1
|
Chang MS, Lee CY, Liu ES, Chao H, Wu HY, Chang YY, Liu YL, Chen YT, Su YC, Wang YT, Cheng TL, Yen CH, Lin CW, Huang HK, Lin WW. A Low-Cost, Sensitive Reporter System Using Membrane-Tethered Horseradish Peroxidase for Efficient Gene Expression Analysis. Anal Chem 2023; 95:14341-14349. [PMID: 37715702 DOI: 10.1021/acs.analchem.3c02684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/18/2023]
Abstract
Reporter gene assays are essential for high-throughput analysis, such as drug screening or determining downstream signaling activation/inhibition. However, use of this technology has been hampered by the high cost of the substrate (e.g., d-Luciferin (d-Luc)) in the most common firefly luciferase (FLuc) reporter gene assay. Although alternate luciferase is available worldwide, its substrate has remained expensive, and a more affordable option is still in demand. Here, we present a membrane-tethered horseradish peroxidase (mHRP), a new reporter system composed of a cell membrane expressing HRP that can preserve its enzymatic function on the cell surface, facilitates contact with HRP substrates (e.g., ABTS and TMB), and avoids the cell lysis process and the use of the high-priced luciferase substrate. An evaluation of the light signal sensitivity of mHRP compared to FLuc showed that both had comparable signal sensitivity. We also identified an extended substrate half-life of more than 5-fold that of d-Luc. Of note, this strategy provided a more stable detection signal, and the cell lysis process is not mandatory. Furthermore, with this strategy, we decreased the total amount of time taken for analysis and increased the time of detection limit of the reporter assay. Pricing analysis showed a one-third to one twenty-eighth price drop per single test of reporter assay. Given the convenience and stability of the mHRP reporter system, we believe that our strategy is suitable for use as an alternative to the luciferase reporter assay.
Collapse
Affiliation(s)
- Mu-Shen Chang
- PhD Program in Life Science, College of Life Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Chia-Yi Lee
- Department of Biomedical Science and Environmental Biology, College of Life Science, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - En-Shuo Liu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Hsuan Chao
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Hsin-Yu Wu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yu-Yen Chang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yen-Ling Liu
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
| | - Yu-Tung Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yu-Cheng Su
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
| | - Yeng-Tseng Wang
- Department of Biochemistry, Post Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
| | - Tian-Lu Cheng
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
| | - Chia-Hung Yen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
| | - Cheng-Wei Lin
- Department of Biochemistry and Molecular Cell Biology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 11031, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
| | - Hsin-Kai Huang
- Department of Medical Laboratory, Kaohsiung Armed Forces General Hospital, Kaohsiung 80284, Taiwan
| | - Wen-Wei Lin
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Drug Development and Value Creation Research Center, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
- Department of Laboratory Medicine, Post Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708 Taiwan
- Department of Laboratory Medicine, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, 80708 Taiwan
| |
Collapse
|
2
|
Gajardo-Parra N, Meneses L, Duarte ARC, Paiva A, Held C. Assessing the Influence of Betaine-Based Natural Deep Eutectic Systems on Horseradish Peroxidase. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2022; 10:12873-12881. [PMID: 36573121 PMCID: PMC9783073 DOI: 10.1021/acssuschemeng.2c04045] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/26/2022] [Indexed: 06/02/2023]
Abstract
To validate the use of horseradish peroxidase (HRP) in natural deep eutectic systems (NADES), five different betaine-based NADES were characterized in terms of water content, water activity, density, and viscosity experimentally and by thermodynamic modeling. The results show that the NADES under study have a water activity of about 0.4 at 37 °C for water contents between 14 and 22 wt %. The densities of the studied NADES had values between 1.2 and 1.3 g.cm-3 at 20 °C. The density was modeled with a state-of-the-art equation of state; an excellent agreement with the experimental density data was achieved, allowing reasonable predictions for water activities. The system betaine:glycerol (1:2) was found to be the most viscous with a dynamic viscosity of ∼600 mPa.s at 40 °C, while all the other systems had viscosities <350 mPa.s at 40 °C. The impact of the NADES on the enzymatic activity, as well as on, conformational and thermal stability was assessed. The system betaine/sorbitol:water (1:1:3) showed the highest benefit for enzymatic activity, increasing it by two-folds. Moreover, upon NADES addition, thermal stability was increased followed by an increment in a-helix secondary structure content.
