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Guo D, Wang Z, Wei W, Song W, Wu J, Wen J, Hu G, Li X, Gao C, Chen X, Liu L. Rational design improves both thermostability and activity of a new D-tagatose 3-epimerase from Kroppenstedtia eburnean to produce D-allulose. Enzyme Microb Technol 2024; 178:110448. [PMID: 38657401 DOI: 10.1016/j.enzmictec.2024.110448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/19/2024] [Accepted: 04/14/2024] [Indexed: 04/26/2024]
Abstract
D-allulose is a naturally occurring rare sugar and beneficial to human health. However, the efficient biosynthesis of D-allulose remains a challenge. Here, we mined a new D-tagatose 3-epimerase from Kroppenstedtia eburnean (KeDt3e) with high catalytic efficiency. Initially, crucial factors contributing to the low conversion of KeDt3e were identified through crystal structure analysis, density functional theory calculations (DFT), and molecular dynamics (MD) simulations. Subsequently, based on the mechanism, combining restructuring the flexible region, proline substitution based onconsensus sequence analysis, introducing disulfide bonds, and grafting properties, and reshaping the active center, the optimal mutant M5 of KeDt3e was obtained with enhanced thermostability and activity. The optimal mutant M5 exhibited an enzyme activity of 130.8 U/mg, representing a 1.2-fold increase; Tm value increased from 52.7 °C to 71.2 °C; and half-life at 55 °C extended to 273.7 min, representing a 58.2-fold improvement, and the detailed mechanism of performance improvement was analyzed. Finally, by screening the ribosome-binding site (RBS) of the optimal mutant M5 recombinant bacterium (G01), the engineered strain G08 with higher expression levels was obtained. The engineered strain G08 catalyzed 500 g/L D-fructose to produce 172.4 g/L D-allulose, with a conversion of 34.4% in 0.5 h and productivity of 344.8 g/L/h on a 1 L scale. This study presents a promising approach for industrial-scale production of D-allulose.
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Affiliation(s)
- Dingyu Guo
- School of Food Engineering, Anhui Science and Technology University, Chuzhou 233100, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Zhengchao Wang
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Wanqing Wei
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Wei Song
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Jing Wu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Jian Wen
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Guipeng Hu
- School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
| | - Xiaomin Li
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Cong Gao
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Xiulai Chen
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Liming Liu
- School of Food Engineering, Anhui Science and Technology University, Chuzhou 233100, China; School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, China.
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Li Z, Hu Y, Yu C, Fei K, Shen L, Liu Y, Nakanishi H. Semi-rational engineering of D-allulose 3-epimerase for simultaneously improving the catalytic activity and thermostability based on D-allulose biosensor. Biotechnol J 2024; 19:e2400280. [PMID: 39167550 DOI: 10.1002/biot.202400280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 07/12/2024] [Accepted: 07/15/2024] [Indexed: 08/23/2024]
Abstract
BACKGROUND D-Allulose is one of the most well-known rare sugars widely used in food, cosmetics, and pharmaceutical industries. The most popular method for D-allulose production is the conversion from D-fructose catalyzed by D-allulose 3-epimerase (DAEase). To address the general problem of low catalytic efficiency and poor thermostability of wild-type DAEase, D-allulose biosensor was adopted in this study to develop a convenient and efficient method for high-throughput screening of DAEase variants. RESULTS The catalytic activity and thermostability of DAEase from Caballeronia insecticola were simultaneously improved by semi-rational molecular modification. Compared with the wild-type enzyme, DAEaseS37N/F157Y variant exhibited 14.7% improvement in the catalytic activity and the half-time value (t1/2) at 65°C increased from 1.60 to 27.56 h by 17.23-fold. To our delight, the conversion rate of D-allulose was 33.6% from 500-g L-1 D-fructose in 1 h by Bacillus subtilis WB800 whole cells expressing this DAEase variant. Furthermore, the practicability of cell immobilization was evaluated and more than 80% relative activity of the immobilized cells was maintained from the second to seventh cycle. CONCLUSION All these results indicated that the DAEaseS37N/F157Y variant would be a potential candidate for the industrial production of D-allulose.
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Affiliation(s)
- Zijie Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
| | - Yangfan Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
| | - Cheng Yu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
| | - Kangqing Fei
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
| | - Liqun Shen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
| | - Yishi Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
| | - Hideki Nakanishi
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, School of Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
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Xie X, Li C, Ban X, Yang H, Li Z. D-allulose 3-epimerase for low-calorie D-allulose synthesis: microbial production, characterization, and applications. Crit Rev Biotechnol 2024:1-20. [PMID: 38973014 DOI: 10.1080/07388551.2024.2368517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 04/15/2023] [Indexed: 07/09/2024]
Abstract
D-allulose, an epimer of D-fructose at C-3 position, is a low-calorie rare sugar with favorable physiochemical properties and special physiological functions, which displays promising perspectives in the food and pharmaceutical industries. Currently, D-allulose is extremely sparse in nature and is predominantly biosynthesized through the isomerization of D-fructose by D-allulose 3-epimerase (DAEase). In recent years, D-allulose 3-epimerase as the key biocatalyst for D-allulose production has received increasing interest. The current review begins by providing a summary of D-allulose regarding its characteristics and applications, as well as different synthesis pathways dominated by biotransformation. Then, the research advances of D-allulose 3-epimerase are systematically reviewed, focusing on heterologous expression and biochemical characterization, crystal structure and molecular modification, and application in D-allulose production. Concerning the constraint of low yield of DAEase for industrial application, this review addresses the various attempts made to promote the production of DAEase in different expression systems. Also, various strategies have been adopted to improve its thermotolerance and catalytic activity, which is mainly based on the structure-function relationship of DAEase. The application of DAEase in D-allulose biosynthesis from D-fructose or low-cost feedstocks through single- or multi-enzymatic cascade reaction has been discussed. Finally, the prospects for related research of D-allulose 3-epimerase are also proposed, facilitating the industrialization of DAEase and more efficient and economical bioproduction of D-allulose.
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Affiliation(s)
- Xiaofang Xie
- Department of Food Science and Technology, National University of Singapore, Singapore, Singapore
- National University of Singapore (Suzhou) Research Institute, Suzhou, Jiangsu, P. R. China
| | - Caiming Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
- School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
| | - Xiaofeng Ban
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
- School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
| | - Hongshun Yang
- Department of Food Science and Technology, National University of Singapore, Singapore, Singapore
- National University of Singapore (Suzhou) Research Institute, Suzhou, Jiangsu, P. R. China
| | - Zhaofeng Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
- School of Food Science and Technology, Jiangnan University, Wuxi, P. R. China
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Ding W, Liu C, Huang C, Zhang X, Chi X, Wang T, Guo Q, Wang C. The Formation of D-Allulose 3-Epimerase Hybrid Nanoflowers and Co-Immobilization on Resins for Improved Enzyme Activity, Stability, and Processability. Int J Mol Sci 2024; 25:6361. [PMID: 38928068 PMCID: PMC11203923 DOI: 10.3390/ijms25126361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 06/02/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
As a low-calorie sugar, D-allulose is produced from D-fructose catalyzed by D-allulose 3-epimerase (DAE). Here, to improve the catalytic activity, stability, and processability of DAE, we reported a novel method by forming organic-inorganic hybrid nanoflowers (NF-DAEs) and co-immobilizing them on resins to form composites (Re-NF-DAEs). NF-DAEs were prepared by combining DAE with metal ions (Co2+, Cu2+, Zn2+, Ca2+, Ni2+, Fe2+, and Fe3+) in PBS buffer, and were analyzed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, and X-ray diffraction. All of the NF-DAEs showed higher catalytic activities than free DAE, and the NF-DAE with Ni2+ (NF-DAE-Ni) reached the highest relative activity of 218%. The NF-DAEs improved the thermal stability of DAE, and the longest half-life reached 228 min for NF-DAE-Co compared with 105 min for the free DAE at 55 °C. To further improve the recycling performance of the NF-DAEs in practical applications, we combined resins and NF-DAEs to form Re-NF-DAEs. Resins and NF-DAEs co-effected the performance of the composites, and ReA (LXTE-606 neutral hydrophobic epoxy-based polypropylene macroreticular resins)-based composites (ReA-NF-DAEs) exhibited outstanding relative activities, thermal stabilities, storage stabilities, and processabilities. The ReA-NF-DAEs were able to be reused to catalyze the conversion from D-fructose to D-allulose, and kept more than 60% of their activities after eight cycles.
