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Aqeel A, Ahmed Z, Akram F, Abbas Q, Ikram-Ul-Haq. Cloning, expression and purification of cellobiohydrolase gene from Caldicellulosiruptor bescii for efficient saccharification of plant biomass. Int J Biol Macromol 2024; 271:132525. [PMID: 38797293 DOI: 10.1016/j.ijbiomac.2024.132525] [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: 02/19/2024] [Revised: 05/04/2024] [Accepted: 05/18/2024] [Indexed: 05/29/2024]
Abstract
Anthropogenic activities have led to a drastic shift from natural fuels to alternative renewable energy reserves that demand heat-stable cellulases. Cellobiohydrolase is an indispensable member of cellulases that play a critical role in the degradation of cellulosic biomass. This article details the process of cloning the cellobiohydrolase gene from the thermophilic bacterium Caldicellulosiruptor bescii and expressing it in Escherichia coli (BL21) CondonPlus DE3-(RIPL) using the pET-21a(+) expression vector. Multi-alignments and structural modeling studies reveal that recombinant CbCBH contained a conserved cellulose binding domain III. The enzyme's catalytic site included Asp-372 and Glu-620, which are either involved in substrate or metal binding. The purified CbCBH, with a molecular weight of 91.8 kDa, displayed peak activity against pNPC (167.93 U/mg) at 65°C and pH 6.0. Moreover, it demonstrated remarkable stability across a broad temperature range (60-80°C) for 8 h. Additionally, the Plackett-Burman experimental model was employed to assess the saccharification of pretreated sugarcane bagasse with CbCBH, aiming to evaluate the cultivation conditions. The optimized parameters, including a pH of 6.0, a temperature of 55°C, a 24-hour incubation period, a substrate concentration of 1.5% (w/v), and enzyme activity of 120 U, resulted in an observed saccharification efficiency of 28.45%. This discovery indicates that the recombinant CbCBH holds promising potential for biofuel sector.
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Affiliation(s)
- Amna Aqeel
- Dr. Ikram-ul-Haq Institute of Industrial Biotechnology, Government College University Lahore, 54000, Pakistan.
| | - Zeeshan Ahmed
- Dr. Ikram-ul-Haq Institute of Industrial Biotechnology, Government College University Lahore, 54000, Pakistan
| | - Fatima Akram
- Dr. Ikram-ul-Haq Institute of Industrial Biotechnology, Government College University Lahore, 54000, Pakistan
| | - Qamar Abbas
- School of Biological Sciences, University of Punjab, Lahore 54000, Pakistan
| | - Ikram-Ul-Haq
- Dr. Ikram-ul-Haq Institute of Industrial Biotechnology, Government College University Lahore, 54000, Pakistan
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2
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Handayani CV, Laksmi FA, Andriani A, Nuryana I, Mubarik NR, Agustriana E, Dewi KS, Purnawan A. Expression of soluble moloney murine leukemia virus-reverse transcriptase in Escherichia coli BL21 star (DE3) using autoinduction system. Mol Biol Rep 2024; 51:628. [PMID: 38717629 DOI: 10.1007/s11033-024-09583-6] [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: 02/05/2024] [Accepted: 04/23/2024] [Indexed: 06/07/2024]
Abstract
Autoinduction systems in Escherichia coli can control the production of proteins without the addition of a particular inducer. In the present study, we optimized the heterologous expression of Moloney Murine Leukemia Virus derived Reverse Transcriptase (MMLV-RT) in E. coli. Among 4 autoinduction media, media Imperial College resulted the highest MMLV-RT overexpression in E. coli BL21 Star (DE3) with incubation time 96 h. The enzyme was produced most optimum in soluble fraction of lysate cells. The MMLV-RT was then purified using the Immobilized Metal Affinity Chromatography method and had specific activity of 629.4 U/mg. The system resulted lower specific activity and longer incubation of the enzyme than a classical Isopropyl ß-D-1-thiogalactopyranoside (IPTG)-induction system. However, the autoinduction resulted higher yield of the enzyme than the conventional induction (27.8%). Techno Economic Analysis revealed that this method could produce MMLV-RT using autoinduction at half the cost of MMLV-RT production by IPTG-induction. Bioprocessing techniques are necessary to conduct to obtain higher quality of MMLV-RT under autoinduction system.
