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Bučko M, Kaniaková K, Hronská H, Gemeiner P, Rosenberg M. Epoxide Hydrolases: Multipotential Biocatalysts. Int J Mol Sci 2023; 24:ijms24087334. [PMID: 37108499 PMCID: PMC10138715 DOI: 10.3390/ijms24087334] [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: 03/27/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Epoxide hydrolases are attractive and industrially important biocatalysts. They can catalyze the enantioselective hydrolysis of epoxides to the corresponding diols as chiral building blocks for bioactive compounds and drugs. In this review article, we discuss the state of the art and development potential of epoxide hydrolases as biocatalysts based on the most recent approaches and techniques. The review covers new approaches to discover epoxide hydrolases using genome mining and enzyme metagenomics, as well as improving enzyme activity, enantioselectivity, enantioconvergence, and thermostability by directed evolution and a rational design. Further improvements in operational and storage stabilization, reusability, pH stabilization, and thermal stabilization by immobilization techniques are discussed in this study. New possibilities for expanding the synthetic capabilities of epoxide hydrolases by their involvement in non-natural enzyme cascade reactions are described.
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Affiliation(s)
- Marek Bučko
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Katarína Kaniaková
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Helena Hronská
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Peter Gemeiner
- Department of Glycobiotechnology, Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Michal Rosenberg
- Institute of Biotechnology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
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Improved thermostability of D-allulose 3-epimerase from Clostridium bolteae ATCC BAA-613 by proline residue substitution. Protein Expr Purif 2022; 199:106145. [PMID: 35863720 DOI: 10.1016/j.pep.2022.106145] [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: 04/27/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022]
Abstract
d-allulose, a rare sugar that is scarce in nature, exerts several beneficial effects and has commercial potential. d-allulose 3-epimerase (DAEase) plays a vital role in catalyzing the isomerization from d-fructose to d-allulose. However, the industrial application of DAEase for d-allulose production is hindered by its poor long-term thermostability. In the present research, we introduced a proline residue (i) to restrict its spatial conformation and (ii) to reduce the entropy of the unfolded state of DAEase. The t1/2 value of the double-site Clostridium bolteae DAEase mutant Cb-51P/89P was prolonged to 58 min at 55 °C, a 2.32-fold increase compared with wild-type DAEase. The manipulation did not cause obvious changes in the enzymatic properties, including optimum pH, optimal temperature, optimum metal ion, and enzymatic activity. As the accumulation of multiple small effects through proline substitution could dramatically improve the thermostability of the mutant protein, our method to improve the thermostability while roughly retaining the original enzymatic properties is promising.
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Xu Z, He WQ, Liu CS, Kong JQ. Enzymatic synthesis of myricetin 3-O-galactoside through a whole-cell biocatalyst. CHINESE HERBAL MEDICINES 2020; 12:384-389. [PMID: 36120167 PMCID: PMC9476700 DOI: 10.1016/j.chmed.2020.03.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/12/2020] [Accepted: 03/27/2020] [Indexed: 11/17/2022] Open
Abstract
Objective Myricetin 3-O-galactoside is an active compound with pharmaceutical potential. The insufficient supply of this compound becomes a bottleneck in the druggability study of myricetin 3-O-galactoside. Thus, it is necessary to develop a biosynthetic process for myricetin 3-O-galactoside through metabolic engineering. Methods Two genes OcSUS1 and OcUGE1 encoding sucrose synthase and UDP-glucose 4-epimerase were introduced into BL21(DE3) to reconstruct a UDP-D-galactose (UDP-Gal) biosynthetic pathway in Escherichia coli. The resultant chassis strain was able to produce UDP-Gal. Subsequently, a flavonol 3-O-galactosyltransferase DkFGT gene was transformed into the chassis strain producing UDP-Gal. An artificial pathway for myricetin 3-O-galactoside biosynthesis was thus constructed in E. coli. Results The obtained engineered strain was demonstrated to be capable of producing myricetin 3-O-galactoside, reaching 29.7 mg/L. Conclusion Biosynthesis of myricetin 3-O-galactoside through engineered E. coli could be achieved. This result lays the foundation for the large-scale preparation of myricetin 3-O-galactoside.