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Affiliation(s)
- Wentao Ding
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Chensa Liu
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
| | - Chi Huang
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
| | - Xin Zhang
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
| | - Xinyi Chi
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
| | - Tong Wang
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
| | - Qingbin Guo
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Changlu Wang
- School of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China; (W.D.); (C.L.); (C.H.); (X.Z.); (X.C.); (T.W.)
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Tianjin 300457, China
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Shen JD, Xu BP, Yu TL, Fei YX, Cai X, Huang LG, Jin LQ, Liu ZQ, Zheng YG. Identification of hyperthermophilic D-allulose 3-epimerase from Thermotoga sp. and its application as a high-performance biocatalyst for D-allulose synthesis. Bioprocess Biosyst Eng 2024; 47:841-850. [PMID: 38676737 DOI: 10.1007/s00449-024-02989-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 03/04/2024] [Indexed: 04/29/2024]
Abstract
D-Allulose 3-epimerase (DAE) is a vital biocatalyst for the industrial synthesis of D-allulose, an ultra-low calorie rare sugar. However, limited thermostability of DAEs hinders their use at high-temperature production. In this research, hyperthermophilic TI-DAE (Tm = 98.4 ± 0.7 ℃) from Thermotoga sp. was identified via in silico screening. A comparative study of the structure and function of site-directed saturation mutagenesis mutants pinpointed the residue I100 as pivotal in maintaining the high-temperature activity and thermostability of TI-DAE. Employing TI-DAE as a biocatalyst, D-allulose was produced from D-fructose with a conversion rate of 32.5%. Moreover, TI-DAE demonstrated excellent catalytic synergy with glucose isomerase CAGI, enabling the one-step conversion of D-glucose to D-allulose with a conversion rate of 21.6%. This study offers a promising resource for the enzyme engineering of DAEs and a high-performance biocatalyst for industrial D-allulose production.
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Affiliation(s)
- Ji-Dong Shen
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Bao-Ping Xu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Te-Li Yu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yong-Xiang Fei
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xue Cai
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Liang-Gang Huang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Li-Qun Jin
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Zhi-Qiang Liu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China.
| | - Yu-Guo Zheng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, China
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Wang Z, Wang H, Feng T, Li N, Sun Q, Liu J. Simultaneous Enhancement of the Thermostability and Catalytic Activity of D-Allulose 3-Epimerase from Clostridium bolteae ATTC BAA-613 Based on the "Back to Consensus Mutations" Hypothesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38603782 DOI: 10.1021/acs.jafc.4c01146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
D-Allulose is a high value rare sugar with multiple physiological functions and commercial potential that can be enzymatically synthesized from D-fructose by D-allulose 3-epimerase (DAEase). Poor catalytic activity and thermostability of DAEase prevent the industrial production of D-allulose. In this work, rational design was applied to a previously identified DAEase from Clostridium bolteae ATCC BAA-613 based on the "back to consensus mutations" hypothesis, and the catalytic activity of the Cb-I265 V variant was enhanced 2.5-fold. Furthermore, the Cb-I265 V/E268D double-site variant displayed 2.0-fold higher specific catalytic activity and 1.4-fold higher thermostability than the wild-type enzyme. Molecular docking and kinetic simulation results indicated increased hydrogen bonds between the active pocket and substrate, possibly contributing to the improved thermal stability and catalytic activity of the double-site mutant. The findings outlined a feasible approach for the rational design of multiple preset functions of target enzymes simultaneously.
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Affiliation(s)
- Zhiqi Wang
- College of Light Industry and Food Engineering, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Huiyi Wang
- College of Light Industry and Food Engineering, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Tingting Feng
- College of Light Industry and Food Engineering, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Ning Li
- College of Light Industry and Food Engineering, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, China
| | - Qinju Sun
- Guangxi Vocational University of Agriculture, 176 Daxue Road, Nanning, Guangxi 530004, China
| | - Jidong Liu
- College of Light Industry and Food Engineering, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, China
- Academy of Sugarcane and Sugar Industry, Guangxi University, 100 Daxue Road, Nanning, Guangxi 530004, China
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7
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Sharma S, Patel SN, Singh SP. A novel thermotolerant L-rhamnose isomerase variant for biocatalytic conversion of D-allulose to D-allose. Appl Microbiol Biotechnol 2024; 108:279. [PMID: 38564031 PMCID: PMC10987364 DOI: 10.1007/s00253-024-13074-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/24/2024] [Accepted: 02/13/2024] [Indexed: 04/04/2024]
Abstract
A novel L-rhamnose isomerase was identified and cloned from an extreme-temperature aquatic habitat metagenome. The deduced amino acid sequence homology suggested the possible source of this metagenomic sequence to be Chloroflexus islandicus. The gene expression was performed in a heterologous host, Escherichia coli, and the recombinant protein L-rhamnose isomerase (L-RIM) was extracted and purified. The catalytic function of L-RIM was characterized for D-allulose to D-allose bioconversion. D-Allose is a sweet, rare sugar molecule with anti-tumour, anti-hypertensive, cryoprotective, and antioxidative properties. The characterization experiments showed L-RIM to be a Co++- or Mn++-dependent metalloenzyme. L-RIM was remarkably active (~ 80%) in a broad spectrum of pH (6.0 to 9.0) and temperature (70 to 80 °C) ranges. Optimal L-RIM activity with D-allulose as the substrate occurred at pH 7.0 and 75 °C. The enzyme was found to be excessively heat stable, displaying a half-life of about 12 days and 5 days at 65 °C and 70 °C, respectively. L-RIM catalysis conducted at slightly acidic pH of 6.0 and 70 °C achieved biosynthesis of about 30 g L-1 from 100 g L-1 D-allulose in 3 h. KEY POINTS: • The present study explored an extreme temperature metagenome to identify a novel gene that encodes a thermostable l-rhamnose isomerase (L-RIM) • L-RIM exhibits substantial (80% or more) activity in a broad spectrum of pH (6.0 to 9.0) and temperature (70 to 80 °C) ranges • L-RIM is excessively heat stable, displaying a half-life of about 12 days and 5 days at 65 °C and 70 °C, respectively.
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Affiliation(s)
- Sweety Sharma
- Center of Innovative and Applied Bioprocessing, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), NABI Campus, SAS Nagar, Sector 81, Mohali, India, 140306
- Indian Institute of Science Education and Research Mohali, SAS Nagar, Sector 81, Mohali, India, 140306
| | - Satya Narayan Patel
- Center of Innovative and Applied Bioprocessing, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), NABI Campus, SAS Nagar, Sector 81, Mohali, India, 140306
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing, Biotechnology Research and Innovation Council (Department of Biotechnology, Government of India), NABI Campus, SAS Nagar, Sector 81, Mohali, India, 140306.