Collapse
Affiliation(s)
- Nicolás
F. Gajardo-Parra
- Laboratory
of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Str. 70, 44227 Dortmund, Germany
| | - Liane Meneses
- LAQV-REQUIMTE,
Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2825-149 Caparica, Portugal
| | - Ana Rita C. Duarte
- LAQV-REQUIMTE,
Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2825-149 Caparica, Portugal
| | - Alexandre Paiva
- LAQV-REQUIMTE,
Department of Chemistry, School of Science and Technology, NOVA University Lisbon, 2825-149 Caparica, Portugal
| | - Christoph Held
- Laboratory
of Thermodynamics, Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Str. 70, 44227 Dortmund, Germany
| |
Collapse
|
3
|
Patel AY, Jonnalagadda KS, Paradis N, Vaden TD, Wu C, Caputo GA. Effects of Ionic Liquids on Metalloproteins. Molecules 2021; 26:514. [PMID: 33478102 PMCID: PMC7835893 DOI: 10.3390/molecules26020514] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/04/2021] [Accepted: 01/08/2021] [Indexed: 01/28/2023] Open
Abstract
In the past decade, innovative protein therapies and bio-similar industries have grown rapidly. Additionally, ionic liquids (ILs) have been an area of great interest and rapid development in industrial processes over a similar timeline. Therefore, there is a pressing need to understand the structure and function of proteins in novel environments with ILs. Understanding the short-term and long-term stability of protein molecules in IL formulations will be key to using ILs for protein technologies. Similarly, ILs have been investigated as part of therapeutic delivery systems and implicated in numerous studies in which ILs impact the activity and/or stability of protein molecules. Notably, many of the proteins used in industrial applications are involved in redox chemistry, and thus often contain metal ions or metal-associated cofactors. In this review article, we focus on the current understanding of protein structure-function relationship in the presence of ILs, specifically focusing on the effect of ILs on metal containing proteins.
Collapse
Affiliation(s)
- Aashka Y. Patel
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | | | - Nicholas Paradis
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | - Timothy D. Vaden
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
| | - Chun Wu
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
| | - Gregory A. Caputo
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA; (A.Y.P.); (N.P.); (T.D.V.); (C.W.)
- Department of Molecular and Cellular Biosciences, Rowan University, Glassboro, NJ 08028, USA
| |
Collapse
|
4
|
Quinone-based antibody labeling reagent for enzyme-free chemiluminescent immunoassays. Application to avidin and biotinylated anti-rabbit IgG labeling. Biosens Bioelectron 2020; 160:112215. [DOI: 10.1016/j.bios.2020.112215] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/27/2020] [Accepted: 04/13/2020] [Indexed: 12/16/2022]
|
5
|
Polacco S, Wilson P, Illes M, Vreugdenhil AJ, Stotesbury T. Luminol reagent control materials in bloodstain pattern analysis: A silicon sol-gel polymer alternative. Forensic Chem 2019. [DOI: 10.1016/j.forc.2019.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
6
|
Hadizadeh Shirazi N. Inhibition kinetic and thermal inactivation of horseradish peroxidase in the presence of Zn 2+ ion. J Food Biochem 2018; 43:e12724. [PMID: 31353644 DOI: 10.1111/jfbc.12724] [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] [Received: 07/12/2018] [Revised: 10/15/2018] [Accepted: 10/17/2018] [Indexed: 11/30/2022]
Abstract
Peroxidase as a heme-containing metalloprotein, is an important enzyme for food industries. Hence, the current study is aimed to evaluate the inhibitory properties of zinc ion in terms of activity and thermal stability of horseradish peroxidase (HRP) in the range of 40-70°C for 1-45 min. The results showed that zinc ion potently inhibited HRP activity by noncompetitive mechanism. The thermal inactivation of enzyme followed first-order reaction kinetics in the presence of ZnCl2 up to 300 μM. However, higher concentrations of Zn2+ -induced irregularities in HRP thermo inactivation pattern from first-order kinetics. According to the kinetic parameters, K and Ea , the rate of reactivation of HRP may be dependent on the amount of zinc ion, inactivation time, and heating duration. PRACTICAL APPLICATIONS: Thermal inactivation kinetics of HRP was investigated in the presence of Zn2+ . The results showed that thermal inactivation of HRP followed first-order kinetics for up to 300 μM of Zn2+ . HRP inactivation was consistent with biphasic models for higher concentrations of Zn2+ at 60°C. The transition free energy of inactivation confirmed that zinc ion increased the enzyme unfolding transition states stability as denatured structure of HRP is more favorable than native one in this condition. Moreover, reactivation potential of enzyme decreased by increasing the zinc ion concentration.