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Hu X, Fan G, Liao H, Fu Z, Ma C, Ni H, Li X. Optimized soluble expression of a novel endoglucanase from Burkholderia pyrrocinia in Escherichia coli. 3 Biotech 2020; 10:387. [PMID: 32832337 DOI: 10.1007/s13205-020-02327-w] [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: 03/31/2020] [Accepted: 06/29/2020] [Indexed: 12/21/2022] Open
Abstract
Burkholderia pyrrocinia B1213, a novel microbe isolated from a Baijiu-producing environment, displayed strong cellulolytic activity on agar plates with glucan as the carbon source and had an activity of 674.5 U/mL after culturing with barley. Genome annotation of B. pyrrocinia identificated a single endoglucanase (EG)-encoding gene, designated as BpEG01790. The endoglucanase BpEG01790 shows 98.28% sequence similarity with an endo-β-1,4-glucanase (EC 3.2.1.4) from Burkholderia stabilis belonging to glycoside hydrolase family 8 (GH8). The gene BpEG01790 has an open reading frame of 1218 bp encoding a 406 amino acid (AA) residue protein (43.0 kDa) with a 40-AA signal peptide. BpEG01790 was successfully cloned into pET28a( +) with and without the signal peptide; however, attempts to overexpress this protein in Escherichia coli BL21(DE3) cells using this expression system failed. BpEG01790 was also cloned into the pCold TF vector. Active BpEG01790 was successfully overexpressed with or without the signal peptide using the pCold TF vector expression system and E. coli BL21 (DE3) cells. Overexpression of recombinant BpEG01790 without the signal peptide was higher compared with the construct that included the signal peptide. Optimization of culture conditions improved the enzyme activity by 12.5-fold. This is the first report describing the heterologous soluble overexpression of an EG belonging to GH8 from B. pyrrocinia using TF as a molecular chaperone.
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Affiliation(s)
- Xiaoqing Hu
- College of Food and Biological Engineering, Jimei University, Yindou Road, Jimei District, Xiamen, 361021 Fujian China
| | - Guangsen Fan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), No 11 Fucheng Street, Haidian District, Beijing, 100048 China
| | - Hui Liao
- College of Food and Biological Engineering, Jimei University, Yindou Road, Jimei District, Xiamen, 361021 Fujian China
| | - Zhilei Fu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
| | - Chao Ma
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
| | - Hui Ni
- College of Food and Biological Engineering, Jimei University, Yindou Road, Jimei District, Xiamen, 361021 Fujian China
| | - Xiuting Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
- School of Food and Health, Beijing Technology and Business University (BTBU), Beijing, 100048 China
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), No 11 Fucheng Street, Haidian District, Beijing, 100048 China
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Fu Z, Fan G, Zhu Y, Teng C, Li H, Liu Q, Yang R, Li X. Soluble expression of a novel feruloyl esterase from Burkholderia pyrrocinia B1213 in Escherichia coli and optimization of production conditions. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1803129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Zhilei Fu
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
| | - Guangsen Fan
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
| | - Yuting Zhu
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
| | - Chao Teng
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
| | - Hehe Li
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
| | - Qian Liu
- Beijing Key Laboratory of Bioactive Substances and Functional Foods, College of Biochemical Engineering, Beijing Union University, Beijing, PR China
| | - Ran Yang
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
| | - Xiuting Li
- Laboratory of Food Microbiology and Enzyme Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, PR China