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Guan L, Zhu L, Wang K, Gao Y, Li J, Yan S, Zhang X, Ji N, Fan J, Zhou Y, Yao X, Li B. Biochemical characterization, structure-guided mutagenesis, and application of a recombinant D-allulose 3-epimerase from Christensenellaceae bacterium for the biocatalytic production of D-allulose. Front Bioeng Biotechnol 2024; 12:1365814. [PMID: 38476966 PMCID: PMC10927987 DOI: 10.3389/fbioe.2024.1365814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 02/16/2024] [Indexed: 03/14/2024] Open
Abstract
D-Allulose has become a promising alternative sweetener due to its unique properties of low caloric content, moderate sweetness, and physiological effects. D-Allulose 3-epimerase (DAEase) is a promising enzyme for D-Allulose production. However, the low catalytic efficiency limited its large-scale industrial applications. To obtain a more effective biocatalyst, a putative DAEase from Christensenellaceae bacterium (CbDAE) was identified and characterized. The recombinant CbDAE exhibited optimum activity at pH 7.5°C and 55°C, retaining more than 60% relative activity from 40°C to 70°C, and the catalytic activity could be significantly increased by Co2+ supplementation. These enzymatic properties of purified CbDAE were compared with other DAEases. CbDAE was also found to possess desirable thermal stability at 55°C with a half-life of 12.4 h. CbDAE performed the highest relative activity towards D-allulose and strong affinity for D-fructose but relatively low catalytic efficiency towards D-fructose. Based on the structure-guided design, the best double-mutation variant G36N/W112E was obtained which reached up to 4.21-fold enhancement of catalytic activity compared with wild-type (WT) CbDAE. The catalytic production of G36N/W112E with 500 g/L D-fructose was at a medium to a higher level among the DAEases in 3.5 h, reducing 40% catalytic reaction time compared to the WT CbDAE. In addition, the G36N/W112E variant was also applied in honey and apple juice for D-allulose conversion. Our research offers an extra biocatalyst for D-allulose production, and the comprehensive report of this enzyme makes it potentially interesting for industrial applications and will aid the development of industrial biocatalysts for D-allulose.
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Affiliation(s)
- Lijun Guan
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Ling Zhu
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Kunlun Wang
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Yang Gao
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Jialei Li
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Song Yan
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Xindi Zhang
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Nina Ji
- Heilongjiang Academy of Agricultural Sciences, Soybean Institute, Harbin, China
| | - Jing Fan
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Ye Zhou
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Xinmiao Yao
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
| | - Bo Li
- Heilongjiang Academy of Sciences, Institute of Food Processing, Harbin, China
- Key Laboratory of Food Processing of Heilongjiang Province, Harbin, China
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9
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Qi H, Wang T, Li H, Li C, Guan L, Liu W, Wang J, Lu F, Mao S, Qin HM. Sequence- and Structure-Based Mining of Thermostable D-Allulose 3-Epimerase and Computer-Guided Protein Engineering To Improve Enzyme Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:18431-18442. [PMID: 37970673 DOI: 10.1021/acs.jafc.3c07204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
D-Allulose, a functional sweetener, can be synthesized from fructose using D-allulose 3-epimerase (DAEase). Nevertheless, a majority of the reported DAEases have inadequate stability under harsh industrial reaction conditions, which greatly limits their practical applications. In this study, big data mining combined with a computer-guided free energy calculation strategy was employed to discover a novel DAEase with excellent thermostability. Consensus sequence analysis of flexible regions and comparison of binding energies after substrate docking were performed using phylogeny-guided big data analyses. TtDAE from Thermogutta terrifontis was the most thermostable among 358 candidate enzymes, with a half-life of 32 h at 70 °C. Subsequently, structure-guided virtual screening and a customized strategy based on a combinatorial active-site saturation test/iterative saturation mutagenesis were utilized to engineer TtDAE. Finally, the catalytic activity of the M4 variant (P105A/L14C/T63G/I65A) was increased by 5.12-fold. Steered molecular dynamics simulations indicated that M4 had an enlarged substrate-binding pocket, which enhanced the fit between the enzyme and the substrate. The approach presented here, combining DAEases mining with further rational modification, provides guidance for obtaining promising catalysts for industrial-scale production.
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Affiliation(s)
- Hongbin Qi
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Tong Wang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Huimin Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Chao Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Lijun Guan
- Institute of Food Processing, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Weidong Liu
- Industrial Enzymes National Engineering Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China
| | - Jianwen Wang
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
| | - Hui-Min Qin
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, China
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10
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Gao Y, Chen Z, Nakanishi H, Li Z. Highly Efficient Synthesis of Rare Sugars from Glycerol in Endotoxin-Free ClearColi by Fermentation. Foods 2023; 12:3078. [PMID: 37628077 PMCID: PMC10453619 DOI: 10.3390/foods12163078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/13/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
Rare sugars possess potential applications as low-calorie sweeteners, especially for anti-obesity and anti-diabetes. In this study, a fermentation biosystem based on the "DHAP-dependent aldolases strategy" was established for D-allulose and D-sorbose production from glycerol in endotoxin-free ClearColi BL21 (DE3). Several engineering strategies were adopted to enhance rare sugar production. Firstly, the combination of different plasmids for aldO, rhaD, and yqaB expression was optimized. Then, the artificially constructed ribosomal binding site (RBS) libraries of aldO, rhaD, and yqaB genes were assembled individually and combinatorially. In addition, a peroxidase was overexpressed to eliminate the damage or toxicity from hydrogen peroxide generated by alditol oxidase (AldO). Finally, stepwise improvements in rare sugar synthesis were elevated to 15.01 g/L with a high yield of 0.75 g/g glycerol in a 3 L fermenter. This research enables the effective production of rare sugars from raw glycerol in high yields.
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Affiliation(s)
- Yahui Gao
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Zhou Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Hideki Nakanishi
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Zijie Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
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11
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Li C, Gao X, Qi H, Zhang W, Li L, Wei C, Wei M, Sun X, Wang S, Wang L, Ji Y, Mao S, Zhu Z, Tanokura M, Lu F, Qin HM. Substantial Improvement of an Epimerase for the Synthesis of D-Allulose by Biosensor-Based High-Throughput Microdroplet Screening. Angew Chem Int Ed Engl 2023; 62:e202216721. [PMID: 36658306 DOI: 10.1002/anie.202216721] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 01/21/2023]
Abstract
Biosynthesis of D-allulose has been achieved using ketose 3-epimerases (KEases), but its application is limited by poor catalytic performance. In this study, we redesigned a genetically encoded biosensor based on a D-allulose-responsive transcriptional regulator for real-time monitoring of D-allulose. An ultrahigh-throughput droplet-based microfluidic screening platform was further constructed by coupling with this D-allulose-detecting biosensor for the directed evolution of the KEases. Structural analysis of Sinorhizobium fredii D-allulose 3-epimerase (SfDAE) revealed that a highly flexible helix/loop region exposes or occludes the catalytic center as an essential lid conformation regulating substrate recognition. We reprogrammed SfDAE using structure-guided rational design and directed evolution, in which a mutant M3-2 was identified with 17-fold enhanced catalytic efficiency. Our research offers a paradigm for the design and optimization of a biosensor-based microdroplet screening platform.
