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Zheng L, Jiang B, Chen J, Zhang T, Gu X, Pan Y. Efficient biotransformation and synergetic mechanism of dual-enzyme cascade reaction in nonreducing maltoheptaose synthesis. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Chen C, Su L, Wu L, Zhou J, Wu J. Enhanced the catalytic efficiency and thermostability of maltooligosyltrehalose synthase from Arthrobacter ramosus by directed evolution. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lakshmi SA, Shafreen RB, Balaji K, Ibrahim KS, Shiburaj S, Gayathri V, Pandian SK. Cloning, expression, homology modelling and molecular dynamics simulation of four domain-containing α-amylase from Streptomyces griseus. J Biomol Struct Dyn 2020; 39:2152-2163. [PMID: 32193988 DOI: 10.1080/07391102.2020.1745282] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In the present study, α-amylase from Streptomyces griseus TBG19NRA1 was amplified, cloned and successfully expressed in E. coli BL21/DE3. Sequence analysis of S. griseus α-amylase (SGAmy) revealed the presence of four domains (A, B, C and E). Alpha-amylases with E domain (also known as carbohydrate binding module 20 (CBM20)) are capable of degrading raw starch and this property holds great potential for application in starch processing industries. Though α-amylase is a well-studied and characterized enzyme, there is no experimental structure available for this four domain-containing α-amylases. To gain more insight about SGAmy structure and function, homology modelling was performed using a multi-template method. The template α-amylase from Pseudoalteromonas haloplanktis (PDB ID 1AQH) and E domain of Cyclodextrin glucanotransferase from Bacillus circulans (PDB ID 1CGY) was found to have significant similarity with the complete target sequence of SGAmy. Therefore, homology model for SGAmy was generated from the crystal structure of 1AQH and 1CGY and the resulting structure was subjected to 10 ns molecular dynamics (MD) simulation. Remarkably, CBM20 domain of SGAmy showed greater flexibility in MD simulation than other three domains. This observation is highly rational as this part of SGAmy is strongly implicated in substrate (raw starch) binding. Thus, conformational plasticity at CBM20 is functionally beneficial.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | | | - Kannan Balaji
- Department of Biotechnology, Alagappa University, Karaikudi, Tamil Nadu, India
| | - Kalibulla Syed Ibrahim
- PG and Research Department of Botany, PSG College of Arts & Science, Coimbatore, Tamil Nadu, India
| | - Sugathan Shiburaj
- Division of Microbiology, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram, Kerala, India
| | - Valsala Gayathri
- Division of Microbiology, Jawaharlal Nehru Tropical Botanic Garden and Research Institute, Palode, Thiruvananthapuram, Kerala, India
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Su L, Wu S, Feng J, Wu J. High-efficiency expression of Sulfolobus acidocaldarius maltooligosyl trehalose trehalohydrolase in Escherichia coli through host strain and induction strategy optimization. Bioprocess Biosyst Eng 2018; 42:345-354. [PMID: 30523449 DOI: 10.1007/s00449-018-2039-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 11/07/2018] [Indexed: 11/30/2022]
Abstract
Maltooligosyl trehalose trehalohydrolase (MTHase, EC 3.2.1.141) catalyzes the release of trehalose, a novel food ingredient, by splitting the α-1,4-glucosidic linkage adjacent to the α-1,1-glucosidic linkage of maltooligosyl trehalose. However, the high-yield preparation of recombinant MTHase has not yet been reported. In this study, a codon-optimized synthetic gene encoding Sulfolobus acidocaldarius MTHase was expressed in Escherichia coli. In initial expression experiments conducted using pET-24a (+) and E. coli BL21 (DE3), the MTHase activity was 10.4 U/mL and a large amount of the expression product formed inclusion bodies. The familiar strategies, including addition of additives, co-expression with molecular chaperones, and expression with a fusion partner, failed to enhance soluble MTHase expression. Considering the intermolecular disulfide bond of MTHase, expression was investigated using a system comprising plasmid pET-32a (+) and host E. coli Origami (DE3), which is conducive to cytoplasmic disulfide bond formation. The MTHase activity increased to 55.0 U/mL, a 5.3-fold increase. Optimization of the induction conditions in a 3-L fermentor showed that when the lactose was fed at 0.2 g/L/h beginning at an OD600 of 40 and the induction temperature was maintained at 30 °C, the MTHase activity reached a maximum of 204.6 U/mL. This is the first report describing a systematic effort to obtain high-efficiency MTHase production. The high yield obtained using this process provides the basis for the industrial-scale production of trehalose. This report is also expected to be valuable in the production of other enzymes containing disulfide bonds.
