‘tailless’ characteristic in typical fat‐rumped sheep breeds. The c.334G>T transversion led to the conversion of glycine to tryptophan at the 112th amino acid in the T‐box domain of the brachyury protein. In addition, crossbreeding experiments for long‐tailed and tailless sheep showed that CT/CT allele of nucleotides (nt) 333 and 334, a recessive mutation, would cause sheep tails to be shorter, suggesting that these two linked variants at nucleotides 333 and 334 in TBXT are probably causative mutations responsible for the tailless phenotype in sheep.
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Affiliation(s)
- J Han
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China.,College of Animal Science and Technology, Shihezi University, Shihezi, 832000, China
| | - M Yang
- College of Animal Science and Technology, Shihezi University, Shihezi, 832000, China.,Key Laboratory of Animal (Poultry) Genetics Breeding and Reproduction, Ministry of Agriculture, Beijing, 100083, China
| | - T Guo
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - C Niu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - J Liu
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - Y Yue
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China.,International Livestock Research Institute (ILRI), PO Box 30709, Nairobi, 00100, Kenya
| | - C Yuan
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
| | - B Yang
- Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, 730050, China
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40
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Niu C, Li X, Xu X, Bao M, Li Y, Liu C, Zheng F, Wang J, Li Q. [Research progresses in microbial 1,3-1,4-β-glucanase: protein engineering and industrial applications]. Sheng Wu Gong Cheng Xue Bao 2019; 35:1234-1246. [PMID: 31328480 DOI: 10.13345/j.cjb.180464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
1,3-1,4-β-glucanase (E.C.3.2.1.73) is an important industrial enzyme which cleave β-glucans into oligosaccharides through strictly cutting the β-1,4 glycosidic bonds in 3-O-substituted glucopyranose units. Microbial 1,3-1,4-β-glucanase belongs to retaining glycosyl hydrolases of family 16 with a jellyroll β-sandwich fold structure. The present paper reviews the industrial application and protein engineering of microbial β-glucanases in the last decades and forecasts the research prospects of microbial β-glucanases.
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Affiliation(s)
- Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Xinyue Li
- School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Min Bao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, Jiangsu, China
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41
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Zhang M, Wang J, Niu C, Li Y, Zheng F, Liu C, Li Q. [Progress in brewer's yeast cell wall stress response]. Sheng Wu Gong Cheng Xue Bao 2019; 35:1214-1221. [PMID: 31328478 DOI: 10.13345/j.cjb.180513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Yeast cell wall plays an important role in the establishment and maintenance of cell morphology upon the cell wall stress. The cell wall of yeast consists of β-glucans, mannoproteins and chitin. The composition and structure remodel due to cell wall stress. Brewer's yeast cell wall exhibits stress response during long-term acclimation in order to adapt to environmental changes. This paper reviews the composition and structure of yeast cell wall and the molecular mechanisms of cell wall remodeling and signal pathway regulation.
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Affiliation(s)
- Mingfang Zhang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
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42
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Wang J, Li M, Hou D, Xu W, Zheng F, Liu C, Niu C, Li Q. [Regulations of RLM1 gene affect the anti-autolytic ability of lager yeast]. Sheng Wu Gong Cheng Xue Bao 2019; 35:1059-1070. [PMID: 31232002 DOI: 10.13345/j.cjb.180530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The autolysis of brewer's yeast seriously affects the quality of beer and the quality of yeast is considered as one of the key factors in beer brewing. Previous studies on brewer's yeast autolysis showed that RLM1 gene, an important transcription factor in cell integrity pathway, is closely related to the autolysis of yeast. In this study, RLM1 was knocked out and overexpressed in a haploid brewer's yeast. RLM1 disruption resulted in poor anti-autolysis performance of yeast, whereas overexpression of RLM1 contributed to the anti-autolytic ability of yeast. In addition, RLM1 gene knockout affected the osmotic stress resistance, cell wall damage resistance, nitrogen starvation resistance and temperature tolerance of yeast strain. The transcriptional level of GAS1 involved in cell wall assembly and DNA damage response was regulated along with the expression of RLM1, whereas other genes in CWI pathway did not show apparent regularity. RLM1 might mainly affect the expression of GAS1 so as to improve the stress resistance of lager yeast in harsh environment. The result from this study help further understand the mechanism of yeast autolysis and lay a foundation for breeding brewer's yeast strain with better anti-autolytic ability.