Collapse
|
7
|
Costa AR, Passos MLC, Pinto PCAG, Pereira SAP, Saraiva MLMFS. The role of ionic liquids in the biocatalytic evaluation of bisphenol levels as contaminant: an automatic approach. Analyst 2018; 143:2426-2434. [DOI: 10.1039/c8an00154e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Automation of peroxidase activity evaluation and bisphenol A quantification in ionic liquids medium.
Collapse
Affiliation(s)
- Ana Raquel Costa
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | - Marieta L. C. Passos
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | - Paula C. A. G. Pinto
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | - Sarah A. P. Pereira
- LAQV
- REQUIMTE
- Department of Chemical Sciences
- Laboratory of Applied Chemistry
- Faculty of Pharmacy
| | | |
Collapse
|
8
|
Affiliation(s)
- Toshiyuki Itoh
- Department
of Chemistry and Biotechnology, Graduate School of Engineering and ‡Center for Research
on Green Sustainable Chemistry, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan
| |
Collapse
|
9
|
Kumar A, Bisht M, Venkatesu P. Biocompatibility of ionic liquids towards protein stability: A comprehensive overview on the current understanding and their implications. Int J Biol Macromol 2017; 96:611-651. [DOI: 10.1016/j.ijbiomac.2016.12.005] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 10/20/2022]
|
10
|
Sivapragasam M, Moniruzzaman M, Goto M. Recent advances in exploiting ionic liquids for biomolecules: Solubility, stability and applications. Biotechnol J 2016; 11:1000-13. [PMID: 27312484 DOI: 10.1002/biot.201500603] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 03/30/2016] [Accepted: 05/17/2016] [Indexed: 12/21/2022]
Abstract
The technological utility of biomolecules (e.g. proteins, enzymes and DNA) can be significantly enhanced by combining them with ionic liquids (ILs) - potentially attractive "green" and "designer" solvents - rather than using in conventional organic solvents or water. In recent years, ILs have been used as solvents, cosolvents, and reagents for biocatalysis, biotransformation, protein preservation and stabilization, DNA solubilization and stabilization, and other biomolecule-based applications. Using ILs can dramatically enhance the structural and chemical stability of proteins, DNA, and enzymes. This article reviews the recent technological developments of ILs in protein-, enzyme-, and DNA-based applications. We discuss the different routes to increase biomolecule stability and activity in ILs, and the design of biomolecule-friendly ILs that can dissolve biomolecules with minimum alteration to their structure. This information will be helpful to design IL-based processes in biotechnology and the biological sciences that can serve as novel and selective processes for enzymatic reactions, protein and DNA stability, and other biomolecule-based applications.
Collapse
Affiliation(s)
- Magaret Sivapragasam
- Centre of Research in Ionic Liquids (CORIL), Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Malaysia
| | - Muhammad Moniruzzaman
- Centre of Research in Ionic Liquids (CORIL), Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Malaysia
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Fukuoka, Japan.