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Affiliation(s)
- Christina Vivid Handayani
- Research Center for Applied Microbiology, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia
- Biotechnology Program, Graduate School, IPB University, Bogor, Indonesia
| | - Fina Amreta Laksmi
- Research Center for Applied Microbiology, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia.
| | - Ade Andriani
- Research Center for Applied Microbiology, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia.
| | - Isa Nuryana
- Research Center for Applied Microbiology, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia
| | - Nisa Rachmania Mubarik
- Department of Biology, Faculty of Mathematic and Natural Science, IPB University, Bogor, Indonesia
| | - Eva Agustriana
- Research Center for Applied Microbiology, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia
| | - Kartika Sari Dewi
- Research Center for Genetic Engineering, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia
| | - Awan Purnawan
- Research Center for Applied Microbiology, National Agency for Research and Innovation, Jl. Raya Bogor, Km. 46, Cibinong, Bogor, 16911, Indonesia
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Luo Q, Liu C, Zhang A, Zhang D. Research progress in photodynamic therapy for Helicobacter pylori infection. Helicobacter 2024; 29:e13068. [PMID: 38497573 DOI: 10.1111/hel.13068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 03/03/2024] [Accepted: 03/08/2024] [Indexed: 03/19/2024]
Abstract
Helicobacter pylori (H. pylori) is a pathogenic microorganism that colonizes the human gastric mucosa and can lead to various gastric disorders, including gastritis, gastric ulcers, and gastric cancer. However, the increasing prevalence of antibiotic resistance in H. pylori has prompted the search for alternative treatment options. Photodynamic therapy has emerged as a potential alternative therapy, thus offering the advantage of avoiding some of the side effects associated with antibiotics and effectively targeting drug-resistant strains. In the postantibiotic era, photodynamic therapy (PDT) has shown promise as a novel treatment for H. pylori infection. This review focused on elucidating the mechanism of photodynamic therapy in the treatment of H. pylori. Additionally, we present an overview of the current research on photodynamic therapy by examining both standalone photodynamic therapy and combination therapies for H. pylori infection treatment. Furthermore, the safety profile of photodynamic therapy was also evaluated. Finally, we discuss the challenges and prospects associated with this innovative technology, with an aim to provide new insights and methodologies for the treatment of H. pylori infection.
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Affiliation(s)
- Qian Luo
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, Lanzhou University Second Hospital, Lanzhou, China
| | - Chunyan Liu
- Institute of Sensor Technology, Gansu Academy of Sciences, Key Laboratory of Sensor and Sensing Technology of Gansu, Lanzhou, China
| | - Aiping Zhang
- The Second People's Hospital of Lanzhou, Lanzhou, China
| | - Dekui Zhang
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, Lanzhou University Second Hospital, Lanzhou, China
- Key Laboratory of Digestive Diseases, Lanzhou University Second Hospital, Lanzhou, China
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Akthar M, Shimokawa T, Wu Y, Arita T, Mizuta K, Isono Y, Maeda M, Ikeno S. Intermittent induction of LEA peptide by lactose enhances the expression of insecticidal proteins in Bacillus thuringiensis. FEBS Open Bio 2022; 12:1534-1541. [PMID: 35638574 PMCID: PMC9340782 DOI: 10.1002/2211-5463.13448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 04/08/2022] [Accepted: 05/30/2022] [Indexed: 12/04/2022] Open
Abstract
Cry toxins from Bacillus thuringiensis (Bt) have been extensively applied in agriculture to substitute the use of chemical insecticides. We have previously reported the use of a coexpression system in which late embryogenesis abundant (LEA) peptides under the control of the lac promoter increase the expression of insecticidal proteins in Bt. The use of lactose to induce the expression of LEA peptides may be a desirable alternative to isopropyl β‐D‐thiogalactopyranoside, the most frequently used inducer for recombinant protein expression. In this study we investigated the use of lactose as an inducer for optimal protein expression. We observed enhanced insecticidal Cry protein expression by applying a simple technique based on intermittent induction, and then optimized concentration and the point of induction time from the 11th h to the 15th h. Our data suggest that intermittent induction of lactose might be a new technique for the enhancement of bacterial protein expression.