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Affiliation(s)
- Lingqia Su
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.,School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.,International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Shixiong Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.,School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.,International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Jinyun Feng
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.,School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.,International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
| | - Jing Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China. .,School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China. .,International Joint Laboratory on Food Safety, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China.
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Tseng WC, Lin CR, Hung XG, Wei TY, Chen YC, Fang TY. Identification of substrate-binding and selectivity-related residues of maltooligosyltrehalose synthase from the thermophilic archaeon Sulfolobus solfataricus ATCC 35092. Enzyme Microb Technol 2014; 56:53-9. [PMID: 24564903 DOI: 10.1016/j.enzmictec.2014.01.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 01/02/2014] [Accepted: 01/06/2014] [Indexed: 11/27/2022]
Abstract
Maltooligosyltrehalose synthase (MTSase) is a key enzyme in the synthesis of trehalose. Computer simulations using AutoDock and NAMD were employed to assess the substrate-binding and selectivity-related residues of MTSase. We introduced mutations at residues D411, D610, and R614 to determine the substrate-binding residues of Sulfolobus solfataricus ATCC 35092 MTSase, and introduced mutations at residues P402, A406, and V426 to investigate the enzyme's selectivity-related residues. Kinetic studies of D411A, D610A, and R614A MTSases reveal significant reductions in catalytic efficiency and cause increase in the transition-state energy of mutant MTSases, indicating that residues D411, D610, and R614 form hydrogen bonds to the substrate. Compared with wild-type MTSase, the hydrolysis: transglycosylation selectivity ratio was significantly decreased for P402Q and significantly increased for A406S MTSases, while the ratio for V426T MTSase showed little change. The results suggest that P402 and A406 residues are selectivity-related.
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Affiliation(s)
- Wen-Chi Tseng
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
| | - Chia-Ray Lin
- Department of Food Science, Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Xing-Guang Hung
- Department of Food Science, Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Tsen-Yun Wei
- Department of Food Science, Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Yu-Chun Chen
- Department of Food Science, Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Tsuei-Yun Fang
- Department of Food Science, Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan.
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Fu CW, Wang YP, Fang TY, Lin TH. Interaction between trehalose and MTHase from Sulfolobus solfataricus studied by theoretical computation and site-directed mutagenesis. PLoS One 2013; 8:e68565. [PMID: 23894317 PMCID: PMC3716775 DOI: 10.1371/journal.pone.0068565] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Accepted: 05/30/2013] [Indexed: 11/18/2022] Open
Abstract
Maltooligosyltrehalose trehalohydrolase (MTHase) catalyzes the release of trehalose by cleaving the α-1,4-glucosidic linkage next to the α-1,1-linked terminal disaccharide of maltooligosyltrehalose. Computer simulation using the hydrogen bond analysis, free energy decomposition, and computational alanine scanning were employed to investigate the interaction between maltooligosyltrehalose and the enzyme. The same residues that were chosen for theoretical investigation were also studied by site-directed mutagenesis and enzyme kinetic analysis. The importance of residues determined either experimentally or computed theoretically were in good accord with each other. It was found that residues Y155, D156, and W218 of subsites -2 and -3 of the enzyme might play an important role in interacting with the ligand. The theoretically constructed structure of the enzyme-ligand complex was further validated through an ab initio quantum chemical calculation using the Gaussian09 package. The activation energy computed from this latter study was very similar to those reported in literatures for the same type of hydrolysis reactions.