- Center for Future Chemistry, Kyushu University, Fukuoka, Japan.
| |
Collapse
|
11
|
Prodanovic O, Spasojevic D, Prokopijevic M, Radotic K, Markovic N, Blazic M, Prodanovic R. Tyramine modified alginates via periodate oxidation for peroxidase induced hydrogel formation and immobilization. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2015.06.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
12
|
Recent Advances in the Applications of Ionic Liquids in Protein Stability and Activity: A Review. Appl Biochem Biotechnol 2014; 172:3701-20. [DOI: 10.1007/s12010-014-0813-6] [Citation(s) in RCA: 183] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 02/14/2014] [Indexed: 01/28/2023]
|
13
|
Kumar A, Venkatesu P. Does the stability of proteins in ionic liquids obey the Hofmeister series? Int J Biol Macromol 2013; 63:244-53. [PMID: 24211268 DOI: 10.1016/j.ijbiomac.2013.10.031] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 10/23/2013] [Accepted: 10/24/2013] [Indexed: 11/27/2022]
Abstract
Understanding the behavior of Hofmeister anions of ionic liquids (ILs) on protein stability helps to shed light on how the anions interact with proteins in aqueous solution and is a long standing object for chemistry and biochemistry. Ions effects play a major role in understanding the physicochemical and biological phenomenon that undertakes the protein folding/unfolding and refolding process. Despite the generality of these effects, our understanding of ions at the molecular-level is still limited. This review offers a tour through past successful investigations and presents a challenge in current research in the field to reassess the possibilities of ions and to apply new strategies. This review highlights on the stability behavior of the proteins and also comparisons of our past research work in the Hofmeister series of ILs. Furthermore, we specifically focus on the critical discussion on the recent findings with existing results and their implications, along with our understanding of the Hofmeister series of anions of ILs on biomolecular stability. A detailed examination of the difference between selective proteins can provide a better understanding of the molecular mechanism of protein folding/unfolding in the presence of the Hofmeister series of ions of ILs.
Collapse
Affiliation(s)
- Awanish Kumar
- Department of Chemistry, University of Delhi, Delhi 110 007, India
| | | |
Collapse
|
14
|
Machado MF, Queirós RP, Santos MD, Fidalgo LG, Delgadillo I, Saraiva JA. Effect of ionic liquids alkyl chain length on horseradish peroxidase thermal inactivation kinetics and activity recovery after inactivation. World J Microbiol Biotechnol 2013; 30:487-94. [DOI: 10.1007/s11274-013-1466-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Accepted: 08/16/2013] [Indexed: 10/26/2022]
|
15
|
Hou XD, Liu QP, Smith TJ, Li N, Zong MH. Evaluation of toxicity and biodegradability of cholinium amino acids ionic liquids. PLoS One 2013; 8:e59145. [PMID: 23554985 PMCID: PMC3598705 DOI: 10.1371/journal.pone.0059145] [Citation(s) in RCA: 173] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 02/12/2013] [Indexed: 11/18/2022] Open
Abstract
Cholinium amino acid ionic liquids ([Ch][AA] ILs), which are wholly composed of renewable biomaterials, have recently been demonstrated to have very promising properties for applications in organic synthesis and biomass pretreatment. In this work, the toxicity of these ILs toward enzymes and bacteria was assessed, and the effect of the anion on these properties is discussed. The inhibitory potentials of this type of ILs to acetylcholinesterase were weaker approximately an order of magnitude than the traditional IL 1-butyl-3-methylimidazolium tetrafluoroborate. Additionally, the [Ch][AA] ILs displayed low toxicity toward the bacteria tested. Furthermore, the biodegradability of the [Ch][AA] ILs was evaluated via the closed bottle and CO(2) headspace tests using wastewater microorganisms. All the ILs were classified as 'readily biodegradable' based on their high levels of mineralization (62-87%). The presence of extra carboxyl or amide groups on the amino acid side chain rendered the ILs significantly more susceptible to microbial breakdown. In addition, for most of the [Ch][AA] ILs, low toxicity correlated with good biodegradability. The low toxicity and high biodegradability of these novel [Ch][AA] make them promising candidates for use as environmentally friendly solvents in large-scale applications.