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Affiliation(s)
- Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Mengqi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Dan Hou
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Weina Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China.,Laboratory of Brewing Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
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43
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Wang X, Niu C, Bao M, Li Y, Liu C, Yun Z, Li Q, Wang J. Simultaneous enhancement of barley β-amylase thermostability and catalytic activity by R115 and T387 residue sites mutation. Biochem Biophys Res Commun 2019; 514:301-307. [PMID: 31030939 DOI: 10.1016/j.bbrc.2019.04.095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 04/13/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE To simultaneously increase the thermostability and catalytic activity of barley β-amylase. METHODS The amino acid sequences of various barley β-amylases with different enzyme properties were aligned, two amino acid residues R115 and T387 were identified to be important for barley β-amylase properties. R115C and T387V were then generated using site-directed and saturation mutagenesis. RESULTS R115C and T387V mutants increased the enzyme catalytic activity and thermostability, respectively. After combinational mutagenesis, the T50 value and t(1/2,60oC) value of R115C/T387V mutant reached 59.4 °C and 48.8 min, which were 3.6 °C higher and 29.5 min longer than those of wild-type. The kcat/Km value of mutant R115C/T387V were 59.82/s·mM, which were 54.7% higher than that of wild-type. The increased surface hydrophobicity and newly formed strong hydrogen bonds and salt bridges might be responsible for the enzyme thermostability improvement while the two additional hydrogen bonds formed in the active center may lead to the catalytic property enhancement. CONCLUSIONS The mutant R115C/T387V showed high catalytic activity and thermostability indicating great potential for application in industry.
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Affiliation(s)
- Xueliang Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Min Bao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Zhengfei Yun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; Collaborative Innovation Center of Jiangsu Modern Industrial Fermentation, Jiangnan University, Wuxi, 214122, China
| | - Jingjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
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Sun W, Liu C, Duan H, Niu C, Wang J, Zheng F, Li Y, Li Q. Isomerization of Gibberellic Acid During the Brewing Process. J Food Sci 2019; 84:1353-1361. [PMID: 31066915 DOI: 10.1111/1750-3841.14620] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 03/16/2019] [Accepted: 03/19/2019] [Indexed: 12/17/2022]
Abstract
Gibberellic acid (GA3) was added to three types of beer barley, and the chemical changes to GA3 during the beer brewing process were studied using HPLC. The results demonstrated that the GA3 concentration decreased throughout the malting, mashing, and boiling processes and that no GA3 was detected in the congress wort. A new substance, herein called Substance A, was detected by HPLC analysis using a C18 column; this substance exhibited retention characteristics different from GA3. The concentration of Substance A increased throughout the malting, mashing, and boiling processes. Mass spectrometry revealed that Substance A has the same molecular weight as GA3 and nuclear magnetic resonance studies determined that Substance A is a structural isomer of GA3. PRACTICAL APPLICATION: This study developed a new idea to understand GA3 behavior during the brewing, which provided a practical reference for food safety in beer and other fields using GA3 as a food additive.