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Affiliation(s)
- Mahmuda Akthar
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
| | - Tomoko Shimokawa
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan.,Kyushu Medical Co, LTD, Bioindustry Division, Hyakunen-kouen 1-1 Kurume, Fukuoka, Japan
| | - Yinghan Wu
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
| | - Taichi Arita
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
| | - Kazuhiro Mizuta
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
| | - Yuria Isono
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
| | - Minoru Maeda
- Kyushu Medical Co, LTD, Bioindustry Division, Hyakunen-kouen 1-1 Kurume, Fukuoka, Japan
| | - Shinya Ikeno
- Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
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Okasha H, Nasr SM, Samir S. Recombinant Expression of Cec-B Peptide in Escherichia coli with a Significant Anticancer Effect on Hepatocellular Carcinoma. Curr Pharm Biotechnol 2021; 22:1235-1245. [PMID: 33397234 DOI: 10.2174/1389201022666210104121709] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/22/2020] [Accepted: 11/11/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Cecropin-B (Cec-B) is an Antimicrobial Peptide (AMP) found in insects. OBJECTIVES Recombinant production of Cec-B peptide in Escherichia coli (Rosetta™ DE3), and studying its anticancer effect on Hepatocellular Carcinoma Cell line (HCC). METHODS The Cec-B gene of Drosophila melanogaster was synthesized by PCR assembly using the Simplified Gene Synthesis (SGS) method. To express the recombinant peptide in E. coli (Rosetta™ DE3); the synthesized gene was cloned into pET-15b expression vector. The recombinant peptide was expressed as insoluble aggregates called Inclusion Bodies (IBs) using 2mM lactose inducer. IBs were solubilized in a denatured form using 8 M urea followed by in-vitro protein refolding using rapid dilution method. The refolded Cec-B was purified using cation-exchange SP-FF column. Cytotoxicity of recombinant Cec-B (rCec-B) was reported on normal human lung cell line (WI-38), and Hepatocellular carcinoma cell line (HepG2). RESULTS The Cec-B gene was expressed and purified at concentration 1.212±0.1 mg/ml which represents 48.49±4% of the total proteins injected to the column (2.5±0.2 mg/ml). The safe dose of purified rCec-B on normal WI-38 cells was calculated to be 1.57 mg/ml. The half-maximal Inhibitory Concentration (IC50) of rCec-B on HepG2 cell line was calculated to be 25 μg/ml. Scanning Electron Microscope (SEM) showed that untreated and treated HepG2 cells had cell diameters from 11-12.92 μm and 14.18-21.58 μm, respectively. CONCLUSION The results of this study revealed a successful expression of the rCec-B peptide using a pET-based expression system with a simple purification step. The purified peptide could be considered as a hopeful anticancer drug against HCC.