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Affiliation(s)
- Chao Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Xin Gao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Hongbin Qi
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Wei Zhang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Lei Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Cancan Wei
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Meijing Wei
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Xiaoxuan Sun
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Shusen Wang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Liyan Wang
- Luoyang BIO-Industry Technology Innovation Center, Luoyang, 471000, Henan, China
| | - Yingbin Ji
- Luoyang BIO-Industry Technology Innovation Center, Luoyang, 471000, Henan, China
| | - Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Zhangliang Zhu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Masaru Tanokura
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, 113-8657, Japan
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
| | - Hui-Min Qin
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin, 300457, China
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12
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Li J, Dai Q, Zhu Y, Xu W, Zhang W, Chen Y, Mu W. Low-calorie bulk sweeteners: Recent advances in physical benefits, applications, and bioproduction. Crit Rev Food Sci Nutr 2023; 64:6581-6595. [PMID: 36705477 DOI: 10.1080/10408398.2023.2171362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
At present, with the continuous improvement of living standards, people are paying increasing attention to dietary nutrition and health. Low sugar and low energy consumption have become important dietary trends. In terms of sugar control, more and more countries have implemented sugar taxes in recent years. Hence, as the substitute for sugar, low-calorie sweeteners have been widely used in beverage, bakery, and confectionary industries. In general, low-calorie sweeteners consist of high-intensity and low-calorie bulk sweeteners (some rare sugars and sugar alcohols). In this review, recent advances and challenges in low-calorie bulk sweeteners are explored. Bioproduction of low-calorie bulk sweeteners has become the focus of many researches, because it has the potential to replace the current industrial scale production through chemical synthesis. A comprehensive summary of the physicochemical properties, physiological functions, applications, bioproduction, and regulation of typical low-calorie bulk sweeteners, such as D-allulose, D-tagatose, D-mannitol, sorbitol, and erythritol, is provided.
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Affiliation(s)
- Jin Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Quanyu Dai
- China Rural Technology Development Center, Beijing, China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Wei Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Yeming Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
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13
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Li Z, Feng L, Chen Z, Hu Y, Fei K, Xu H, Gao XD. Efficient enzymatic synthesis of d-allulose using a novel d-allulose-3-epimerase from Caballeronia insecticola. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:339-348. [PMID: 35871484 DOI: 10.1002/jsfa.12147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/19/2022] [Accepted: 07/24/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Rare sugars have become promising 'sugar alternatives' because of their low calories and unique physiological functions. Among the family of rare sugars, d-allulose is one of the sugars attracting interest. Ketose 3-epimerases (KEase), including d-tagatose 3-epimerase (DTEase) and d-allulose 3-epimerase (DAEase), are mainly used for d-allulose production. RESULTS In this study, a putative xylose isomerase from Caballeronia insecticola was characterized and identified as a novel DAEase. Caballeronia insecticola DAEase displayed prominent enzymatic properties, and 150 g L-1 d-allulose was produced from 500 g L-1 d-fructose in 45 min with a conversion rate of 30% and high productivity of 200 g L-1 h-1 . Furthermore, DAEase was employed in a phosphorylation-dephosphorylation cascade reaction, which significantly increased the conversion rate of d-allulose. Under optimized conditions, the conversion rate of d-allulose was approximately 100% when the concentration of d-fructose was 50 mmol L-1 . CONCLUSION This research described a very beneficial and facile approach for d-allulose production based on C. insecticola DAEase. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Zijie Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Linxue Feng
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhou Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Yangfan Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Kangqing Fei
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Huilin Xu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xiao-Dong Gao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
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14
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Zhang W, Wei M, Sun X, Lu F, Guan L, Mao S, Qin HM. Fine-Tuning of Carbon Flux and Artificial Promoters in Bacillus subtilis Enables High-Level Biosynthesis of d-Allulose. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:13935-13944. [PMID: 36278912 DOI: 10.1021/acs.jafc.2c05585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
d-Allulose is an attractive rare sugar that can be used as a low-calorie sweetener with significant health benefits. To meet the increasing market demands, it is necessary to develop an efficient and extensive microbial fermentation platform for the synthesis of d-allulose. Here, we applied a comprehensive systematic engineering strategy in Bacillus subtilis WB600 by introducing d-allulose 3-epimerase (DAEase), combined with the deactivation of fruA, levDEFG, and gmuE, to balance the metabolic network for the efficient production of d-allulose. This resulting strain initially produced 3.24 g/L of d-allulose with a yield of 0.93 g of d-allulose/g d-fructose. We further screened and obtained a suitable dual promoter combination and performed fine-tuning of its spacer region. After 64 h of fed-batch fermentation, the optimized engineered B. subtilis produced d-allulose at titers of 74.2 g/L with a yield of 0.93 g/g and a conversion rate of 27.6%. This d-allulose production strain is a promising platform for the industrial production of rare sugar.
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Affiliation(s)
- Wei Zhang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Meijing Wei
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Xiaoxuan Sun
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Lijun Guan
- Institute of Food Processing, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Hui-Min Qin
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
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15
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Wen X, Ning Y, Lin H, Ren Y, Li C, Liu Y, Zhang C, Lin J, Lin J. d-Allulose (d-psicose) biotransformation from d-glucose, separation by simulated moving bed chromatography (SMBC) and purification by crystallization. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.05.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Immobilization of D-allulose 3-epimerase into magnetic metal-organic framework nanoparticles for efficient biocatalysis. World J Microbiol Biotechnol 2022; 38:144. [PMID: 35748959 DOI: 10.1007/s11274-022-03330-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 06/06/2022] [Indexed: 10/17/2022]
Abstract
D-allulose is a rare low-calorie sugar that has many fundamental biological functions. D-allulose 3-epimerase from Agrobacterium tumefaciens (AT-DAEase) catalyzes the conversion of D-fructose to D-allulose. The enzyme has attracted considerable attention because of its mild catalytic properties. However, the bioconversion efficiency and reusability of AT-DAEase limit its industrial application. Magnetic metal-organic frameworks (MOFs) have uniform pore sizes and large surface areas and can facilitate mass transport and enhance the capacity for enzyme immobilization. Here, we successfully encapsulated cobalt-type AT-DAEase into the cobalt-based magnetic MOF ZIF-67@Fe3O4 using a self-assembly strategy. We confirmed the immobilization of enzyme AT-DAEase and characterized the enzymatic properties of the MOF-immobilized AT-DAEase@ZIF-67@Fe3O4. The AT-DAEase@ZIF-67@Fe3O4 nanoparticles had higher catalytic activity (65.1 U mg-1) and bioconversion ratio (38.1%) than the free AT-DAEase. The optimal conditions for maximum enzyme activity of the AT-DAEase@ZIF-67@Fe3O4 nanoparticles were 55 °C and pH 8.0, which were significantly higher than those of the free AT-DAEase (50 °C and pH 7.5). The AT-DAEase@ZIF-67@Fe3O4 nanoparticles displayed significantly improved thermal stability and excellent recycling performance, with 80% retention of enzyme activity at a temperature range of 45-70 °C and > 45% of its initial activity after eight cycles of enzyme use. The AT-DAEase@ZIF-67@Fe3O4 nanoparticles have great potential for large-scale industrial preparation of D-allulose by immobilizing cobalt-type AT-DAEase into magnetic MOF ZIF-67@Fe3O4.