Collapse
Affiliation(s)
- Xue-Dan Hou
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, China
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, China
| | - Qiu-Ping Liu
- College of Bioscience and Bioengineering, South China University of Technology, Guangzhou, China
| | - Thomas J. Smith
- Biomedical Research Centre, Sheffield Hallam University, Sheffield, United Kingdom
| | - Ning Li
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, China
- * E-mail: (NL); (MHZ)
| | - Min-Hua Zong
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, China
- * E-mail: (NL); (MHZ)
| |
Collapse
|
16
|
|
17
|
Tavares APM, Rodriguez O, Macedo EA. Peroxidase biocatalysis in water-soluble ionic liquids: activity, kinetic and thermal stability. BIOCATAL BIOTRANSFOR 2012. [DOI: 10.3109/10242422.2012.715636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
18
|
Tavares APM, Pereira JAN, Xavier AMRB. Effect of ionic liquids activation on laccase fromTrametes versicolor: Enzymatic stability and activity. Eng Life Sci 2012. [DOI: 10.1002/elsc.201100203] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Ana P. M. Tavares
- LSRE-Laboratory of Separation and Reaction Engineering; Associate Laboratory LSRE/LCM, Department of Chemical Engineering; Faculty of Engineering; University of Porto; Porto; Portugal
| | - Juliana A. N. Pereira
- Centre for Research in Ceramics and Composite Materials (CICECO); Department of Chemistry; University of Aveiro; Aveiro; Portugal
| | - Ana M. R. B. Xavier
- Centre for Research in Ceramics and Composite Materials (CICECO); Department of Chemistry; University of Aveiro; Aveiro; Portugal
| |
Collapse
|
19
|
Domínguez A, Rodríguez O, Tavares APM, Macedo EA, Longo MA, Sanromán MA. Studies of laccase from Trametes versicolor in aqueous solutions of several methylimidazolium ionic liquids. BIORESOURCE TECHNOLOGY 2011; 102:7494-7499. [PMID: 21669518 DOI: 10.1016/j.biortech.2011.05.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 05/19/2011] [Accepted: 05/22/2011] [Indexed: 05/30/2023]
Abstract
Stability and kinetic behavior of laccase from Trametes versicolor in the presence of several ionic liquids from the methylimidazolium family have been investigated. In general laccase stability diminished as the size of the alkylic substitute in the methylimidazolium ring increased. Higher concentrations of ionic liquids caused more destabilization than lower ones. Thus, low concentrations of [C(2)mim(+)][EtSO(4)(-)] allowed maintaining enzymatic stability. [C(4)mim(+)][Cl(-)] appeared to have a stabilizing effect on laccase, as little activity decay was observed within three weeks. Kinetic studies indicated that both [C(2)mim(+)][EtSO(4)(-)] and [C(4)mim(+)][Cl(-)] inhibited laccase activity, although 10-fold more [C(2)mim(+)][EtSO(4)(-)] than [C(4)mim(+)][Cl(-)] was required to cause the same degree of inhibition. A kinetic model was developed to represent the experimental data.
Collapse
Affiliation(s)
- Alberto Domínguez
- Department of Chemical Engineering, University of Vigo, Edif. Isaac Newton, Lagoas Marcosende, 36310 Vigo, Spain.
| | | | | | | | | | | |
Collapse
|
20
|
Dabirmanesh B, Khajeh K, Akbari J, Falahati H, Daneshjoo S, Heydari A. Mesophilic alcohol dehydrogenase behavior in imidazolium based ionic liquids. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
21
|
Pauliukaite R, Doherty AP, Murnaghan KD, Brett CM. Application of room temperature ionic liquids to the development of electrochemical lipase biosensing systems for water-insoluble analytes. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2010.12.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
22
|
Park JH, Yoo IK, Kwon OY, Ryu K. Partial uncompetitive inhibition of horseradish peroxidase by a water-miscible ionic liquid [BMIM][MeSO4]. Biotechnol Lett 2011; 33:1657-62. [PMID: 21487782 DOI: 10.1007/s10529-011-0618-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2011] [Accepted: 04/04/2011] [Indexed: 11/30/2022]
Abstract
The ionic liquid, 1-butyl-3-methylimidazolium methylsulfate ([BMIM][MeSO(4)]), was used to investigate the catalytic mechanism of horseradish peroxidase (HRP). The ionic liquid decreased both K(m) and k(cat) values for the HRP-catalyzed oxidation of guaiacol (2-methoxyphenol) by H(2)O(2). These studies imply that [BMIM][MeSO(4)] inhibits the enzyme in an uncompetitive manner. The incorporation of substrate stabilization effects measured by a thermodynamic method into the partial uncompetitive inhibition scheme successfully describes HRP-catalysis in the presence of [BMIM][MeSO(4)], which participates as the inhibitor. The inhibition constant of the ionic liquid was 0.051 M. The turn-over number of the native HRP was almost 14-times higher than that of the HRP-ionic liquid complex indicating that [BMIM][MeSO(4)] does not form a dead-end complex with HRP.
