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Choi BY, Seo DH, Hamaker BR, Yoo SH. Enhanced production of turanose using a mutant amylosucrase from Bifidobacterium thermophilum immobilized on silica carriers. Int J Biol Macromol 2024; 282:136981. [PMID: 39476901 DOI: 10.1016/j.ijbiomac.2024.136981] [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: 09/03/2024] [Revised: 10/16/2024] [Accepted: 10/25/2024] [Indexed: 11/05/2024]
Abstract
Turanose (α-d-glucopyranosyl-(1→3)-α-d-fructose) is a rare disaccharide that is a potential low-calorigenic sweetener. This novel sucrose isomer has been efficiently synthesized by the amylosucrase from Bifidobacterium thermophilum (BtAS). In this study, we aimed to enhance turanose biosynthesis by designing a BtAS variant (BtAS-G374S) with improved thermal stability. The BtAS variant was immobilized on porosity-controlled silica carrier, and its enzymatic properties were thoroughly investigated. Using response surface methodology with central composite design, optimal immobilization conditions were determined to significantly boost the biosynthetic efficiency. The BtAS-G374S showed 1.6-fold higher specific activity (2.2 U/mg) than the wild-type enzyme (1.4 U/mg). Additionally, the turanose production yield of BtAS-G374S was significantly enhanced, reaching 65 %, compared to 25 % for the wild-type enzyme when reacting with 2 M sucrose. Immobilization of BtAS-G374S was optimized on controlled porosity carrier (CPC) silica carrier using Response Surface Methodology, achieving an enzyme activity of 7.89 U and an immobilization efficiency of 68.98 % under optimal conditions. Immobilization of BtAS-G374S on CPC silica carriers enhanced its pH and thermal stability. The immobilized enzyme showed a half-life of 50.23 h at 55 °C and retained 68 % of its initial biosynthetic yield after 10 reuses. These properties suggest its potential for efficient industrial turanose production.
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Affiliation(s)
- Bo-Yun Choi
- Department of Food Science and Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Dong-Ho Seo
- Department of Food Science and Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Bruce R Hamaker
- Whistler Center for Carbohydrate Research, Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN 47907, USA
| | - Sang-Ho Yoo
- Department of Food Science and Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea.
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2
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Im JK, Seo DH, Yu JS, Yoo SH. Efficient and novel biosynthesis of myricetin α-triglucoside with improved solubility using amylosucrase from Deinococcus deserti. Int J Biol Macromol 2024; 273:133205. [PMID: 38885871 DOI: 10.1016/j.ijbiomac.2024.133205] [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: 03/14/2024] [Revised: 06/02/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
Although myricetin (3,3',4',5,5',7-hexahydroxyflavone, MYR) has a high antioxidant capacity and health functions, its use as a functional food material is limited owing to its low stability and water solubility. Amylosucrase (ASase) is capable of biosynthesizing flavonol α-glycoside using flavonols as acceptor molecules and sucrose as a donor molecule. Here, ASase from Deinococcus deserti (DdAS) efficiently biosynthesizes a novel MYR α-triglucoside (MYRαG3) using MYR as the acceptor molecule. Comparative homology analysis and computational simulation revealed that DdAS has a different active pocket for the transglycosylation reaction. DdAS produced MYRαG3 with a conversion efficiency of 67.4 % using 10 mM MYR and 50 mM sucrose as acceptor and donor molecules, respectively. The structure of MYRαG3 was identified as MYR 4'-O-4″,6″-tri-O-α-D-glucopyranoside using NMR and LC-MS. In silico analysis confirmed that DdAS has a distinct active pocket compared to other ASases. In addition, molecular docking simulations predicted the synthetic sequence of MYRαG3. Furthermore, MYRαG3 showed a similar DPPH radical scavenging activity of 49 %, comparable to MYR, but with significantly higher water solubility, which increased from 0.03 μg/mL to 511.5 mg/mL. In conclusion, this study demonstrated the efficient biosynthesis of a novel MYRαG3 using DdAS and highlighted the potential of MYRαG3 as a functional material.