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17
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Laksmi FA, Nirwantono R, Nuryana I, Agustriana E. Expression and characterization of thermostable D-allulose 3-epimerase from Arthrobacter psychrolactophilus (Ap DAEase) with potential catalytic activity for bioconversion of D-allulose from d-fructose. Int J Biol Macromol 2022; 214:426-438. [PMID: 35750099 DOI: 10.1016/j.ijbiomac.2022.06.117] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/05/2022] [Accepted: 06/16/2022] [Indexed: 01/14/2023]
Abstract
A novel D-allulose 3-epimerase (DAEase) from Arthrobacter psychrolactophilus (Ap DAEase) was first characterized in this study. The enzyme catalyzes the epimerization of d-fructose into a functional rare sugar, D-allulose. Ap DAEase was the first record of DAEase identified as a homotrimer with the molecular weight of its subunit at approximately 34 kDa. It had an optimum activity at pH 8.5 and 70 °C in the presence of 1 mM Mg2+. Ap DAEase was found to be an excellent thermostable enzyme. The half-life value at 70 °C was 128.4 min. The kcat and catalytic efficiency of the enzyme toward d-fructose were 2920.00 s-1 and 3.953 mM-1 s-1, respectively. To the best of our knowledge, Ap DAEase possesses the highest kcat among the previously reported DAEases. The conversion ratio of 500 and 100 mg L-1d-fructose to D-allulose was approximately 27 % in 15 and 90 min, respectively. These research findings suggest that Ap DAEase is a promising candidate for the industrial production of D-allulose.
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Affiliation(s)
- Fina Amreta Laksmi
- Research Center for Applied Microbiology, National Research and Innovation Agency (BRIN), Jl. Raya Bogor, Km. 46, Cibinong, Bogor Regency 16911, Indonesia.
| | - Rudi Nirwantono
- Research Center for Applied Microbiology, National Research and Innovation Agency (BRIN), Jl. Raya Bogor, Km. 46, Cibinong, Bogor Regency 16911, Indonesia; School of Chemistry and Molecular Bioscience, University of Queensland, Chemistry Bld, 68 Cooper Rd, Brisbane, QLD 4072, Australia
| | - Isa Nuryana
- Research Center for Applied Microbiology, National Research and Innovation Agency (BRIN), Jl. Raya Bogor, Km. 46, Cibinong, Bogor Regency 16911, Indonesia
| | - Eva Agustriana
- Research Center for Applied Microbiology, National Research and Innovation Agency (BRIN), Jl. Raya Bogor, Km. 46, Cibinong, Bogor Regency 16911, Indonesia.
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Sharma N, Kumari R, Thakur M, Rai AK, Singh SP. Molecular dissemination of emerging antibiotic, biocide, and metal co-resistomes in the Himalayan hot springs. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 307:114569. [PMID: 35091250 DOI: 10.1016/j.jenvman.2022.114569] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/11/2022] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Growing resistance among microbial communities against antimicrobial compounds, especially antibiotics, is a significant threat to living beings. With increasing antibiotic resistance in human pathogens, it is necessary to examine the habitats having community interests. In the present study, a metagenomic approach has been employed to understand the causes, dissemination, and effects of antibiotic, metal, and biocide resistomes on the microbial ecology of three hot springs, Borong, Lingdem, and Yumthang, located at different altitudes of the Sikkim Himalaya. The taxonomic assessment of these hot springs depicted the predominance of mesophilic organisms, mainly belonging to the phylum Proteobacteria. The enriched microbial metabolism assosiated with energy, cellular processes, adaptation to diverse environments, and defence were deciphered in the metagenomes. The genes representing resistance to semisynthetic antibiotics, e.g., aminoglycosides, fluoroquinolones, fosfomycin, vancomycin, trimethoprim, tetracycline, streptomycin, beta-lactams, multidrug resistance, and biocides such as triclosan, hydrogen peroxide, acriflavin, were abundantly present. Various genes attributing resistance to copper, arsenic, iron, and mercury in metal resistome were detected. Relative abundance, correlation, and genome mapping of metagenome-assembled genomes indicated the co-evolution of antibiotic and metal resistance in predicted novel species belonging to Vogesella, Thiobacillus, and Tepidimona genera. The metagenomic findings were further validated with isolation of microbial cultures, exhibiting resistance against antibiotics and heavy metals, from the hot spring water samples. The study furthers our understanding about the molecular basis of co-resistomes in the ceological niches and their possible impact on the environment.
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Affiliation(s)
- Nitish Sharma
- Center of Innovative and Applied Bioprocessing, SAS Nagar, Mohali, India; Department of Biotechnology, Panjab University, Chandigarh, India
| | - Reena Kumari
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India
| | - Monika Thakur
- Center of Innovative and Applied Bioprocessing, SAS Nagar, Mohali, India; Department of Biotechnology, Panjab University, Chandigarh, India
| | - Amit K Rai
- Institute of Bioresources and Sustainable Development, Regional Centre, Tadong, Sikkim, India.
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing, SAS Nagar, Mohali, India.
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Feng Y, Pu Z, Zhu L, Wu M, Yang L, Yu H, Lin J. Enhancing the thermostability of D-allulose 3-epimerase from Clostridium cellulolyticum H10 via a dual-enzyme screening system. Enzyme Microb Technol 2022; 159:110054. [DOI: 10.1016/j.enzmictec.2022.110054] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/09/2022] [Accepted: 04/21/2022] [Indexed: 12/30/2022]
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20
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Chen J, Chen D, Chen Q, Xu W, Zhang W, Mu W. Computer-Aided Targeted Mutagenesis of Thermoclostridium caenicola d-Allulose 3-Epimerase for Improved Thermostability. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1943-1951. [PMID: 35107285 DOI: 10.1021/acs.jafc.1c07256] [Citation(s) in RCA: 33] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
d-Allulose 3-epimerase (DAEase) is a key enzyme in d-allulose bioproduction. DAEase from Thermoclostridium caenicola suffers from poor thermostability, hampering its large-scale applications in industry. In this study, mutants A70P, G107P, F155Y, and D162T with increased melting point temperature (Tm) were obtained by targeted mutagenesis based on the calculation of the free energy of folding. The optimal single-point mutant G107P showed 11.08 h, 5, and 5.70 °C increases in the values of half-life (t1/2) at 60 °C, the optimum temperature (Topt), and Tm, respectively. Beneficial mutations were combined by ordered recombination mutagenesis, and the combinational mutant Var3 (G107P/F155Y/D162T/A70P) was generated with ΔTopt of 10 °C and ΔTm of 12.25 °C. Its t1/2 value at 65 °C was more than 140 times higher than that of the wild-type enzyme. Molecular dynamics simulations and homology modeling analysis indicated that the enhanced overall rigidity, increased hydrogen bonds between subunits, and redistributed surface electrostatic charges might be responsible for the improved thermostability of the mutant Var3.
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Affiliation(s)
- Jiajun Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Ding Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Qiuming Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wei Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- Shandong Haizhibao Ocean Technology Co., Ltd, Weihai, Shandong 264333, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
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21
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Chen X, Wang F, Yu Q, Liu S, Wang W, Zhang Y, Wang Z, Yuan Z. One pot cascade biosynthesis of d-allulose from d-glucose and its kinetic modelling. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117167] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Synthetic biology: a new frontier in food production. Trends Biotechnol 2022; 40:781-803. [PMID: 35120749 DOI: 10.1016/j.tibtech.2022.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 12/29/2021] [Accepted: 01/04/2022] [Indexed: 02/07/2023]
Abstract
Concerns regarding food security arise from population growth, global warming, and reduction in arable land. With advances in synthetic biology, food production by microbes is considered to be a promising alternative that would allow rapid food production in an environmentally friendly manner. Moreover, synthetic biology can be adopted to the production of healthier or specifically designed food ingredients (e.g., high-value proteins, lipids, and vitamins) and broaden the utilization of feedstocks (e.g., methanol and CO2), thereby offering potential solutions to high-quality food and the greenhouse effect. We first present how synthetic biology can facilitate the microbial production of various food components, and then discuss feedstock availability enabled by synthetic biology. Finally, we illustrate trends and key challenges in synthetic biology-driven food production.