- Laboratory of Food Microbiology and Enzyme Engineering, School of Food and Health, Beijing Technology and Business University, Beijing, PR China
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Wang X, Li F, Han M, Jia S, Wang L, Qiao X, Jiang Y, Cui W, Tang L, Li Y, Xu YG. Cloning, Prokaryotic Soluble Expression, and Analysis of Antiviral Activity of Two Novel Feline IFN-ω Proteins. Viruses 2020; 12:v12030335. [PMID: 32204464 PMCID: PMC7150924 DOI: 10.3390/v12030335] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/15/2020] [Accepted: 03/18/2020] [Indexed: 12/14/2022] Open
Abstract
Cats are becoming more popular as household companions and pets, forming close relationships with humans. Although feline viral diseases can pose serious health hazards to pet cats, commercialized preventative vaccines are lacking. Interferons (IFNs), especially type I IFNs (IFN-α, IFN-β, and interferon omega (IFN-ω)), have been explored as effective therapeutic drugs against viral diseases in cats. Nevertheless, there is limited knowledge regarding feline IFN-ω (feIFN-ω), compared to IFN-α and IFN-β. In this study, we cloned the genes encoding feIFN-ωa and feIFN-ωb from cat spleen lymphocytes. Homology and phylogenetic tree analysis revealed that these two genes belonged to new subtypes of feIFN-ω. The recombinant feIFN-ωa and feIFN-ωb proteins were expressed in their soluble forms in Escherichia coli, followed by purification. Both proteins exhibited effective anti-vesicular stomatitis virus (VSV) activity in Vero, F81 (feline kidney cell), Madin-Darby bovine kidney (MDBK), Madin-Darby canine kidney (MDCK), and porcine kidney (PK-15) cells, showing broader cross-species antiviral activity than the INTERCAT IFN antiviral drug. Furthermore, the recombinant feIFN-ωa and feIFN-ωb proteins demonstrated antiviral activity against VSV, feline coronavirus (FCoV), canine parvovirus (CPV), bovine viral diarrhea virus (BVDV), and porcine epidemic diarrhea virus (PEDV), indicating better broad-spectrum antiviral activity than the INTERCAT IFN. The two novel feIFN-ω proteins (feIFN-ωa and feIFN-ωb) described in this study show promising potential to serve as effective therapeutic agents for treating viral infections in pet cats.
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Affiliation(s)
- Xiaona Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Fengsai Li
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Meijing Han
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Shuo Jia
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Li Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Xinyuan Qiao
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Yanping Jiang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Wen Cui
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
| | - Lijie Tang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
- Northeastern Science Inspection Station, China Ministry of Agriculture Key Laboratory of Animal Pathogen Biology, Harbin 150030, China
| | - Yijing Li
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
- Northeastern Science Inspection Station, China Ministry of Agriculture Key Laboratory of Animal Pathogen Biology, Harbin 150030, China
| | - Yi-Gang Xu
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China; (X.W.); (F.L.); (M.H.); (S.J.); (L.W.); (X.Q.); (Y.J.); (W.C.); (L.T.); (Y.L.)
- Northeastern Science Inspection Station, China Ministry of Agriculture Key Laboratory of Animal Pathogen Biology, Harbin 150030, China
- Correspondence: ; Tel.: +86-451-55190824
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Hu B, Hu D, Zhang D, Wen Z, Zang J, Wu M. Manipulating the regioselectivity of a Solanum lycopersicum epoxide hydrolase for the enantioconvergent synthesis of enantiopure alkane- and alkene-1,2-diols. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00990c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This work engineered a superior double-site mutant SlEH1W106T/F189L used for the enantioconvergent biosynthesis of (R)-1b–6b with high eep values.