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Affiliation(s)
- Hend Okasha
- Biochemistry and Molecular Biology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Sami Mohamed Nasr
- Biochemistry and Molecular Biology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Safia Samir
- Biochemistry and Molecular Biology Department, Theodor Bilharz Research Institute, Giza, Egypt
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Kopp J, Kittler S, Slouka C, Herwig C, Spadiut O, Wurm DJ. Repetitive Fed-Batch: A Promising Process Mode for Biomanufacturing With E. coli. Front Bioeng Biotechnol 2020; 8:573607. [PMID: 33240864 PMCID: PMC7683717 DOI: 10.3389/fbioe.2020.573607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 10/21/2020] [Indexed: 12/13/2022] Open
Abstract
Recombinant protein production with Escherichia coli is usually carried out in fed-batch mode in industry. As set-up and cleaning of equipment are time- and cost-intensive, it would be economically and environmentally favorable to reduce the number of these procedures. Switching from fed-batch to continuous biomanufacturing with microbials is not yet applied as these cultivations still suffer from time-dependent variations in productivity. Repetitive fed-batch process technology facilitates critical equipment usage, reduces the environmental fingerprint and potentially increases the overall space-time yield. Surprisingly, studies on repetitive fed-batch processes for recombinant protein production can be found for yeasts only. Knowledge on repetitive fed-batch cultivation technology for recombinant protein production in E. coli is not available until now. In this study, a mixed feed approach, enabling repetitive fed-batch technology for recombinant protein production in E. coli, was developed. Effects of the cultivation mode on the space-time yield for a single-cycle fed-batch, a two-cycle repetitive fed-batch, a three-cycle repetitive fed batch and a chemostat cultivation were investigated. For that purpose, we used two different E. coli strains, expressing a model protein in the cytoplasm or in the periplasm, respectively. Our results demonstrate that a repetitive fed-batch for E. coli leads to a higher space-time yield compared to a single-cycle fed-batch and can potentially outperform continuous biomanufacturing. For the first time, we were able to show that repetitive fed-batch technology is highly suitable for recombinant protein production in E. coli using our mixed feeding approach, as it potentially (i) improves product throughput by using critical equipment to its full capacity and (ii) allows implementation of a more economic process by reducing cleaning and set-up times.
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Affiliation(s)
- Julian Kopp
- Research Area Biochemical Engineering, Institute of Chemical Engineering, TU Wien, Vienna, Austria
| | - Stefan Kittler
- Research Area Biochemical Engineering, Institute of Chemical Engineering, TU Wien, Vienna, Austria
| | - Christoph Slouka
- Research Area Biochemical Engineering, Institute of Chemical Engineering, TU Wien, Vienna, Austria
| | - Christoph Herwig
- Research Area Biochemical Engineering, Institute of Chemical Engineering, TU Wien, Vienna, Austria
| | - Oliver Spadiut
- Research Area Biochemical Engineering, Institute of Chemical Engineering, TU Wien, Vienna, Austria
| | - David J Wurm
- Research Area Biochemical Engineering, Institute of Chemical Engineering, TU Wien, Vienna, Austria
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Akram F, Haq IU. Overexpression and characterization of TnCel12B, a hyperthermophilic GH12 endo-1,4-β-glucanase cloned from Thermotoga naphthophila RKU-10 T. Anal Biochem 2020; 599:113741. [PMID: 32339490 DOI: 10.1016/j.ab.2020.113741] [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] [Received: 01/17/2020] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 11/26/2022]
Abstract
A putative cellulolytic gene (825 bp) from Thermotoga naphthophila RKU-10T was overexpressed as an active soluble endo-1,4-β-glucanase (TnCel12B), belongs to glycoside hydrolase family 12 (GH12), in a mesophilic expression host. Heterologous expression and engineered bacterial cell mass was improved through specific strategies (induction and cultivation). Hence, intracellular activity of TnCel12B was enhanced in ZYBM9 modified medium (pH 7.0) by 8.38 and 6.25 fold with lactose (200 mM) and IPTG (0.5 mM) induction, respectively; and 6.95 fold was increased in ZYP-5052 auto-inducing medium after 8 h incubation at 26 °C (200 rev min-1). Purified TnCel12B with a molecular weight of ~32 kDa, was optimally active at 90 °C and pH 6.0; and exhibited prodigious stability over a wide range of temperature (50-85 °C) and pH (5.0-9.0) for 8 h TnCel12B displayed great resistance towards different chemical modulators, though activity was improved by Mg2+, Zn2+, Pb2+ and Ca2+. Purified TnCel12B had affinity with various substrates but peak activity was observed toward barley β-glucan (1664 U mg-1) and carboxymethyl cellulose (736 U mg-1). The values of Km, Vmax, kcat, and kcatKm-1 were found to be 4.63 mg mL-1, 916 μmol mg-1min-1, 1326.7 s-1 and 286.54 mL mg-1 s-1, respectively using CMC substrate. All noteworthy features of TnCel12B make it an appropriate industrial candidate for bioethanol production and various other potential applications.
