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Shen Q, Cui J, Wang Y, Hu ZC, Xue YP, Zheng YG. Identification of a novel growth-associated promoter for biphasic expression of heterogenous proteins in Pichia pastoris. Appl Environ Microbiol 2024; 90:e0174023. [PMID: 38193674 PMCID: PMC10880622 DOI: 10.1128/aem.01740-23] [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: 09/29/2023] [Accepted: 12/01/2023] [Indexed: 01/10/2024] Open
Abstract
Pichia pastoris (P. pastoris) is one of the most popular cell factories for expressing exogenous proteins and producing useful chemicals. The alcohol oxidase 1 promoter (PAOX1) is the most commonly used strong promoter in P. pastoris and has the characteristic of biphasic expression. However, the inducer for PAOX1, methanol, has toxicity and poses risks in industrial settings. In the present study, analyzing transcriptomic data of cells collected at different stages of growth found that the formate dehydrogenase (FDH) gene ranked 4960th in relative expression among 5032 genes during the early logarithmic growth phase but rose to the 10th and 1st during the middle and late logarithmic growth phases, respectively, displaying a strict biphasic expression characteristic. The unique transcriptional regulatory profile of the FDH gene prompted us to investigate the properties of its promoter (PFDH800). Under single-copy conditions, when a green fluorescent protein variant was used as the expression target, the PFDH800 achieved 119% and 69% of the activity of the glyceraldehyde-3-phosphate dehydrogenase promoter and PAOX1, respectively. After increasing the copy number of the expression cassette in the strain to approximately four copies, the expression level of GFPuv driven by PFDH800 increased to approximately 2.5 times that of the strain containing GFPuv driven by a single copy of PAOX1. Our PFDH800-based expression system exhibited precise biphasic expression, ease of construction, minimal impact on normal cellular metabolism, and high strength. Therefore, it has the potential to serve as a new expression system to replace the PAOX1 promoter.IMPORTANCEThe alcohol oxidase 1 promoter (PAOX1) expression system has the characteristics of biphasic expression and high expression levels, making it the most widely used promoter in the yeast Pichia pastoris. However, PAOX1 requires methanol induction, which can be toxic and poses a fire hazard in large quantities. Our research has found that the activity of PFDH800 is closely related to the growth state of cells and can achieve biphasic expression without the need for an inducer. Compared to other reported non-methanol-induced biphasic expression systems, the system based on the PFDH800 offers several advantages, including high expression levels, simple construction, minimal impact on cellular metabolism, no need for an inducer, and the ability to fine-tune expression.
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Affiliation(s)
- Qi Shen
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, China
- National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, China
| | - Jie Cui
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, China
- National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, China
| | - Yang Wang
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, China
- National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, China
| | - Zhong-Ce Hu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, China
- National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, China
| | - Ya-Ping Xue
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, China
- National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, China
| | - Yu-Guo Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China
- Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, China
- National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, China
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Liu YH, Song YH, Ruan YL. Sugar conundrum in plant-pathogen interactions: roles of invertase and sugar transporters depend on pathosystems. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:1910-1925. [PMID: 35104311 PMCID: PMC8982439 DOI: 10.1093/jxb/erab562] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/25/2021] [Indexed: 06/12/2023]
Abstract
It has been increasingly recognized that CWIN (cell wall invertase) and sugar transporters including STP (sugar transport protein) and SWEET (sugar will eventually be exported transporters) play important roles in plant-pathogen interactions. However, the information available in the literature comes from diverse systems and often yields contradictory findings and conclusions. To solve this puzzle, we provide here a comprehensive assessment of the topic. Our analyses revealed that the regulation of plant-microbe interactions by CWIN, SWEET, and STP is conditioned by the specific pathosystems involved. The roles of CWINs in plant resistance are largely determined by the lifestyle of pathogens (biotrophs versus necrotrophs or hemibiotrophs), possibly through CWIN-mediated salicylic acid or jasmonic acid signaling and programmed cell death pathways. The up-regulation of SWEETs and STPs may enhance or reduce plant resistance, depending on the cellular sites from which pathogens acquire sugars from the host cells. Finally, plants employ unique mechanisms to defend against viral infection, in part through a sugar-based regulation of plasmodesmatal development or aperture. Our appraisal further calls for attention to be paid to the involvement of microbial sugar metabolism and transport in plant-pathogen interactions, which is an integrated but overlooked component of such interactions.