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Affiliation(s)
- Bochun Hu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Die Hu
- Wuxi School of Medicine
- Jiangnan University
- Wuxi 214122
- China
| | - Dong Zhang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Zheng Wen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi 214122
| | - Jia Zang
- The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University
- Wuxi 214002
- China
| | - Minchen Wu
- Wuxi School of Medicine
- Jiangnan University
- Wuxi 214122
- China
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Wang M, Zheng F, Wang T, Lyu YM, Alteen MG, Cai ZP, Cui ZL, Liu L, Voglmeir J. Characterization of Stackebrandtia nassauensis GH 20 Beta-Hexosaminidase, a Versatile Biocatalyst for Chitobiose Degradation. Int J Mol Sci 2019; 20:ijms20051243. [PMID: 30871033 PMCID: PMC6429369 DOI: 10.3390/ijms20051243] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/21/2019] [Accepted: 03/04/2019] [Indexed: 12/31/2022] Open
Abstract
An unstudied β-N-acetylhexosaminidase (SnHex) from the soil bacterium Stackebrandtia nassauensis was successfully cloned and subsequently expressed as a soluble protein in Escherichia coli. Activity tests and the biochemical characterization of the purified protein revealed an optimum pH of 6.0 and a robust thermal stability at 50 °C within 24 h. The addition of urea (1 M) or sodium dodecyl sulfate (1% w/v) reduced the activity of the enzyme by 44% and 58%, respectively, whereas the addition of divalent metal ions had no effect on the enzymatic activity. PUGNAc (O-(2-acetamido-2-deoxy-D-glucopyranosylidene)amino-N-phenylcarbamate) strongly inhibited the enzyme in sub-micromolar concentrations. The β-N-acetylhexosaminidase was able to hydrolyze β1,2-linked, β1,3-linked, β1,4-linked, and β1,6-linked GlcNAc residues from the non-reducing end of various tested glycan standards, including bisecting GlcNAc from one of the tested hybrid-type N-glycan substrates. A mutational study revealed that the amino acids D306 and E307 bear the catalytically relevant side acid/base side chains. When coupled with a chitinase, the β-N-acetylhexosaminidase was able to generate GlcNAc directly from colloidal chitin, which showed the potential of this enzyme for biotechnological applications.
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Affiliation(s)
- Meng Wang
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Feng Zheng
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Ting Wang
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yong-Mei Lyu
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Matthew G Alteen
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
| | - Zhi-Peng Cai
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Zhong-Li Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
| | - Li Liu
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
| | - Josef Voglmeir
- Glycomics and Glycan Bioengineering Research Center (GGBRC), College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China.
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Affiliation(s)
- Paul D. Riggs
- New England Biolabs, Inc., Research; Ipswich Massachusetts
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Bioresolution of racemic phenyl glycidyl ether by a putative recombinant epoxide hydrolase from Streptomyces griseus NBRC 13350. World J Microbiol Biotechnol 2017; 33:82. [PMID: 28378221 DOI: 10.1007/s11274-017-2248-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 03/16/2017] [Indexed: 01/29/2023]
Abstract
In order to produce enantiomerically pure epoxides for the synthesis of value-added chemicals, a novel putative epoxide hydrolase (EH) sgeh was cloned and overexpressed in pET28a/Escherichia coli BL21(DE3). The 1047 bp sgeh gene was mined from Streptomyces griseus NBRC 13350 genome sequence. The recombinant hexahistidyl-tagged SGEH was purified (16.6-fold) by immobilized metal-affinity chromatography, with 90% yield as a homodimer of 100 kDa. The recombinant E. coli whole cells overexpressing SGEH could kinetically resolve racemic phenyl glycidyl ether (PGE) into (R)-PGE with 98% ee, 40% yield, and enantiomeric ratio (E) of 20. This was achieved under the optimized reaction conditions i.e. cell/substrate ratio of 20:1 (w/w) at pH 7.5 and 20 °C in 10% (v/v) dimethylformamide (DMF) in a 10 h reaction. 99% enantiopure (R)-PGE was obtained when the reaction time was prolonged to 12 h with a yield of 34%. In conclusion, an economically viable and environment friendly green process for the production of enantiopure (R)-PGE was developed by using wet cells of E. coli expressing recombinant SGEH.
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12
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Saini P, Sareen D. An Overview on the Enhancement of Enantioselectivity and Stability of Microbial Epoxide Hydrolases. Mol Biotechnol 2017; 59:98-116. [PMID: 28271340 DOI: 10.1007/s12033-017-9996-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Epoxide hydrolases (EHs; 3.3.2.x) catalyze the enantioselective ring opening of racemic epoxides to the corresponding enantiopure vicinal diols and remaining equivalent unreacted epoxides. These epoxides and diols are used for the synthesis of chiral drug intermediates. With an upsurge in the methods for identification of novel microbial EHs, a lot of EHs have been discovered and utilized for kinetic resolution of racemic epoxides. However, there is still a constraint on the account of limited EHs being successfully applied on the preparative scale for industrial biotransformations. This limitation has to be overcome before application of identified functional EHs on large scale. Many strategies such as optimizing reaction media, immobilizing EHs and laboratory-scale directed evolution of EHs have been adopted for enhancing the industrial potential of EHs. In this review, these approaches have been highlighted which can serve as a pathway for the enrichment of already identified EHs for their application on an industrial scale in future studies.