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Affiliation(s)
- Fatima Akram
- Institute of Industrial Biotechnology, GC University, Lahore, 54000, Pakistan.
| | - Ikram Ul Haq
- Institute of Industrial Biotechnology, GC University, Lahore, 54000, Pakistan.
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Zafar A, Aftab MN, Iqbal I, Din ZU, Saleem MA. Pilot-scale production of a highly thermostable α-amylase enzyme from Thermotoga petrophila cloned into E. coli and its application as a desizer in textile industry. RSC Adv 2019; 9:984-992. [PMID: 35517638 PMCID: PMC9059537 DOI: 10.1039/c8ra06554c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 12/12/2018] [Indexed: 11/29/2022] Open
Abstract
In this study, the industrial applications of a highly thermostable α-amylase as a desizer in the textile industry was evaluated. The cloned gene was expressed in different media (ZBM, LB, ZYBM9, and ZB) with IPTG (isopropyl β-d-1-thiogalactopyranoside) used as an inducer. Lactose was also used as an alternate inducer for the T7 promoter system in E. coli. For the large-scale production of the enzyme, different parameters were optimized. The maximum enzyme production was achieved when the volume of medium was 70% of the total volume of fermenter with a 2.0 vvm air supply and 20% dissolved oxygen at a 200 rpm agitation rate. Under all the optimized conditions, the maximum enzyme production was 22.08 U ml−1 min−1 with lactose (200 mM) as an inducer in ZBM medium. The desizing potential of the purified α-amylase enzyme was calculated with different enzyme concentrations (50–300 U ml−1) at different temperatures (50–100 °C), and pHs (4–9) with varying time intervals (30–120 min). The highest desizing activity was found when 150 U ml−1 enzyme units were utilized at 85 °C and at 6.5 pH for 1 h. Thermostable recombinant α-amylase was produced in a large scale for the desizing of cotton cloth in the textile industry.![]()
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Affiliation(s)
- Asma Zafar
- Faculty of Life Sciences
- University of Central Punjab
- Lahore
- Pakistan
| | | | - Irfana Iqbal
- Department of Zoology
- Lahore College for Women University
- Lahore
- Pakistan
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Haq IU, Akram F. Enhanced production, overexpression and characterization of a hyperthermophilic multimodular GH family 2 β‑glucuronidase (TpGUS) cloned from Thermotoga petrophila RKU-1 T in a mesophilic host. Int J Biol Macromol 2018; 123:1132-1142. [PMID: 30465846 DOI: 10.1016/j.ijbiomac.2018.11.189] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 11/02/2018] [Accepted: 11/19/2018] [Indexed: 12/24/2022]
Abstract
A multimodular hyperthermophilic β‑glucuronidase (TpGUS) from Thermotoga petrophila RKU-1T, belongs to glycoside hydrolase family 2 (GH2), was cloned and overexpressed in Escherichia coli BL21 CodonPlus (DE3)-RIPL. Expression and production of extracellular TpGUS was enhanced through various specific cultivation and induction strategies. Extracellular TpGUS activity was improved by 3.44 and 7 fold in 4 × ZB medium induced with 0.5 mM IPTG and 100 mM lactose, respectively. The enzyme was purified to homogeneity with a single band of 65.6 kDa on SDS-PAGE, using two subsequent steps of anion exchange and hydrophobic interaction chromatography after heat precipitation (70 °C, 1 h). Optimal activity of TpGUS was observed at 95 °C and pH 6.0; and it displayed prodigious thermal stability over a temperature range of 50-85 °C for 12 h at pH 6.0-7.5. Km, Vmax, VmaxKm-1, kcat, and kcatKm-1 were calculated to be 0.7 mM, 227 mmol mg-1 min-1, 324.3 min-1, 164,492.7 s-1 and 234,989.6 mM-1 s-1, respectively using pNPGU as a substrate. Recombinant TpGUS exhibited favorable properties which make this a promising candidate for various biotechnological and pharmacological applications.