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Affiliation(s)
- Joong-Ki Im
- Department of Food Science & Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Dong-Ho Seo
- Department of Food Science & Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Jae Sik Yu
- Department of Integrative Sciences and Industry, Sejong University, Seoul 05006, Republic of Korea
| | - Sang-Ho Yoo
- Department of Food Science & Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea.
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3
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Lee CY, So YS, Lim MC, Jeong S, Yoo SH, Park CS, Jung JH, Seo DH. Characterization of a unique pH-dependent amylosucrase from Deinococcus cellulosilyticus. Int J Biol Macromol 2024; 269:131834. [PMID: 38688341 DOI: 10.1016/j.ijbiomac.2024.131834] [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: 01/04/2024] [Revised: 04/15/2024] [Accepted: 04/22/2024] [Indexed: 05/02/2024]
Abstract
The amylosucrase (ASase, EC 2.4.1.4) utilizes sucrose as the sole substrate to catalyze multifunctional reactions. It can naturally synthesize α-1,4-linked glucans such as amylose as well as sucrose isomers with more favorable properties than sucrose with a lower intestinal digestibility and non-cariogenic properties. The amino acid sequence of the asase gene from Deinococcus cellulosilyticus (DceAS) exhibits low homology with those of other ASases from other Deinococcus species. In this study, we cloned and expressed DceAS and demonstrated its high activity at pH 6 and pH 8 and maintained stability. It showed higher polymerization activity at pH 6 than at pH 8, but similar isomerization activity and produced more turanose and trehalulose at pH 6 than at pH 8 and produced more isomaltulose at pH 8. Furthermore, the molecular weight of DceAS was 226.6 kDa at pH 6 and 145.5 kDa at pH 8, indicating that it existed as a trimer and dimer, respectively under those conditions. Additionally, circular dichroism spectra showed that the DceAS secondary structure was different at pH 6 and pH 8. These differences in reaction products at different pHs can be harnessed to naturally produce sucrose alternatives that are more beneficial to human health.
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Affiliation(s)
- Chang-Young Lee
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Yun-Sang So
- Department of Food Science & Biotechnology and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Min-Cheol Lim
- Research Group of Consumer Safety, Korea Food Research Institute (KFRI), Jeollabuk-do 55365, Republic of Korea
| | - Soyoung Jeong
- Radiation Biotechnology Division, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea; Department of Food and Animal Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
| | - Sang-Ho Yoo
- Department of Food Science & Biotechnology and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Choen-Seok Park
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Jong-Hyun Jung
- Radiation Biotechnology Division, Korea Atomic Energy Research Institute, Jeongeup 56212, Republic of Korea.
| | - Dong-Ho Seo
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea; Department of Food Science & Biotechnology and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea; Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea.
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Kim YJ, So YS, Baik MY, Kim YR, Yoo SH, Seo DH, Park CS. Enzymatic Synthesis of α-Glucan Microparticles Using Amylosucrases from Bifidobacterium Species and Its Physicochemical Properties. Biomacromolecules 2024; 25:2024-2032. [PMID: 38393758 DOI: 10.1021/acs.biomac.3c01417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2024]
Abstract
α-Glucan microparticles (GMPs) have significant potential as high-value biomaterials in various industries. This study proposes a bottom-up approach for producing GMPs using four amylosucrases from Bifidobacterium sp. (BASs). The physicochemical characteristics of these GMPs were analyzed, and the results showed that the properties of the GMPs varied depending on the type of enzymes used in their synthesis. As common properties, all GMPs exhibited typical B-type crystal patterns and poor colloidal dispersion stability. Interestingly, differences in the physicochemical properties of GMPs were generated depending on the synthesis rate of linear α-glucan by the enzymes and the degree of polymerization (DP) distribution. Consequently, we found differences in the properties of GMPs depending on the DP distribution of linear glucans prepared with four BASs. Furthermore, we suggest that precise control of the type and characteristics of the enzymes provides the possibility of producing GMPs with tailored physicochemical properties for various industrial applications.