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Affiliation(s)
- Priya Saini
- Department of Biochemistry, Panjab University, Sector 25, BMS Block II, Chandigarh, 160014, India
| | - Dipti Sareen
- Department of Biochemistry, Panjab University, Sector 25, BMS Block II, Chandigarh, 160014, India.
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Chen T, Xu W. A purification method for tag-free human cystatin C recombinant protein expressed in Escherichia coli. Prep Biochem Biotechnol 2017; 47:123-128. [PMID: 27143404 DOI: 10.1080/10826068.2016.1181087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
To obtain recombinant cystatin C (CysC) protein, which can be used in immunological diagnostic kits, we focused on the preparation of tag-free CysC. The 6 × His-TF-CysC fusion protein was found to overexpress in soluble form in cells of BL21-Gold (DE3)/pCold TF-CysC, which had been induced with isopropyl-D-1-thiogalactopyranoside. Subsequently, we established a protein purification method for tag-free CysC using immobilized metal-affinity chromatography and size-exclusion chromatography. In this method, glutathione-S-transferase-human rhinovirus 3C proteases were used to remove the protein tags. High homogeneity of the purified CysC was determined by SDS-PAGE, while the purity of the tag-free CysC was ascertained to be above 95%. With a yield of 25 mg/L from bacterial culture, the biological activity of the tag-free CysC was evaluated as inhibitors like natural CysC. The performance of this purification method was successfully evaluated in the preparation of other low molecular weight heterologous proteins in Escherichia coli.
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Affiliation(s)
- Te Chen
- a Department of Laboratory Medicine , The First Affiliated Hospital of Chongqing Medical University , Chongqing , China
| | - Wenchun Xu
- b Laboratory of Medical Diagnostics (Ministry of Education of China) , Department of Key Laboratory Medicine, Chongqing Medical University , Chongqing , China
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14
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Nguyen TH, Nguyen VD. Characterization and Applications of Marine Microbial Enzymes in Biotechnology and Probiotics for Animal Health. ADVANCES IN FOOD AND NUTRITION RESEARCH 2017; 80:37-74. [PMID: 28215328 DOI: 10.1016/bs.afnr.2016.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Marine microorganisms have been recognized as potential sources of novel enzymes because they are relatively more stable than the corresponding enzymes derived from plants and animals. Enzymes from marine microorganisms also differ from homologous enzymes in terrestrial microorganisms based on salinity, pressure, temperature, and lighting conditions. Marine microbial enzymes can be used in diverse industrial applications. This chapter will focus on the biotechnological applications of marine enzymes and also their use as a tool of marine probiotics to improve host digestion (food digestion, food absorption, and mucus utilization) and cleave molecular signals involved in quorum sensing in pathogens to control disease in aquaculture.
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Affiliation(s)
- T H Nguyen
- Faculty of Food Technology, Nha Trang University, Nha Trang, Vietnam.
| | - V D Nguyen
- Institute of Biotechnology and Environment, Nha Trang University, Nha Trang, Vietnam.
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15
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Tang X, Chen J, Wang Y, Wang X. Gene cloning, expression and polyclonal antibody preparation of Rab3A for protein interaction analysis. SPRINGERPLUS 2016; 5:1705. [PMID: 27795879 PMCID: PMC5052235 DOI: 10.1186/s40064-016-3330-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 09/19/2016] [Indexed: 11/29/2022]
Abstract
Background Rab3A is a GTP-binding protein and plays critical roles in the regulation of synaptic vesicle exocytosis. Up to date, how Rab3A participates in such a regulatory process is not completely clear. Results In this report the Rab3A gene from Rattus norvegicus was cloned and heterologously expressed in E. coli using pCold-TF expression vector with folding capacity. Due to the presence of His-tag sequence on the N-terminal side, Rab3A fusion protein was purified to greater than 95 % purity with a single Ni-affinity purification step. After the Rab3A fusion protein was used to immunize mice, an anti-serum against Rab3A with a titer of about 6000 was generated. Western blot analysis indicated that the prepared polyclonal antibody could recognize both Rab3A fusion protein and native Rab3A protein. To remove the tag sequence, thrombin was used to cleave the Rab3A fusion protein, followed by SDS-PAGE to separate the cleavage products. Using the gel protein recovery strategy with a Micro Protein PAGE Recovery Kit, the de-tagged Rab3A protein of electrophoretic purity was prepared. Conclusions The present work not only prepared the ground for the study on Rab3A-mediated protein interactions, but also provided systematic experimental methods referable for the similar studies.