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Affiliation(s)
- Yong-Hua Liu
- School of Horticulture, Hainan University, Haikou, China
- Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province, Haikou, China
| | - You-Hong Song
- Innovation Cluster of Crop Molecular Biology and Breeding, Anhui Agricultural University, Hefei, China
- School of Agronomy, Anhui Agricultural University, Hefei, China
| | - Yong-Ling Ruan
- Innovation Cluster of Crop Molecular Biology and Breeding, Anhui Agricultural University, Hefei, China
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia
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Doan CT, Tran TN, Nguyen TT, Tran TPH, Nguyen VB, Tran TD, Nguyen AD, Wang SL. Production of Sucrolytic Enzyme by Bacillus licheniformis by the Bioconversion of Pomelo Albedo as a Carbon Source. Polymers (Basel) 2021; 13:polym13121959. [PMID: 34199171 PMCID: PMC8231626 DOI: 10.3390/polym13121959] [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: 05/14/2021] [Revised: 06/10/2021] [Accepted: 06/10/2021] [Indexed: 11/30/2022] Open
Abstract
Recently, there has been increasing use of agro-byproducts in microbial fermentation to produce a variety of value-added products. In this study, among various kinds of agro-byproducts, pomelo albedo powder (PAP) was found to be the most effective carbon source for the production of sucrose hydrolyzing enzyme by Bacillus licheniformis TKU004. The optimal medium for sucrolytic enzyme production contained 2% PAP, 0.75% NH4NO3, 0.05% MgSO4, and 0.05% NaH2PO4 and the optimal culture conditions were pH 6.7, 35 °C, 150 rpm, and 24 h. Accordingly, the highest sucrolytic activity was 1.87 U/mL, 4.79-fold higher than that from standard conditions using sucrose as the carbon source. The purified sucrolytic enzyme (sleTKU004) is a 53 kDa monomeric protein and belongs to the glycoside hydrolase family 68. The optimum temperature and pH of sleTKU004 were 50 °C, and pH = 6, respectively. SleTKU004 could hydrolyze sucrose, raffinose, and stachyose by attacking the glycoside linkage between glucose and fructose molecules of the sucrose unit. The Km and Vmax of sleTKU004 were 1.16 M and 5.99 µmol/min, respectively. Finally, sleTKU004 showed strong sucrose tolerance and presented the highest hydrolytic activity at the sucrose concentration of 1.2 M–1.5 M.
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Affiliation(s)
- Chien Thang Doan
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan; (C.T.D.); (T.N.T.)
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Thi Ngoc Tran
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan; (C.T.D.); (T.N.T.)
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Thi Thanh Nguyen
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Thi Phuong Hanh Tran
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Van Bon Nguyen
- Institute of Biotechnology and Environment, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (V.B.N.); (A.D.N.)
| | - Trung Dung Tran
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Anh Dzung Nguyen
- Institute of Biotechnology and Environment, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (V.B.N.); (A.D.N.)
| | - San-Lang Wang
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan; (C.T.D.); (T.N.T.)
- Life Science Development Center, Tamkang University, New Taipei City 25137, Taiwan
- Correspondence: ; Tel.: +886-2-2621-5656; Fax: +886-2-2620-9924
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Rahmatabadi SS, Sadeghian I, Ghasemi Y, Sakhteman A, Hemmati S. Identification and characterization of a sterically robust phenylalanine ammonia-lyase among 481 natural isoforms through association of in silico and in vitro studies. Enzyme Microb Technol 2018; 122:36-54. [PMID: 30638507 DOI: 10.1016/j.enzmictec.2018.12.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 11/14/2018] [Accepted: 12/09/2018] [Indexed: 10/27/2022]
Abstract
The enzyme phenylalanine ammonia lyase (PAL) is of special importance for the treatment of phenylketonuria patients. The aim of this study was to find a stable recombinant PAL with suitable kinetic properties among all natural PAL producing species using in silico and experimental approaches. To find such a stable PAL among 481 natural isoforms, 48,000 of 3-D models were predicted using the Modeller 9.10 program and evaluated by Ramachandran plot. Correlation analysis between Ramachandran plot and the energy of different thermodynamic components indicated that this plot could be an appropriate tool to predict protein stability. Hence, PAL6 from Lotus japonicus (LjPAL6) was selected as a stable isoform. Molecular dynamic (MD) simulation for 50 ns and docking has been conducted for LjPAL6-phenylalanine complex. The best PAL-phenylalanine frame was selected by re-docking with l-phenylalanine (L-Phe) and root-mean-square deviation (RMSD) value. MD simulation showed that the complex has a good stability, depicted by the low RMSD value, binding free energy and hydrogen bindings. Docking results showed that LjPAL6 has a high affinity toward l-Phe according to the low level of binding free energy. By overexpressing Ljpal6 in E. coli BL21, a total of 33.5 mg/l of protein was obtained, which has been increased to 83.7 mg/l via the optimization of LjPAL6 production using response surface methodology. The optimal pH and temperature were 8.5 and 50 °C, respectively. LjPAL6 showed a specific activity of 42 nkat/mg protein, with Km, Kcat and Kcat/Km values of 0.483 mM, 7 S-1 and 14.5 S-1 mM-1 for l-phe, respectively. In conclusion, finding models with the most reasonable stereo-chemical quality and lowest numbers of steric clashes would result in easier folding. Hence, in silico analyses of bulk data from natural origin will lead one to find an optimal model for in vitro studies and drug design.