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Zhang W, Chen D, Chen J, Xu W, Chen Q, Wu H, Guang C, Mu W. D-allulose, a versatile rare sugar: recent biotechnological advances and challenges. Crit Rev Food Sci Nutr 2021; 63:5661-5679. [PMID: 34965808 DOI: 10.1080/10408398.2021.2023091] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
D-Allulose is the C-3 epimer of D-fructose, and widely regarded as a promising substitute for sucrose. It's an excellent low-calorie sweetener, with 70% sweetness of sucrose, 0.4 kcal/g dietary energy, and special physiological functions. It has been approved as GRAS by the U.S. Food and Drug Administration, and is allowed to be excluded from total and added sugar counts on the food labels. Therefore, D-allulose gradually attracts more public attention. Owing to scarcity in nature, the bioproduction of D-allulose by using ketose 3-epimerase (KEase) has become the research hotspot. Herein, we give a summary of the physicochemical properties, physiological function, applications, and the chemical and biochemical synthesis methods of D-allulose. In addition, the recent progress in the D-allulose bioproduction using KEases, and the possible solutions for existing challenges in the D-allulose industrial production are comprehensively discussed, focusing on the molecular modification, immobilization, food-grade expression, utilizing low-cost biomass as feedstock, overcoming thermodynamic limitation, as well as the downstream separation and purification. Finally, Prospects for further development are also proposed.
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Affiliation(s)
- Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Ding Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Jiajun Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Wei Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Qiuming Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Hao Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Cuie Guang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, China
- Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
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Seo MJ, Kwon ER, Kim SJ, Choi MS, Kim YS, Park CS. d-Allulose Production from d-fructose by Putative Dolichol Phosphate Mannose Synthase from Bacillus sp. with Potential d-allulose 3-epimrase Activity. BIOTECHNOL BIOPROC E 2021. [DOI: 10.1007/s12257-021-0007-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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25
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Chen D, Chen J, Liu X, Guang C, Zhang W, Mu W. Biochemical identification of a hyperthermostable l-ribulose 3-epimerase from Labedella endophytica and its application for d-allulose bioconversion. Int J Biol Macromol 2021; 189:214-222. [PMID: 34428486 DOI: 10.1016/j.ijbiomac.2021.08.131] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/17/2021] [Accepted: 08/17/2021] [Indexed: 10/20/2022]
Abstract
Currently, low sugar and low energy have become an important trend in the food industries. Therefore, the bioconversion of the functional low-calorie rare sugars attracts more and more attention. l-Ribulose 3-epimerase (LREase) belongs to the ketose 3-epimerase (KEase) family, which could not only efficiently catalyze the reversible C-3 epimerization between l-ribulose and l-xylulose but also between d-fructose and d-allulose. In this paper, a hyperthermostable LREase from Labedella endophytica was identified and characterized. It exhibited maximum catalytic activity at pH 6.0 and 80 °C with 1 mM Ni2+. In the presence of Co2+, the t1/2 values at 60, 65, and 70 °C were 37.7, 9.0, and 4.6 h, respectively, and Tm value was 80.9 °C. From 500 g/L d-fructose, it could produce 154.2 g/L d-allulose with a conversion rate of 30.8% in 10 h. In view of its strong thermostability and high catalytic efficiency, L. endophytica LREase might be a good potential alternative for d-allulose industrial production.
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Affiliation(s)
- Ding Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jiajun Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Xiaoyong Liu
- Shandong Haizhibao Ocean Technology Co., Ltd, Weihai, Shandong 264333, China
| | - Cuie Guang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China; Shandong Haizhibao Ocean Technology Co., Ltd, Weihai, Shandong 264333, China.
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
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Hu M, Li M, Jiang B, Zhang T. Bioproduction of D-allulose: Properties, applications, purification, and future perspectives. Compr Rev Food Sci Food Saf 2021; 20:6012-6026. [PMID: 34668314 DOI: 10.1111/1541-4337.12859] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/07/2021] [Accepted: 09/17/2021] [Indexed: 11/29/2022]
Abstract
D-allulose is the C-3 epimer of D-fructose, which rarely exists in nature, and can be biosynthesized from D-fructose by the catalysis of D-psicose 3-epimerase. D-allulose is safe for human consumption and was recently approved by the United States Food and Drug Administration for food applications. It is not only able be used in food and dietary supplements as a low-calorie sweetener, but also modulates a variety of physiological functions. D-allulose has gained increasing attention owing to its excellent properties. This article presents a review of recent progress on the properties, applications, and bioproduction progress of D-allulose.
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Affiliation(s)
- Mengying Hu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Mengli Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Bo Jiang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Tao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu, 214122, China
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27
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Li C, Zhang W, Wei C, Gao X, Mao S, Lu F, Qin HM. Continuous Spectrophotometric Assay for High-Throughput Screening of Predominant d-Allulose 3-Epimerases. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:11637-11645. [PMID: 34569239 DOI: 10.1021/acs.jafc.1c04716] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
d-Allulose is an attractive noncaloric sugar substitute with numerous health benefits, which can be biosynthesized by d-allulose 3-epimerases (DAEases). However, enzyme instability under harsh industrial reaction conditions hampered its practical applications. Here, we developed a continuous spectrophotometric assay (CSA) for the efficient analysis of d-allulose in a mixture. Furthermore, a high-throughput screening strategy for DAEases was developed using CSA by coupling DAEase with a NADH-dependent ribitol dehydrogenase, enabling high-throughput screening of DAEase variants with desired properties. The variant M15S/P40N/S209N exhibited a half-life of 22 h at 60 °C and an 8.7 °C increase of the T5060 value, with a 1.2-fold increase of activity. Structural modeling and molecular dynamics simulations indicated that the improvement of thermostability and activity was due to some new hydrogen bonds between chains at the dimer interface and between the residue and the substrate d-fructose. This work offers a robust tool and theoretical basis for the improvement of DAEases, which will benefit the enzymatic biosynthesis of d-allulose and promote its industrial application.
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Affiliation(s)
- Chao Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Wei Zhang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Cancan Wei
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Xin Gao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
| | - Hui-Min Qin
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education; Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology; National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, P. R. China
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28
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Xia Y, Cheng Q, Mu W, Hu X, Sun Z, Qiu Y, Liu X, Wang Z. Research Advances of d-allulose: An Overview of Physiological Functions, Enzymatic Biotransformation Technologies, and Production Processes. Foods 2021; 10:2186. [PMID: 34574296 PMCID: PMC8467252 DOI: 10.3390/foods10092186] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/08/2021] [Accepted: 09/12/2021] [Indexed: 02/02/2023] Open
Abstract
d-allulose has a significant application value as a sugar substitute, not only as a food ingredient and dietary supplement, but also with various physiological functions, such as improving insulin resistance, anti-obesity, and regulating glucolipid metabolism. Over the decades, the physiological functions of d-allulose and the corresponding mechanisms have been studied deeply, and this product has been applied to various foods to enhance food quality and prolong shelf life. In recent years, biotransformation technologies for the production of d-allulose using enzymatic approaches have gained more attention. However, there are few comprehensive reviews on this topic. This review focuses on the recent research advances of d-allulose, including (1) the physiological functions of d-allulose; (2) the major enzyme families used for the biotransformation of d-allulose and their microbial origins; (3) phylogenetic and structural characterization of d-allulose 3-epimerases, and the directed evolution methods for the enzymes; (4) heterologous expression of d-allulose ketose 3-epimerases and biotransformation techniques for d-allulose; and (5) production processes for biotransformation of d-allulose based on the characterized enzymes. Furthermore, the future trends on biosynthesis and applications of d-allulose in food and health industries are discussed and evaluated in this review.