Collapse
Affiliation(s)
- Jung Hee Park
- School of Chemical Engineering and Bioengineering, College of Engineering, University of Ulsan, Ulsan, Korea
| | | | | | | |
Collapse
|
23
|
Effect of gelatin–ionic liquid functional polymers on glucose oxidase and horseradish peroxidase kinetics. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2011.01.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
24
|
Park JH, Kwon OY, Ryu K. Substrate stabilization and noncompetitive inhibition effects of a water-miscible ionic liquid [BMPy][BF4] in the catalysis of horseradish peroxidase. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-010-0031-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
25
|
Heller WT, O’Neill HM, Zhang Q, Baker GA. Characterization of the Influence of the Ionic Liquid 1-Butyl-3-methylimidazolium Chloride on the Structure and Thermal Stability of Green Fluorescent Protein. J Phys Chem B 2010; 114:13866-71. [DOI: 10.1021/jp105611b] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William T. Heller
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Hugh M. O’Neill
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Qiu Zhang
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gary A. Baker
- Chemical Sciences Division and Center for Structural Molecular Biology, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| |
Collapse
|
26
|
Khan MS, Haniffa SB, Slater A, Garnier G. Effect of polymers on the retention and aging of enzyme on bioactive papers. Colloids Surf B Biointerfaces 2010; 79:88-96. [DOI: 10.1016/j.colsurfb.2010.03.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Revised: 03/21/2010] [Accepted: 03/25/2010] [Indexed: 11/27/2022]
|
27
|
Takács B, Nagy L, Kollár L, Nagy G. Investigation of Oxidoreductase Enzyme Catalysis in Water-Ionic Liquid (IL) Solvent Mixtures. ANAL LETT 2010. [DOI: 10.1080/00032711003653817] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
28
|
Muginova SV, Galimova AZ, Polyakov AE, Shekhovtsova TN. Ionic liquids in enzymatic catalysis and biochemical methods of analysis: Capabilities and prospects. JOURNAL OF ANALYTICAL CHEMISTRY 2010. [DOI: 10.1134/s1061934810040027] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
29
|
Hoyer H, Schlocker W, Greindl M, Ostermann T, Bernkop-Schnürch A. Preparation and evaluation of thiomer nanoparticles via high pressure homogenization. J Microencapsul 2010; 27:487-95. [DOI: 10.3109/02652040903518460] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
30
|
Gorke J, Srienc F, Kazlauskas R. Toward advanced ionic liquids. Polar, enzyme-friendly solvents for biocatalysis. BIOTECHNOL BIOPROC E 2010; 15:40-53. [PMID: 34290544 DOI: 10.1007/s12257-009-3079-z] [Citation(s) in RCA: 159] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Ionic liquids, also called molten salts, are mixtures of cations and anions that melt below 100 °C. Typical ionic liquids are dialkylimidazolium cations with weakly coordinating anions such as [MeOSO3] or [PF6]. Advanced ionic liquids such as choline citrate have biodegradable, less expensive and less toxic anions and cations. Deep eutectic solvents are also included in the advanced ionic liquids. Deep eutectic solvents are mixtures of salts such as choline chloride and uncharged hydrogen bond donors such as urea, oxalic acid, or glycerol. For example, a mixture of choline chloride and urea in 1:2 molar ratio liquifies to form a deep eutectic solvent. Their properties are similar to those of ionic liquids. Water-miscible ionic liquids as cosolvents with water enhance the solubility of substrates or products. Although traditional water-miscible organic solvents also enhance solubility, they often inactivate enzymes, while ionic liquids do not. The enhanced solubility of substrates can increase the rate of reaction and often increases the regio- or enantioselectivity. Ionic liquids can also be solvents for non-aqueous reactions. In these cases, they are especially suited to dissolve polar substrates. Polar organic solvent alternatives inactivate enzymes, but ionic liquids do not even when they have similar polarities. Besides their solubility properties, ionic liquids and deep eutectic solvents may be greener than organic solvents because ionic liquids are non-volatile and can be made from non-toxic components. This review covers selected examples of enzyme catalyzed reaction ionic liquids that demonstrate their advantages and unique properties and point out opportunities for new applications. Most examples involve hydrolases, but oxidoreductases and even whole cell reactions have been reported in ionic liquids.