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Affiliation(s)
- Seyyed Soheil Rahmatabadi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Issa Sadeghian
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Younes Ghasemi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amirhossein Sakhteman
- Department of Medicinal Chemistry, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Shiva Hemmati
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran; Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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Lincoln L, More SS. Bacterial invertases: Occurrence, production, biochemical characterization, and significance of transfructosylation. J Basic Microbiol 2017; 57:803-813. [DOI: 10.1002/jobm.201700269] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/22/2017] [Accepted: 06/28/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Lynette Lincoln
- Department of Biochemistry; Centre for Post Graduate Studies; Jain University; Bengaluru Karnataka India
| | - Sunil S. More
- School of Basic and Applied Sciences; Dayananda Sagar University; Bengaluru Karnataka India
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Kumar C, Wagh J, Archana G, Naresh Kumar G. Sucrose dependent mineral phosphate solubilization in Enterobacter asburiae PSI3 by heterologous overexpression of periplasmic invertases. World J Microbiol Biotechnol 2016; 32:194. [DOI: 10.1007/s11274-016-2153-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 09/28/2016] [Indexed: 11/30/2022]
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Pérez de los Santos AI, Cayetano-Cruz M, Gutiérrez-Antón M, Santiago-Hernández A, Plascencia-Espinosa M, Farrés A, Hidalgo-Lara ME. Improvement of catalytical properties of two invertases highly tolerant to sucrose after expression in Pichia pastoris . Effect of glycosylation on enzyme properties. Enzyme Microb Technol 2016; 83:48-56. [DOI: 10.1016/j.enzmictec.2015.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 11/23/2015] [Accepted: 11/25/2015] [Indexed: 11/16/2022]
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Ismail NF, Lim TS. Site-specific scFv labelling with invertase via Sortase A mechanism as a platform for antibody-antigen detection using the personal glucose meter. Sci Rep 2016; 6:19338. [PMID: 26782912 PMCID: PMC4726117 DOI: 10.1038/srep19338] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 11/17/2015] [Indexed: 12/17/2022] Open
Abstract
Antibody labelling to reporter molecules is gaining popularity due to its many potential applications for diagnostics and therapeutics. However, non-directional bioconjugation methods which are commonly used often results in the loss of target binding capabilities. Therefore, a site-specific enzymatic based bioconjugation such as sortase-mediated transpeptidation allows for a more rapid and efficient method of antibody conjugation for diagnostic applications. Here we describe the utilization of sortase A bioconjugation to conjugate a single chain fragment variable (scFv) to the extracellular invertase (invB) from Zymomonas mobilis with the aim of developing an invertase based immunoassay. In addition, conjugation to enhanced green fluorescent protein (eGFP) was also validated to show the flexibility of the method. The invertase conjugated complex was successfully applied for the detection of antibody-antigen interaction using a personal glucose meter (PGM) for assay readout. The setup was used in both a direct and competitive assay highlighting the robustness of the conjugate for assay development. The method provides an alternative conjugation process to allow easy exchange of antibodies to facilitate rapid development of diagnostic assays for various diseases on the PGM platform.
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Affiliation(s)
- Nur Faezee Ismail
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Penang, Malaysia
| | - Theam Soon Lim
- Institute for Research in Molecular Medicine, Universiti Sains Malaysia, 11800 Penang, Malaysia
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Cloning, expression, and purification of a synthetic human growth hormone in Escherichia coli using response surface methodology. Mol Biotechnol 2015; 57:241-50. [PMID: 25380986 DOI: 10.1007/s12033-014-9818-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The aim of this study was to achieve high-level production of the human growth hormone (hGH) in the prokaryotic expression system. In this regard, we performed cloning, expression, and purification of a synthetic hGH gene in BL21 (DE3) strain of E. coli. The hGH production was determined by SDS-PAGE and western blotting techniques, and then the protein concentration was determined by the Bradford assay. To gain insight into the effect of different nutrients on the growth of E. coli and hGH production, in a preliminary assessment nine different types of the basal medium were analyzed. The highest growth of E. coli and hGH production were observed in TB and SOB media. Accordingly, design of experiments was employed for screening the most significant nutrients, and central composite face design was applied for the optimization. The optimum medium consisted of yeast extract (10 g/L), tryptone (10 g/L), and K2HPO4 (2 g/L). The optimum hGH concentration was 391 mg/L, which was 3-fold higher than the hGH concentration in the LB basal medium (119 mg/L). This production rate is the highest hGH concentration reported in the IPTG-inducible expression systems.