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Affiliation(s)
- Weikang Sun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Hongxu Duan
- School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan Univ., Wuxi, 214122, China
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45
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Wang Z, Wang J, Shan W, Zheng F, Niu C, Liu C, Li Q. Intracellular Adenosine Triphosphate (ATP) Content Sensitively Reflects Subtle Differences in Yeast Physiology. Journal of the American Society of Brewing Chemists 2019. [DOI: 10.1080/03610470.2019.1577706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zengmei Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Wanxiang Shan
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Laboratory of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214000, China
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46
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Xu X, Niu C, Liu C, Li Q. Unraveling the Mechanisms for Low-Level Acetaldehyde Production during Alcoholic Fermentation in Saccharomyces pastorianus Lager Yeast. J Agric Food Chem 2019; 67:2020-2027. [PMID: 30666873 DOI: 10.1021/acs.jafc.8b06868] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Acetaldehyde is produced by yeast during alcoholic fermentation, and its modification greatly affects beer flavor and quality. In the current study, we analyzed two yeast strains with a low level of acetaldehyde to reveal the potential mechanism underpinning the desirable low acetaldehyde production by these strains. We demonstrated that high alcohol dehydrogenase (ADH) activity and high NADH availability were the dominant factors for the low level of acetaldehyde in the fermentation liquor at the end of fermentation. High ADH activity resulted in reduced accumulation of acetaldehyde during the cell growth phase by increasing the flux to ethanol, whereas high NADH availability (in the cytosol or mitochondria) enhanced acetaldehyde reduction at the later phase of main fermentation. Furthermore, NADH availability is a more useful target trait than ADH activity for constructing yeast strains with a low level of acetaldehyde for industrial applications in terms of flavor contribution and unaltered fermentation period.
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Affiliation(s)
- Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , People's Republic of China
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , Jiangsu 214000 , People's Republic of China
- School of Biotechnology , Jiangnan University , 1800 Lihu Avenue , Wuxi , Jiangsu 214122 , People's Republic of China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , People's Republic of China
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , Jiangsu 214000 , People's Republic of China
- School of Biotechnology , Jiangnan University , 1800 Lihu Avenue , Wuxi , Jiangsu 214122 , People's Republic of China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , People's Republic of China
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , Jiangsu 214000 , People's Republic of China
- School of Biotechnology , Jiangnan University , 1800 Lihu Avenue , Wuxi , Jiangsu 214122 , People's Republic of China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology , Jiangnan University , Wuxi , Jiangsu 214122 , People's Republic of China
- State Key Laboratory of Food Science and Technology , Jiangnan University , Wuxi , Jiangsu 214000 , People's Republic of China
- School of Biotechnology , Jiangnan University , 1800 Lihu Avenue , Wuxi , Jiangsu 214122 , People's Republic of China
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47
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Xu X, Bao M, Niu C, Wang J, Liu C, Zheng F, Li Y, Li Q. Engineering the cytosolic NADH availability in lager yeast to improve the aroma profile of beer. Biotechnol Lett 2019; 41:363-369. [PMID: 30707389 DOI: 10.1007/s10529-019-02653-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 01/25/2019] [Indexed: 12/27/2022]
Abstract
OBJECTIVE To improve the aroma profile of beer by using metabolic engineering to increase the availability of cytosolic NADH in lager yeast. RESULTS To alter NADH levels in lager yeast, the native FDH1 (YOR388C) encoding NAD+-dependent formate dehydrogenase was overexpressed in the yeast strain M14, yielding strain M-FDH1. This led to a simultaneous increase of NADH availability and NADH/NAD+ ratio in the M-FDH1 strain during fermentation. At the end of the main fermentation period, ethanol production by strain M-FDH1 was decreased by 13.2%, while glycerol production was enhanced by 129.4%, compared to the parental strain respectively. The production of esters and fusel alcohols by strains M14 and M-FDH1 was similar. By contrast, strain M-FDH1 generally produced less organic acids and off-flavor components than strain M14, improving the beer aroma. CONCLUSIONS Increased NADH availability led to rerouting of the carbon flux toward NADH-consuming pathways and accelerated the NADH-dependent reducing reactions in yeast, greatly impacting the formation of aroma compounds and improving the beer aroma.
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Affiliation(s)
- Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Min Bao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.
- School of Biotechnology, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, Jiangsu, China.