Collapse
Affiliation(s)
- Johnathan Gorke
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Ave., Saint Paul, MN 55108, USA.,BioTechnology Institute, 240 Gortner Laboratory, University of Minnesota, 1479 Gortner Ave., Saint Paul, MN 55108, USA.,Department of Chemical Engineering and Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Ave. SE, Minneapolis, MN 55455, USA
| | - Friedrich Srienc
- BioTechnology Institute, 240 Gortner Laboratory, University of Minnesota, 1479 Gortner Ave., Saint Paul, MN 55108, USA.,Department of Chemical Engineering and Materials Science, University of Minnesota, 151 Amundson Hall, 421 Washington Ave. SE, Minneapolis, MN 55455, USA
| | - Romas Kazlauskas
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 140 Gortner Laboratory, 1479 Gortner Ave., Saint Paul, MN 55108, USA.,BioTechnology Institute, 240 Gortner Laboratory, University of Minnesota, 1479 Gortner Ave., Saint Paul, MN 55108, USA
| |
Collapse
|
31
|
Rogers TA, Bommarius AS. Utilizing Simple Biochemical Measurements to Predict Lifetime Output of Biocatalysts in Continuous Isothermal Processes. Chem Eng Sci 2010; 65:2118-2124. [PMID: 20885990 PMCID: PMC2946236 DOI: 10.1016/j.ces.2009.12.005] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The expected product yield of a biocatalyst during its useful lifetime is an important consideration when designing a continuous biocatalytic process. One important indicator of lifetime biocatalyst productivity is the dimensionless total turnover number (TTN). Here, a method is proposed for estimating the TTN of a given biocatalyst from readily-measured biochemical quantities, namely the specific activity and the deactivation half-life, measured under identical conditions. We demonstrate that this method may be applied to any enzyme whose thermal deactivation follows first-order kinetics, regardless of the number of unfolding intermediates, and that the TTN method circumvents the potential problems associated with measuring specific catalyst output when a portion of the enzyme is already unfolded. The TTN estimation was applied to several representative biocatalysts to demonstrate its applicability in identifying the most cost-effective catalyst from a pool of engineered mutants with similar activity and thermal stability.