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Affiliation(s)
- Ikram Ul Haq
- Institute of Industrial Biotechnology, GC University, Lahore 54000, Pakistan.
| | - Fatima Akram
- Institute of Industrial Biotechnology, GC University, Lahore 54000, Pakistan
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Eguia FAP, Ramos HR, Kraschowetz S, Omote D, Ramos CRR, Ho PL, Carvalho E, Gonçalves VM. A new vector for heterologous gene expression in Escherichia coli with increased stability in the absence of antibiotic. Plasmid 2018; 98:22-30. [PMID: 30193910 DOI: 10.1016/j.plasmid.2018.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 08/28/2018] [Accepted: 08/30/2018] [Indexed: 01/12/2023]
Abstract
Expression vectors for industrial production should be stable and allow tight control of protein synthesis. This is necessary to ensure plasmid transmission to daughter cells in order to achieve a stable population capable of synthesizing high amounts of the target protein. A high-copy-number plasmid, pAE, was previously used for laboratory-scale production of recombinant human granulocyte colony-stimulating factor (rhG-CSF) and the Schistosoma mansoni fatty acid binding protein (rSm14), but it was unstable for large-scale production. Therefore, here we evaluated a new expression vector derived from pAE, pAR-KanI, which combines two plasmid replication strategies: a high-copy plasmid pUC origin of replication as pAE, and a par locus sequence derived from pSC101, which is typical of low copy plasmids, for rhG-CSF and rSm14 production in Escherichia coli. Clones bearing these constructs were cultivated in two complex media (2YT and auto-induction) and both yielded higher-than-95% resistant colonies, before and after induction, either with or without antibiotics. In 2YT medium, we obtained 244 μg/mL of rSm14, 181 μg/mL and 392 μg/mL for rhG-CSF, with and without glucose, respectively. In auto-induction medium without antibiotics, 147 μg/mL of rSm14 and 162 μg/mL of rhG-CSF were obtained. The new vector presented high stability for the production of both recombinant proteins in complex media in Escherichia coli, even in the absence of antibiotics, making the pAR-KanI a promising vector for industrial production of recombinant proteins.
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Affiliation(s)
- Fara Amelia Primelles Eguia
- Laboratório Especial de Desenvolvimento de Vacinas, Instituto Butantan, São Paulo, SP, Brazil; Programa Interunidades em Biotecnologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Henrique Roman Ramos
- Laboratório de Bacteriologia 2, Instituto Butantan, São Paulo, SP, Brazil; Departamento Saúde III, Universidade Nove de Julho, São Paulo, SP, Brazil
| | - Stefanie Kraschowetz
- Laboratório Especial de Desenvolvimento de Vacinas, Instituto Butantan, São Paulo, SP, Brazil; Programa Interunidades em Biotecnologia, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Daniel Omote
- Laboratório de Bacteriologia 2, Instituto Butantan, São Paulo, SP, Brazil
| | | | - Paulo Lee Ho
- Centro de Biotecnologia, Instituto Butantan, São Paulo, SP, Brazil; Divisão de Inovação, Instituto Butantan, São Paulo, SP, Brazil
| | - Eneas Carvalho
- Laboratório de Bacteriologia 2, Instituto Butantan, São Paulo, SP, Brazil
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Gholami Tilko P, Hajihassan Z, Moghimi H. Optimization of recombinant β-NGF expression in Escherichia coli using response surface methodology. Prep Biochem Biotechnol 2017; 47:406-413. [PMID: 27813712 DOI: 10.1080/10826068.2016.1252927] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Human nerve growth factor a member of the neurotrophin family can be used to treat neurodegenerative diseases. As it has disulfide bonds in its structure, periplasmic expression of it using appropriate signal sequence is beneficial. Therefore, in this work β-nerve growth factor (β-NGF) was expressed in Escherichia coli using pET39b expression vector containing DsbA signal sequence. In an initial step, the effect of isopropyl β-D-1-thiogalactopyranoside (IPTG) and lactose concentration as inducer on protein production was investigated using response surface methodology. Then the effect of different postinduction time and temperature on protein production was studied. Our results indicated that the highest β-NGF production was achieved with 1 mM IPTG and low concentrations of lactose (0-2% w/v), low cultivation temperature of 25°C and postinduction time of 2 hr. Also following β-NGF purification, bioassay test using PC12 cell line was done. The biological activity of the purified β-NGF showed a similar cell proliferation activity with the standard recombinant human β-NGF. In conclusion, the results indicated an optimized upstream process to obtain high yields of biologically active β-NGF.