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Affiliation(s)
- Yu Xia
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (W.M.); (Z.W.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Q.C.); (Z.S.); (Y.Q.); (X.L.)
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Qianqian Cheng
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Q.C.); (Z.S.); (Y.Q.); (X.L.)
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (W.M.); (Z.W.)
| | - Xiuyu Hu
- China Biotech Fermentation Industry Association, Beijing 100833, China;
| | - Zhen Sun
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Q.C.); (Z.S.); (Y.Q.); (X.L.)
| | - Yangyu Qiu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Q.C.); (Z.S.); (Y.Q.); (X.L.)
| | - Ximing Liu
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Q.C.); (Z.S.); (Y.Q.); (X.L.)
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (W.M.); (Z.W.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Q.C.); (Z.S.); (Y.Q.); (X.L.)
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
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29
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Zhu Z, Li L, Zhang W, Li C, Mao S, Lu F, Qin HM. Improving the enzyme property of D-allulose 3-epimerase from a thermophilic organism of Halanaerobium congolense through rational design. Enzyme Microb Technol 2021; 149:109850. [PMID: 34311887 DOI: 10.1016/j.enzmictec.2021.109850] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/29/2021] [Accepted: 06/08/2021] [Indexed: 01/14/2023]
Abstract
The rare sugar d-allulose is an attractive sucrose substitute due to its sweetness and ultra-low caloric value. It can be produced from D-fructose using d-allulose 3-epimerase (DAE) as the biocatalyst. However, most of the reported DAEs show low catalytic efficiency and poor thermostability, which limited their further use in food industrial. Here, a putative d-allulose 3-epimerase from a thermophilic organism of Halanaerobium congolense (HcDAE) was characterized, showing optimal activity at pH 8.0 and 70 °C in the presence of Mg2+. Saturation mutagenesis of Y7, C66, and I108, the putative residues responsible for substrate recognition at the O-4, -5, and -6 atoms of D-fructose was performed, and it yielded the triple mutant Y7H/C66L/I108A with improved activity toward D-fructose (345 % of wild-type enzyme). The combined mutant Y7H/C66L/I108A/R156C/K260C exhibited a half-half (t1/2) of 5.2 h at 70 °C and an increase of the Tm value by 6.5 °C due to the introduction of disulfide bridges between intersubunit with increased interface interactions. The results indicate that mutants could be used as industrial biocatalysts for d-allulose production.
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Affiliation(s)
- Zhangliang Zhu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China
| | - Lei Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China
| | - Wei Zhang
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China
| | - Chao Li
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China
| | - Shuhong Mao
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China.
| | - Fuping Lu
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China.
| | - Hui-Min Qin
- Key Laboratory of Industrial Fermentation Microbiology of the Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, College of Biotechnology, Tianjin University of Science and Technology, National Engineering Laboratory for Industrial Enzymes, Tianjin 300457, PR China.
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30
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Jia DX, Sun CY, Jin YT, Liu ZQ, Zheng YG, Li M, Wang HY, Chen DS. Properties of d-allulose 3-epimerase mined from Novibacillus thermophilus and its application to synthesis of d-allulose. Enzyme Microb Technol 2021; 148:109816. [PMID: 34116747 DOI: 10.1016/j.enzmictec.2021.109816] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/15/2021] [Accepted: 05/01/2021] [Indexed: 01/20/2023]
Affiliation(s)
- Dong-Xu Jia
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China; Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China
| | - Chen-Yi Sun
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China; Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China
| | - Yi-Ting Jin
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China; Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China
| | - Zhi-Qiang Liu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China; Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China.
| | - Yu-Guo Zheng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China; Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, PR China
| | - Mian Li
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324032, PR China
| | - Hong-Yan Wang
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324032, PR China
| | - De-Shui Chen
- Zhejiang Huakang Pharmaceutical Co., Ltd., Kaihua, 324032, PR China
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31
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Patel SN, Kaushal G, Singh SP. D-Allulose 3-epimerase of Bacillus sp. origin manifests profuse heat-stability and noteworthy potential of D-fructose epimerization. Microb Cell Fact 2021; 20:60. [PMID: 33663507 PMCID: PMC7934257 DOI: 10.1186/s12934-021-01550-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 02/18/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND D-Allulose is an ultra-low calorie sugar of multifarious health benefits, including anti-diabetic and anti-obesity potential. D-Allulose 3-epimerase family enzymes catalyze biosynthesis of D-allulose via epimerization of D-fructose. RESULTS A novel D-allulose 3-epimerase (DaeB) was cloned from a plant probiotic strain, Bacillus sp. KCTC 13219, and expressed in Bacillus subtilis cells. The purified protein exhibited substantial epimerization activity in a broad pH spectrum, 6.0-11.0. DaeB was able to catalyze D-fructose to D-allulose bioconversion at the temperature range of 35 °C to 70 °C, exhibiting at least 50 % activity. It displaced excessive heat stability, with the half-life of 25 days at 50 °C, and high turnover number (kcat 367 s- 1). The coupling of DaeB treatment and yeast fermentation of 700 g L- 1 D-fructose solution yielded approximately 200 g L- 1 D-allulose, and 214 g L- 1 ethanol. CONCLUSIONS The novel D-allulose 3-epimerase of Bacillus sp. origin discerned a high magnitude of heat stability along with exorbitant epimerization ability. This biocatalyst has enormous potential for the large-scale production of D-allulose.
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Affiliation(s)
- Satya Narayan Patel
- Center of Innovative and Applied Bioprocessing, S.A.S. Nagar, Sector-81 (Knowledge City), 140306, Mohali, India
| | - Girija Kaushal
- Center of Innovative and Applied Bioprocessing, S.A.S. Nagar, Sector-81 (Knowledge City), 140306, Mohali, India
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing, S.A.S. Nagar, Sector-81 (Knowledge City), 140306, Mohali, India.
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Thakur M, Sharma N, Rai AK, Singh SP. A novel cold-active type I pullulanase from a hot-spring metagenome for effective debranching and production of resistant starch. BIORESOURCE TECHNOLOGY 2021; 320:124288. [PMID: 33120064 DOI: 10.1016/j.biortech.2020.124288] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/13/2020] [Accepted: 10/15/2020] [Indexed: 06/11/2023]
Abstract
Pullulanase is a potent enzyme for starch debranching. In this study, a novel type I pullulanase (PulM) was identified from the metagenome of a thermal aquatic habitat that exhibits optimal activity of debranching at 40 °C temperature and pH 6.0 to 7.0. More than 50% enzymatic activity was detected at the low temperature of 4 °C, determining it a cold-active type I pullulanase. It was able to efficiently catalyze the hydrolysis of α-1,6-glycosidic linkages in pullulan, with a specific activity of 177 U mg-1. The results determined PulM to be a potential starch debranching biocatalyst, causing a significant increase of about 80% in the apparent amylose content of potato starch. Retrogradation of the debranched starch resulted in the formation of resistant starch 3. The yield of resistant starch was estimated to be about 45%. The resistant starch exhibited higher crystallinity, enhanced heat-stability, and resistance to α-amylase digestion, as compared to native starch.
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Affiliation(s)
- Monika Thakur
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), SAS Nagar, Sector 81, Mohali, India; Department of Biotechnology, Panjab University, Chandigarh, India
| | - Nitish Sharma
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), SAS Nagar, Sector 81, Mohali, India; Department of Biotechnology, Panjab University, Chandigarh, India
| | - Amit K Rai
- Institute of Bioresources and Sustainable Development (DBT-IBSD), Sikkim Centre, Tadong, India
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), SAS Nagar, Sector 81, Mohali, India.