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Morowvat MH, Babaeipour V, Rajabi Memari H, Vahidi H. Optimization of Fermentation Conditions for Recombinant Human Interferon Beta Production by Escherichia coli Using the Response Surface Methodology. Jundishapur J Microbiol 2015; 8:e16236. [PMID: 26034535 PMCID: PMC4449858 DOI: 10.5812/jjm.8(4)2015.16236] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 07/20/2014] [Accepted: 08/06/2014] [Indexed: 02/03/2023] Open
Abstract
Background: The periplasmic overexpression of recombinant human interferon beta (rhIFN-β)-1b using a synthetic gene in Escherichia coli BL21 (DE3) was optimized in shake flasks using Response Surface Methodology (RSM) based on the Box-Behnken Design (BBD). Objectives: This study aimed to predict and develop the optimal fermentation conditions for periplasmic expression of rhIFN-β-1b in shake flasks whilst keeping the acetate excretion as the lowest amount and exploit the best results condition for rhIFN-β in a bench top bioreactor. Materials and Methods: The process variables studied were the concentration of glucose as carbon source, cell density prior the induction (OD 600 nm) and induction temperature. Ultimately, a three-factor three-level BBD was employed during the optimization process. The rhIFN-β production and the acetate excretion served as the evaluated responses. Results: The proposed optimum fermentation condition consisted of 7.81 g L-1 glucose, OD 600 nm prior induction 1.66 and induction temperature of 30.27°C. The model prediction of 0.267 g L-1 of rhIFN-β and 0.961 g L-1 of acetate at the optimum conditions was verified experimentally as 0.255 g L-1 and 0.981 g L-1 of acetate. This agreement between the predicted and observed values confirmed the precision of the applied method to predict the optimum conditions. Conclusions: It can be concluded that the RSM is an effective method for the optimization of recombinant protein expression using synthetic genes in E. coli.
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Affiliation(s)
- Mohammad Hossein Morowvat
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Valiollah Babaeipour
- Biochemical Engineering Group, Biotechnology Research Center, Malek-Ashtar University of Technology, Tehran, IR Iran
- Department of Bioscience Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, IR Iran
- Corresponding author: Valiollah Babaeipour, Department of Bioscience Engineering, Faculty of New Sciences and Technologies, University of Tehran, P. O. Box 14395-1374, Tehran, IR Iran. Tel/Fax: +98-2122974614, E-mail: .
| | - Hamid Rajabi Memari
- Department of Agronomy and Plant Breeding, College of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, IR Iran
| | - Hossein Vahidi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
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Tris–sucrose buffer system: a new specially designed medium for extracellular invertase production by immobilized cells of isolated yeast Cryptococcus laurentii MT-61. Folia Microbiol (Praha) 2013; 59:9-16. [DOI: 10.1007/s12223-013-0258-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 05/12/2013] [Indexed: 10/26/2022]
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Taskin M, Esim N, Genisel M, Ortucu S, Hasenekoglu I, Canli O, Erdal S. ENHANCEMENT OF INVERTASE PRODUCTION BYAspergillus nigerOZ-3 USING LOW-INTENSITY STATIC MAGNETIC FIELDS. Prep Biochem Biotechnol 2013; 43:177-88. [DOI: 10.1080/10826068.2012.713431] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Canli O, Erdal S, Taskin M, Kurbanoglu EB. Effects of extremely low magnetic field on the production of invertase by Rhodotorula glutinis. Toxicol Ind Health 2010; 27:35-9. [PMID: 20713431 DOI: 10.1177/0748233710380219] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Invertase is an important enzyme used in many fields especially in food industry to produce fructose syrups. The current study focused on increasing invertase production by exposing Rhodotorula glutinis to extremely low magnetic fields (ELMF; 0 and 7 mT). For this purpose, the microorganism was allowed to grow in normal magnetic field and ELMF for 72 hours at the same temperature (24 ± 2°C). The fermentation was carried out in submerged culture for 120 hours. The results showed that invertase production is strongly dependent on the growth conditions of the microorganism. Both of the different magnetic fields applied to R. glutinis increased invertase production ranged from 48%-67% when compared with the control. On the other hand, ELMF treatment increased biomass formation about 14%-28% when compared with the control. As a result, magnetic field treatment could effectively be used in the production of invertase by R. glutinis.