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Affiliation(s)
- Pouria Gholami Tilko
- a Department of Life Science Engineering, Faculty of New Sciences and Technologies , University of Tehran , Tehran , Iran.,b Department of Microbial Biotechnology, School of Biology, College of Science , University of Tehran , Tehran , Iran
| | - Zahra Hajihassan
- a Department of Life Science Engineering, Faculty of New Sciences and Technologies , University of Tehran , Tehran , Iran
| | - Hamid Moghimi
- b Department of Microbial Biotechnology, School of Biology, College of Science , University of Tehran , Tehran , Iran
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Haq IU, Akram F. Enhanced Production of a Recombinant Multidomain Thermostable GH9 Processive Endo-1,4-β-Glucanase (CenC) from Ruminiclostridium thermocellum in a Mesophilic Host Through Various Cultivation and Induction Strategies. Appl Biochem Biotechnol 2017; 183:171-188. [PMID: 28247309 DOI: 10.1007/s12010-017-2437-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 02/10/2017] [Indexed: 01/09/2023]
Abstract
Commonly, unintentional induction and inadvertently preparing medium for engineered Escherichia coli BL21 CodonPlus (DE3)-RIPL, give poor or variable yields of heterologous proteins. Therefore, to enhance the activity and production of an industrially relevant recombinant processive endo-1,4-β-glucanase (CenC) propagated in Escherichia coli BL21 CodonPlus(DE3)-RIPL through various cultivation and induction strategies. Investigation of various growth media and induction parameters revealed that high-cell-density and optimal CenC expression were obtained in ZYBM9 medium induced either with 0.5 mM IPTG/150 mM lactose, after 6 h induction at 37 °C; and before induction, bacterial cells were given heat shock (42 °C) for 1 h when culture density (OD600nm) reached at 0.6. Intracellular enzyme activity was enhanced by 6.67 and 3.20-fold in ZYBM9 and 3×ZYBM9 medium, respectively, under optimal conditions. Using YNG auto-induction medium, activity was 2.5-fold increased after 10 h incubation at 37 °C. Approximately similar results were obtained by transferring the optimized process at the bioreactor level. Results showed that the effective process strategy is essential to enhance recombinant bacterial cell mass and enzyme production from small to large-scale. To the best of our knowledge, this is the first ever report on enhanced production of thermostable processive endo-1,4-β-glucanase cloned from Ruminiclostridium thermocellum, which is a suitable candidate for industrial applications. Graphical Abstract Flow Chart Summary of Enhanced Production of a Recombinant Multidomain Thermostable GH9 Processive Endo-1,4-β-glucanase from Ruminiclostridium thermocellum.
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Affiliation(s)
- Ikram Ul Haq
- Institute of Industrial Biotechnology, GC University, Lahore, -54000, Pakistan
| | - Fatima Akram
- Institute of Industrial Biotechnology, GC University, Lahore, -54000, Pakistan.
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Moradian C, Fazeli M, Abedi D. Over expression of the Interferon β-1b by optimizing induction conditions using response surface meth-odology. ACTA ACUST UNITED AC 2013. [DOI: 10.15412/j.jbtw.01020401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Secretory Expression and Purification of Recombinant Escherichia coli Heat-Labile Enterotoxin B Subunit and its Applications on Intranasal Vaccination of Hantavirus. Mol Biotechnol 2008; 41:91-8. [DOI: 10.1007/s12033-008-9101-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2008] [Accepted: 08/25/2008] [Indexed: 10/21/2022]
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Pan H, Xie Z, Bao W, Zhang J. Optimization of culture conditions to enhance cis-epoxysuccinate hydrolase production in Escherichia coli by response surface methodology. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2008.06.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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