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Wang Y, Ravikumar Y, Zhang G, Yun J, Zhang Y, Parvez A, Qi X, Sun W. Biocatalytic Synthesis of D-Allulose Using Novel D-Tagatose 3-Epimerase From Christensenella minuta. Front Chem 2020; 8:622325. [PMID: 33363120 PMCID: PMC7758420 DOI: 10.3389/fchem.2020.622325] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/16/2020] [Indexed: 11/26/2022] Open
Abstract
D-allulose, which is one of the important rare sugars, has gained significant attention in the food and pharmaceutical industries as a potential alternative to sucrose and fructose. Enzymes belonging to the D-tagatose 3-epimerase (DTEase) family can reversibly catalyze the epimerization of D-fructose at the C3 position and convert it into D-allulose by a good number of naturally occurring microorganisms. However, microbial synthesis of D-allulose is still at its immature stage in the industrial arena, mostly due to the preference of slightly acidic conditions for Izumoring reactions. Discovery of novel DTEase that works at acidic conditions is highly preferred for industrial applications. In this study, a novel DTEase, DTE-CM, capable of catalyzing D-fructose into D-allulose was applications. In this study, a novel DTEase, DTE-CM, capable of catalyzing D-fructose into D-allulose was DTE-CM on D-fructose was found to be remarkably influenced and modulated by the type of metal ions (co-factors). The DTE-CM on D-fructose was found to be remarkably influenced and modulated by the type of metal ions (co-factors). The 50°C from 0.5 to 3.5 h at a concentration of 0.1 mM. The enzyme exhibited its maximum catalytic activity on D-fructose at pH 6.0 and 50°C from 0.5 to 3.5 h at a concentration of 0.1 mM. The enzyme exhibited its maximum catalytic activity on -fructose at pH 6.0 and 50°C with a K cat /K m value of 45 mM-1min-1. The 500 g/L D-fructose, which corresponded to 30% conversion rate. With these interesting catalytic properties, this enzyme could be a promising candidate for industrial biocatalytic applications.
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Affiliation(s)
- Yang Wang
- School of Life Science, Jiangsu University, Zhenjiang, China
| | - Yuvaraj Ravikumar
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Guoyan Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Junhua Yun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yufei Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Amreesh Parvez
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Xianghui Qi
- School of Life Science, Jiangsu University, Zhenjiang, China
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Wenjing Sun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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Sharma N, Kumar J, Abedin MM, Sahoo D, Pandey A, Rai AK, Singh SP. Metagenomics revealing molecular profiling of community structure and metabolic pathways in natural hot springs of the Sikkim Himalaya. BMC Microbiol 2020; 20:246. [PMID: 32778049 PMCID: PMC7418396 DOI: 10.1186/s12866-020-01923-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 07/26/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Himalaya is an ecologically pristine environment. The geo-tectonic activities have shaped various environmental niches with diverse microbial populations throughout the Himalayan biosphere region. Albeit, limited information is available in terms of molecular insights into the microbiome, including the uncultured microbes, of the Himalayan habitat. Hence, a vast majority of genomic resources are still under-explored from this region. Metagenome analysis has simplified the extensive in-depth exploration of diverse habitats. In the present study, the culture-independent whole metagenome sequencing methodology was employed for microbial diversity exploration and identification of genes involved in various metabolic pathways in two geothermal springs located at different altitudes in the Sikkim Himalaya. RESULTS The two hot springs, Polok and Reshi, have distinct abiotic conditions. The average temperature of Polok and Reshi was recorded to be 62 °C and 43 °C, respectively. Both the aquatic habitats have alkaline geochemistry with pH in the range of 7-8. Community profile analysis revealed genomic evidence of plentiful bacteria, with a minute fraction of the archaeal population in hot water reservoirs of Polok and Reshi hot spring. Mesophilic microbes belonging to Proteobacteria and Firmicutes phyla were predominant at both the sites. Polok exhibited an extravagant representation of Chloroflexi, Deinococcus-Thermus, Aquificae, and Thermotogae. Metabolic potential analysis depicted orthologous genes associated with sulfur, nitrogen, and methane metabolism, contributed by the microflora in the hydrothermal system. The genomic information of many novel carbohydrate-transforming enzymes was deciphered in the metagenomic description. Further, the genomic capacity of antimicrobial biomolecules and antibiotic resistance were discerned. CONCLUSION The study provided comprehensive molecular information about the microbial treasury as well as the metabolic features of the two geothermal sites. The thermal aquatic niches were found a potential bioresource of biocatalyst systems for biomass-processing. Overall, this study provides the whole metagenome based insights into the taxonomic and functional profiles of Polok and Reshi hot springs of the Sikkim Himalaya. The study generated a wealth of genomic data that can be explored for the discovery and characterization of novel genes encoding proteins of industrial importance.
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Affiliation(s)
- Nitish Sharma
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), SAS Nagar, Mohali, India
- Department of Biotechnology, Panjab University, Chandigarh, India
| | - Jitesh Kumar
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), SAS Nagar, Mohali, India
| | - Md Minhajul Abedin
- Institute of Bioresources and Sustainable Development, Sikkim Centre, Tadong, Gangtok, India
| | - Dinabandhu Sahoo
- Institute of Bioresources and Sustainable Development, Sikkim Centre, Tadong, Gangtok, India
| | - Ashok Pandey
- CSIR-Indian Institute of Toxicology Research, Lucknow, India
| | - Amit K Rai
- Institute of Bioresources and Sustainable Development, Sikkim Centre, Tadong, Gangtok, India.
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), SAS Nagar, Mohali, India.
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Jiang S, Xiao W, Zhu X, Yang P, Zheng Z, Lu S, Jiang S, Zhang G, Liu J. Review on D-Allulose: In vivo Metabolism, Catalytic Mechanism, Engineering Strain Construction, Bio-Production Technology. Front Bioeng Biotechnol 2020; 8:26. [PMID: 32117915 PMCID: PMC7008614 DOI: 10.3389/fbioe.2020.00026] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/13/2020] [Indexed: 01/23/2023] Open
Abstract
Rare sugar D-allulose as a substitute sweetener is produced through the isomerization of D-fructose by D-tagatose 3-epimerases (DTEases) or D-allulose 3-epimerases (DAEases). D-Allulose is a kind of low energy monosaccharide sugar naturally existing in some fruits in very small quantities. D-Allulose not only possesses high value as a food ingredient and dietary supplement, but also exhibits a variety of physiological functions serving as improving insulin resistance, antioxidant enhancement, and hypoglycemic controls, and so forth. Thus, D-allulose has an important development value as an alternative to high-energy sugars. This review provided a systematic analysis of D-allulose characters, application, enzymatic characteristics and molecular modification, engineered strain construction, and processing technologies. The existing problems and its proposed solutions for D-allulose production are also discussed. More importantly, a green and recycling process technology for D-allulose production is proposed for low waste formation, low energy consumption, and high sugar yield.
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Affiliation(s)
- Suwei Jiang
- Department of Biological, Food and Environment Engineering, Hefei University, Hefei, China
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Wei Xiao
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Xingxing Zhu
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Peizhou Yang
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Zhi Zheng
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Shuhua Lu
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Shaotong Jiang
- Anhui Key Laboratory of Intensive Processing of Agricultural Products, College of Food and Biological Engineering, Hefei University of Technology, Hefei, China
| | - Guochang Zhang
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana–Champaign, Urbana, IL, United States
| | - Jingjing Liu
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana–Champaign, Urbana, IL, United States
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