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Affiliation(s)
- Ye-Jin Kim
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Yun-Sang So
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Moo-Yeol Baik
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Young-Rok Kim
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Sang-Ho Yoo
- Department of Food Science and Biotechnology, Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Dong-Ho Seo
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Cheon-Seok Park
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin 17104, Republic of Korea
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Jun SJ, Lee JA, Kim YW, Yoo SH. Site-Directed Mutagenic Engineering of a Bifidobacterium Amylosucrase toward Greater Efficiency of Turanose Synthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1579-1588. [PMID: 35080876 DOI: 10.1021/acs.jafc.1c06126] [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: 06/14/2023]
Abstract
The aim of this study was to establish one of the most efficient biocatalytic processes for turanose production by applying a robust Bifidobacterium thermophilum (BtAS) mutant developed through site-directed mutagenesis. A gene encoding the amylosucrase of B. thermophilum (BtAS) was cloned and used as a mutagenesis template. Among the BtAS variants generated by the site-directed point mutation, four different single-point mutants (P200R, V202I, Y265F, and Y414F) were selected to create double-point mutants, among which BtASY414F/P200R displayed the greatest turanose productivity without losing the thermostability of native BtAS. The turanose yield of BtASY414F/P200R reached 89.3% at 50 °C after 6 h with 1.0 M sucrose + 1.0 M fructose. BtASY414F/P200R produced significantly more turanose than BtAS-wild type (WT) by 2 times and completed the reaction faster by another 2 times. Thus, turanose productivity (82.0 g/(L h)) by BtASY414F/P200R was highly improved from 28.1 g/(L h) of BtAS-WT with 2.0 M sucrose + 0.75 M fructose.
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Affiliation(s)
- Su-Jin Jun
- Department of Food Science & Biotechnology and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Jung-A Lee
- Department of Food Science & Biotechnology and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
| | - Young-Wan Kim
- Department of Food Science and Biotechnology, Korea University, Sejong 30019, Republic of Korea
| | - Sang-Ho Yoo
- Department of Food Science & Biotechnology and Carbohydrate Bioproduct Research Center, Sejong University, Seoul 05006, Republic of Korea
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Mital S, Christie G, Dikicioglu D. Recombinant expression of insoluble enzymes in Escherichia coli: a systematic review of experimental design and its manufacturing implications. Microb Cell Fact 2021; 20:208. [PMID: 34717620 PMCID: PMC8557517 DOI: 10.1186/s12934-021-01698-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/22/2021] [Indexed: 02/06/2023] Open
Abstract
Recombinant enzyme expression in Escherichia coli is one of the most popular methods to produce bulk concentrations of protein product. However, this method is often limited by the inadvertent formation of inclusion bodies. Our analysis systematically reviews literature from 2010 to 2021 and details the methods and strategies researchers have utilized for expression of difficult to express (DtE), industrially relevant recombinant enzymes in E. coli expression strains. Our review identifies an absence of a coherent strategy with disparate practices being used to promote solubility. We discuss the potential to approach recombinant expression systematically, with the aid of modern bioinformatics, modelling, and ‘omics’ based systems-level analysis techniques to provide a structured, holistic approach. Our analysis also identifies potential gaps in the methods used to report metadata in publications and the impact on the reproducibility and growth of the research in this field.
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Affiliation(s)
- Suraj Mital
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB3 0AS, UK
| | - Graham Christie
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB3 0AS, UK
| | - Duygu Dikicioglu
- Department of Biochemical Engineering, University College London, London, WC1E 6BT, UK.
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Agarwal N, Rai AK, Singh SP. Biotransformation of hydroquinone into α-arbutin by transglucosylation activity of a metagenomic amylosucrase. 3 Biotech 2021; 11:362. [PMID: 34295607 DOI: 10.1007/s13205-021-02909-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 06/24/2021] [Indexed: 11/28/2022] Open
Abstract
Arbutin is a naturally occurring glycosylated product of hydroquinone. With the ability to interrupt melanin biosynthesis in epidermal cells, it is a promising cosmetic ingredient. In this study, a novel amylosucrase, Asmet, identified from a thermal spring metagenome, has been characterized for arbutin biosynthesis. Asmet was able to catalyze transglucosylation of hydroquinone to arbutin, taking sucrose as glycosyl donor, in the temperature range of 20 °C to 40 °C and pH 5.0 to 6.0, with the relative activity of 80% or more. The presence of chloride salts of Li, K, and Na at 1 mM concentration did not exhibit any notable effect on the enzyme's activity, unlike Cu, Ni, and Mn, which were observed to be detrimental. The hydroquinone (20 mM) to sucrose ratio of 1:1 to 1:10 was appropriate for the catalytic biosynthesis of arbutin. The maximum hydroquinone to arbutin conversion of 70% was obtained in 24 h of Asmet led catalysis, at 30 °C and pH 6.0. Arbutin production was also demonstrated using low-cost feedstock, table sugar, muscovado, and sweet sorghum stalk extract, as a replacement for sucrose. Whole-cell catalysis of hydroquinone to arbutin transglucosylation was also established.