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Affiliation(s)
- Chien-wei Fu
- Institute of Molecular Medicine and Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Yu-Ping Wang
- Department of Food Science and Center of Excellence for Marine Bioenvironment and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Tsuei-Yun Fang
- Department of Food Science and Center of Excellence for Marine Bioenvironment and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
- * E-mail: (THL); (TYF)
| | - Thy-Hou Lin
- Institute of Molecular Medicine and Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan
- * E-mail: (THL); (TYF)
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Okazaki N, Tamada T, Feese MD, Kato M, Miura Y, Komeda T, Kobayashi K, Kondo K, Blaber M, Kuroki R. Substrate recognition mechanism of a glycosyltrehalose trehalohydrolase from Sulfolobus solfataricus KM1. Protein Sci 2012; 21:539-52. [PMID: 22334583 PMCID: PMC3375754 DOI: 10.1002/pro.2039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 01/25/2012] [Accepted: 02/02/2012] [Indexed: 01/07/2023]
Abstract
Glycosyltrehalose trehalohydrolase (GTHase) is an α-amylase that cleaves the α-1,4 bond adjacent to the α-1,1 bond of maltooligosyltrehalose to release trehalose. To investigate the catalytic and substrate recognition mechanisms of GTHase, two residues, Asp252 (nucleophile) and Glu283 (general acid/base), located at the catalytic site of GTHase were mutated (Asp252→Ser (D252S), Glu (D252E) and Glu283→Gln (E283Q)), and the activity and structure of the enzyme were investigated. The E283Q, D252E, and D252S mutants showed only 0.04, 0.03, and 0.6% of enzymatic activity against the wild-type, respectively. The crystal structure of the E283Q mutant GTHase in complex with the substrate, maltotriosyltrehalose (G3-Tre), was determined to 2.6-Å resolution. The structure with G3-Tre indicated that GTHase has at least five substrate binding subsites and that Glu283 is the catalytic acid, and Asp252 is the nucleophile that attacks the C1 carbon in the glycosidic linkage of G3-Tre. The complex structure also revealed a scheme for substrate recognition by GTHase. Substrate recognition involves two unique interactions: stacking of Tyr325 with the terminal glucose ring of the trehalose moiety and perpendicularly placement of Trp215 to the pyranose rings at the subsites -1 and +1 glucose.
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Affiliation(s)
- Nobuo Okazaki
- Molecular Biology Research Division, Quantum Beam Science Directorate, Japan Atomic Energy AgencyTokai, Ibaraki 319-1195, Japan
| | - Taro Tamada
- Molecular Biology Research Division, Quantum Beam Science Directorate, Japan Atomic Energy AgencyTokai, Ibaraki 319-1195, Japan
| | - Michael D Feese
- Cocrystal Discovery Inc.19805 North Creek Parkway, Bothell, Washington 98011
| | - Masaru Kato
- Frontier Technology Research Institute, Kirin Brewery Co., Ltd.1-13-5 Fukuura, Kanazawa-Ku, Yokohama 235-0004, Japan
| | - Yutaka Miura
- Frontier Technology Research Institute, Kirin Brewery Co., Ltd.1-13-5 Fukuura, Kanazawa-Ku, Yokohama 235-0004, Japan
| | - Toshihiro Komeda
- Frontier Technology Research Institute, Kirin Brewery Co., Ltd.1-13-5 Fukuura, Kanazawa-Ku, Yokohama 235-0004, Japan
| | - Kazuo Kobayashi
- Bio Process Research and Development Laboratories, Production Division, Kyowa Hakko Kirin Co., Ltd.100-1 Hagiwara-machi, Takasaki, Gunma, 370-0013 Japan
| | - Keiji Kondo
- Frontier Technology Research Institute, Kirin Brewery Co., Ltd.1-13-5 Fukuura, Kanazawa-Ku, Yokohama 235-0004, Japan
| | - Michael Blaber
- Molecular Biology Research Division, Quantum Beam Science Directorate, Japan Atomic Energy AgencyTokai, Ibaraki 319-1195, Japan,Department of Biomedical Sciences, Florida State University College of MedicineTallahassee, Florida 32306-4300
| | - Ryota Kuroki
- Molecular Biology Research Division, Quantum Beam Science Directorate, Japan Atomic Energy AgencyTokai, Ibaraki 319-1195, Japan,*Correspondence to: Ryota Kuroki, Quantum Beam Science Directorate, Japan Atomic Energy Agency, 2-4, Shirakata-Shirane, Tokai, Ibaraki, 319-1195, Japan. E-mail:
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