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Affiliation(s)
- Xia Tang
- Key Laboratory of Protein Chemistry and Developmental Biology of Ministry of Education, College of Life Sciences, Hunan Normal University, Changsha, 410081 Hunan China
| | - Jia Chen
- Key Laboratory of Protein Chemistry and Developmental Biology of Ministry of Education, College of Life Sciences, Hunan Normal University, Changsha, 410081 Hunan China
| | - Ying Wang
- Key Laboratory of Protein Chemistry and Developmental Biology of Ministry of Education, College of Life Sciences, Hunan Normal University, Changsha, 410081 Hunan China
| | - Xianchun Wang
- Key Laboratory of Protein Chemistry and Developmental Biology of Ministry of Education, College of Life Sciences, Hunan Normal University, Changsha, 410081 Hunan China
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16
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Zhai Q, Huang B, Dong H, Zhao Q, Zhu S, Liang S, Li S, Yang S, Han H. Molecular Characterization and Immune Protection of a New Conserved Hypothetical Protein of Eimeria tenella. PLoS One 2016; 11:e0157678. [PMID: 27309852 PMCID: PMC4910997 DOI: 10.1371/journal.pone.0157678] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 06/02/2016] [Indexed: 12/28/2022] Open
Abstract
The genome sequences of Eimeria tenella have been sequenced, but >70% of these genes are currently categorized as having an unknown function or annotated as conserved hypothetical proteins, and few of them have been studied. In the present study, a conserved hypothetical protein gene of E. tenella, designated EtCHP559, was cloned using rapid amplification of cDNA 5'-ends (5'RACE) based on the expressed sequence tag (EST). The 1746-bp full-length cDNA of EtCHP559 contained a 1224-bp open reading frame (ORF) that encoded a 407-amino acid polypeptide with the predicted molecular weight of 46.04 kDa. Real-time quantitative PCR analysis revealed that EtCHP559 was expressed at higher levels in sporozoites than in the other developmental stages (unsporulated oocysts, sporulated oocysts and second generation merozoites). The ORF was inserted into pCold-TF to produce recombinant EtCHP559. Using western blotting, the recombinant protein was successfully recognized by rabbit serum against E. tenella sporozoites. Immunolocalization by using EtCHP559 antibody showed that EtCHP559 was mainly distributed on the parasite surface in free sporozoites and became concentrated in the anterior region after sporozoites were incubated in complete medium. The EtCHP559 became uniformly dispersed in immature and mature schizonts. Inhibition of EtCHP559 function using anti-rEtCHP559 polyclonal antibody reduced the ability of E. tenella sporozoites to invade host cells by >70%. Animal challenge experiments demonstrated that the recombinant EtCHP559 significantly increased the average body weight gain, reduced the oocyst outputs, alleviated cecal lesions of the infected chickens, and resulted in anticoccidial index >160 against E. tenella. These results suggest that EtCHP559 plays an important role in sporozoite invasion and could be an effective candidate for the development of a new vaccine against E. tenella.
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Affiliation(s)
- Qi Zhai
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Bing Huang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China
| | - Hui Dong
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Qiping Zhao
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Shunhai Zhu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Siting Liang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Sha Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Sihan Yang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
| | - Hongyu Han
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Key Laboratory of Animal Parasitology of Ministry of Agriculture, Minhang, Shanghai, PR China
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