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Affiliation(s)
- Neera Agarwal
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), Sector-81 (Knowledge City), Mohali, S.A.S. Nagar, 140 306 Punjab India
- Department of Biotechnology, Panjab University, Chandigarh, Punjab India
| | - Amit K Rai
- Institute of Bioresources and Sustainable Development (DBT-IBSD), Sikkim Centre, Tadong, Sikkim India
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing (DBT-CIAB), Sector-81 (Knowledge City), Mohali, S.A.S. Nagar, 140 306 Punjab India
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Kim YJ, Siziya IN, Hong S, Lee GY, Seo MJ, Kim YR, Yoo SH, Park CS, Seo DH. Biosynthesis of glyceride glycoside (nonionic surfactant) by amylosucrase, a powerful glycosyltransferase. Food Sci Biotechnol 2021; 30:267-276. [PMID: 33732517 DOI: 10.1007/s10068-020-00861-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/16/2020] [Accepted: 12/03/2020] [Indexed: 02/07/2023] Open
Abstract
Amylosucrase (ASase, E.C. 2.4.1.4) is a powerful transglycosylation enzyme that can transfer glucose from sucrose to the hydroxyl (-OH) group of various compounds. In this study, recombinant ASases from Deinococcus geothermalis (DgAS) and Bifidobacterium thermophilum (BtAS) were used to synthesize biosurfactants based on the computational analysis of predicted docking simulations. Successful predictions of the binding affinities, conformations, and three-dimensional structures of three surfactants were computed from receptor-ligand binding modes. DgAS and BtAS were effective in the synthesis of biosurfactants from glyceryl caprylate, glyceryl caprate, and polyglyceryl-2 caprate. The results of the transglycosylation reaction were consistent for both ASases, with glyceryl caprylate acceptor showing the highest concentration, as confirmed by thin layer chromatography. Furthermore, the transglycosylation reactions of DgAS were more effective than those of BtAS. Among the three substrates, glyceryl caprylate glycoside and glyceryl caprate glycoside were successfully purified by liquid chromatography-mass spectrometry (LC-MS) with the corresponding molecular weights.
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Affiliation(s)
- Ye-Jin Kim
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin, 17104 Republic of Korea
| | - Inonge Noni Siziya
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju, 54896 Republic of Korea
| | - Seungpyo Hong
- Research Group of Healthcare, Korea Food Research Institute, Wanju, 55365 Republic of Korea
| | - Gil-Yong Lee
- Healthcare Research Institute, Kolon Industries, Inc, Seoul, 07793 Republic of Korea
| | - Myung-Ji Seo
- Division of Bioengineering, Incheon National University, Incheon, 22012 Republic of Korea
| | - Young-Rok Kim
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin, 17104 Republic of Korea
| | - Sang-Ho Yoo
- Department of Food Science and Biotechnology, and Carbohydrate Bioproduct Research Center, Sejong University, Seoul, 05006 Republic of Korea
| | - Cheon-Seok Park
- Department of Food Science and Biotechnology, Graduate School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Yongin, 17104 Republic of Korea
| | - Dong-Ho Seo
- Department of Food Science and Technology, College of Agriculture and Life Sciences, Jeonbuk National University, Jeonju, 54896 Republic of Korea.,Department of Agricultural Convergence Technology, Jeonbuk National University, Jeonju, 54896 Republic of Korea.,Institute of Agricultural Science and Technology, Jeonbuk National University, Jeonju, 54896 Republic of Korea
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