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48
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Wang J, Ding H, Zheng F, Li Y, Liu C, Niu C, Li Q. Physiological Changes of Beer Brewer's Yeast During Serial Beer Fermentation. Journal of the American Society of Brewing Chemists 2019. [DOI: 10.1080/03610470.2018.1546030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Huajian Ding
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, China
- Lab of Brewing Science and Technology, School of Biotechnology, Jiangnan University, Wuxi, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
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49
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Xu X, Wang J, Bao M, Niu C, Liu C, Zheng F, Li Y, Li Q. Reverse metabolic engineering in lager yeast: impact of the NADH/NAD + ratio on acetaldehyde production during the brewing process. Appl Microbiol Biotechnol 2018; 103:869-880. [PMID: 30535678 DOI: 10.1007/s00253-018-9517-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/15/2018] [Accepted: 11/11/2018] [Indexed: 01/15/2023]
Abstract
Acetaldehyde is synthesized by yeast during the main fermentation period of beer production, which causes an unpleasant off-flavor. Therefore, there has been extensive effort toward reducing acetaldehyde to obtain a beer product with better flavor and anti-staling ability. In this study, we discovered that acetaldehyde production in beer brewing is closely related with the intracellular NADH equivalent regulated by the citric acid cycle. However, there was no significant relationship between acetaldehyde production and amino acid metabolism. A reverse engineering strategy to increase the intracellular NADH/NAD+ ratio reduced the final acetaldehyde production level, and vice versa. This work offers new insight into acetaldehyde metabolism and further provides efficient strategies for reducing acetaldehyde production by the regulating the intracellular NADH/NAD+ ratio through cofactor engineering.
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Affiliation(s)
- Xin Xu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Jinjing Wang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Min Bao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Yongxian Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China.,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China. .,State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214000, China. .,School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu, 214122, People's Republic of China.
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50
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Niu C, Min S, Jia Y, Zhao J, Yang Y, Liu C, Zheng F, Li Q. Adaptive evolution of Aspergillus oryzae 3.042 strain and process optimization to reduce the formation of tyrosine crystals in broad bean paste. J Food Biochem 2018; 43:e12716. [PMID: 31353653 DOI: 10.1111/jfbc.12716] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/16/2018] [Accepted: 10/11/2018] [Indexed: 11/28/2022]
Abstract
Tyrosine crystals occasionally appeared on the broad bean paste surface, which will cause economic losses. This study aimed to eliminate the tyrosine crystals in broad bean paste through decreasing the activities of proteolytic enzymes produced by Aspergillus oryzae and process optimization. Broad bean pastes containing no more than 6.16 mg/g dry material tyrosine showed low possibility to form tyrosine crystals. Using tyrosine as substrate, the A. oryzae 3.042 was adaptively evolved and the tyrosine content in the broad bean paste fermented by the evolved A. oryzae was reduced from 6.49 mg/g dry material to 6.14 mg/g dry material (p < 0.05). When the production process was optimized, the tyrosine content in broad bean paste was further reduced to 5.67 mg/g dry material (p < 0.05). In this condition, no tyrosine crystals were formed in broad bean paste after the 12-month storage while the product quality was not influenced. PRACTICAL APPLICATIONS: Tyrosine crystals were one of the most important factors which negatively influence the quality of traditionally fermented food, including broad bean paste, soybean paste, and sausages. The appearance of tyrosine crystals in these foods will cause economic losses to manufacturers. This study tried to eliminate the appearance of tyrosine crystals through decreasing the activities of proteolytic enzymes produced by Aspergillus oryzae 3.042 and fermentation process optimization. The adoption of modified A. oryzae and optimized fermentation process successfully guaranteed the elimination of tyrosine crystals formation in the production and storage period of broad bean paste. This will not only benefit the broad bean paste manufacturers but also provide guidance for other fermented food producers to deal with tyrosine crystals problem.
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Affiliation(s)
- Chengtuo Niu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Shihao Min
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yun Jia
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Jiadi Zhao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yue Yang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Chunfeng Liu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Feiyun Zheng
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Qi Li
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, Wuxi, China
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