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Affiliation(s)
- Ozden Canli
- Department of Biology, Science Faculty, Ataturk University, Erzurum, Turkey.
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Optimization of an induction strategy for improving interferon-α2b production in the periplasm ofEscherichia coliusing response surface methodology. Biotechnol Appl Biochem 2010; 56:141-50. [DOI: 10.1042/ba20100104] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Expression and characterization of Trichoderma virens UKM-1 endochitinase in Escherichia coli. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9924-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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The cyclodextrin glycosyltransferase of Paenibacillus pabuli US132 strain: molecular characterization and overproduction of the recombinant enzyme. J Biomed Biotechnol 2008; 2008:692573. [PMID: 18704190 PMCID: PMC2504920 DOI: 10.1155/2008/692573] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 05/22/2008] [Accepted: 06/21/2008] [Indexed: 11/18/2022] Open
Abstract
The gene encoding the cyclodextrin glycosyltransferase (CGTase) of Paenibacillus pabuli US132, previously described as efficient antistaling agent and good candidate for cyclodextrins production, was cloned, sequenced, and expressed in Escherichia coli. Sequence analysis showed that the mature enzyme (684 amino acids) was preceded by a signal peptide of 34 residues. The enzyme exhibited the highest identity (94%) to the beta-CGTase of Bacillus circulans no. 8. The production of the recombinant CGTase, as active form, was very low (about 1 U/mL) in shake flasks at 37 degrees C. This production reached 22 U/mL after 22 hours of induction by mainly shifting the postinduction temperature from 37 to 19 degrees C and using 2TY instead of LB medium. High enzyme production (35 U/mL) was attained after 18 hours of induction in fermentor using the same culture conditions as in shake flask. The recombinant enzyme showed V(max) and K(m) values of 253 +/- 36 mumol of beta-cyclodextrin/mg/min and 0.36 +/- 0.18 g/L, respectively.
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Vallejo-Becerra V, Vásquez-Bahena JM, Santiago-Hernández JA, Hidalgo-Lara ME. Immobilization of the recombinant invertase INVB from Zymomonas mobilis on Nylon-6. J Ind Microbiol Biotechnol 2008; 35:1289-95. [DOI: 10.1007/s10295-008-0426-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2008] [Accepted: 07/29/2008] [Indexed: 10/21/2022]
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Vallejo-Becerra V, Marín-Zamora ME, Vásquez-Bahena JM, Rojas-Melgarejo F, Hidalgo-Lara ME, García-Ruiz PA. Immobilization of recombinant invertase (re-INVB) from Zymomonas mobilis on D-sorbitol cinnamic ester for production of invert sugar. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:1392-1397. [PMID: 18237126 DOI: 10.1021/jf072646h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The recombinant invertase (re-INVB) from Zymomonas mobilis was immobilized by adsorption onto the totally cinnamoylated derivative of D-sorbitol. The polymerization and cross-linking of the derivative initially obtained was achieved by irradiation in the ultraviolet region, where this prepolymer shows maximum sensitivity. Immobilization of re-INVB on this support involves a process of physical adsorption and intense hydrophobic interactions between the cinnamoyl groups of the support and related groups of the enzyme. Enzyme concentration, immobilization time, and irradiation time were important parameters affecting the immobilization efficiency. The optimum reaction pH of immobilized enzyme was 5, and the optimal reaction temperature was 40 degrees C. The apparent Michaelis constant and the apparent catalytic constant of re-INVB immobilized on the SOTCN derivative acting on sucrose was 78+/-5 mM and 5x10(4)+/-3x10(2) s(-1), respectively, while for the free enzyme, it was 98.0+/-4 mM and 1.2x10(4)+/-2.5x10(2) s(-1), respectively, suggesting a better apparent affinity of the enzyme for the substrate and a better hydrolysis rate when immobilized than when in solution. Immobilized re-INVB also showed good thermal stability and good operational stability (40% of the initial activity remaining after 45 cyles of 1 min duration and 90.6 mg of sucrose being hydrolyzed in 45 min per 2.5 mg of immobilized protein). The results showed that cinnamic carbohydrate esters of D-sorbitol are an appropriate support for re-INVB immobilization and the production of invert sugar.
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