Collapse
Affiliation(s)
- Thomas A Rogers
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363, USA
| | | |
Collapse
|
32
|
Thermal stability of bioactive enzymatic papers. Colloids Surf B Biointerfaces 2010; 75:239-46. [DOI: 10.1016/j.colsurfb.2009.08.042] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 08/25/2009] [Accepted: 08/26/2009] [Indexed: 11/18/2022]
|
33
|
Sol–gel encapsulation of acid phosphatase in the presence of the ionic liquid [BMIM][BF4]. MONATSHEFTE FUR CHEMIE 2009. [DOI: 10.1007/s00706-009-0230-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
34
|
Rogers TA, Daniel RM, Bommarius AS. Deactivation of TEM-1 β-Lactamase Investigated by Isothermal Batch and Non-Isothermal Continuous Enzyme Membrane Reactor Methods. ChemCatChem 2009; 1:131-137. [PMID: 22039393 PMCID: PMC3203640 DOI: 10.1002/cctc.200900120] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Indexed: 11/08/2022]
Abstract
The thermal deactivation of TEM-1 β-lactamase was examined using two experimental techniques: a series of isothermal batch assays and a single, continuous, non-isothermal assay in an enzyme membrane reactor (EMR). The isothermal batch-mode technique was coupled with the three-state "Equilibrium Model" of enzyme deactivation, while the results of the EMR experiment were fitted to a four-state "molten globule model". The two methods both led to the conclusions that the thermal deactivation of TEM-1 β-lactamase does not follow the Lumry-Eyring model and that the T(eq) of the enzyme (the point at which active and inactive states are present in equal amounts due to thermodynamic equilibrium) is at least 10 °C from the T(m) (melting temperature), contrary to the idea that the true temperature optimum of a biocatalyst is necessarily close to the melting temperature.
Collapse
Affiliation(s)
- Thomas A. Rogers
- School of Chemical and Biomolecular Engineering, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Drive NW, Atlanta, GA (USA) 30332-0323 (USA), Fax: (+ 1) 404-894-2291
| | - Roy M. Daniel
- Department of Biological Sciences, University of Waikato, Private Bag 3105, Hamilton, 3240 (New Zealand), Fax: (+ 64) 7-8384324
| | - Andreas S. Bommarius
- School of Chemical and Biomolecular Engineering, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, 315 Ferst Drive NW, Atlanta, GA (USA) 30332-0323 (USA), Fax: (+ 1) 404-894-2291
| |
Collapse
|
35
|
A strategy for immobilisation of carbon nanotubes homogenised in room temperature ionic liquids on carbon electrodes. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.04.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
36
|
Electrodeposition of chitosan–ionic liquid–glucose oxidase biocomposite onto nano-gold electrode for amperometric glucose sensing. Biosens Bioelectron 2009; 24:2898-903. [DOI: 10.1016/j.bios.2009.02.027] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 02/19/2009] [Accepted: 02/20/2009] [Indexed: 02/07/2023]
|
37
|
Leclercq L, Schmitzer AR. Supramolecular effects involving the incorporation of guest substrates in imidazolium ionic liquid networks: Recent advances and future developments. Supramol Chem 2009. [DOI: 10.1080/10610270802468421] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Loïc Leclercq
- a Department of Chemistry , Université de Montréal , Montréal, QC, Canada
| | | |
Collapse
|
38
|
Gao R, Shangguan X, Qiao G, Zheng J. Direct Electrochemistry of Hemoglobin and Its Electrocatalysis Based on Hyaluronic Acid and Room Temperature Ionic Liquid. ELECTROANAL 2008. [DOI: 10.1002/elan.200804353] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
39
|
Long JS, Silvester DS, Wildgoose GG, Surkus AE, Flechsig GU, Compton RG. Direct electrochemistry of horseradish peroxidase immobilized in a chitosan–[C4mim][BF4] film: Determination of electrode kinetic parameters. Bioelectrochemistry 2008; 74:183-7. [DOI: 10.1016/j.bioelechem.2008.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2008] [Revised: 07/25/2008] [Accepted: 07/31/2008] [Indexed: 10/21/2022]
|
40
|
Domínguez de María P. "Nonsolvent" applications of ionic liquids in biotransformations and organocatalysis. Angew Chem Int Ed Engl 2008; 47:6960-8. [PMID: 18651677 DOI: 10.1002/anie.200703305] [Citation(s) in RCA: 161] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The application of room-temperature ionic liquids (RTILs) as (co)solvents and/or reagents is well documented. However, RTILS also have "nonsolvent" applications in biotransformations and organocatalysis. Examples are the anchoring of substrates to RTILs; ionic-liquid-coated enzymes (ILCE) and enzyme-IL colyophilization; the construction of biocatalytic ternary reaction systems; the combination of enzymes, RTILs, membranes, and (bio)electrochemistry; and ionic-liquid-supported organocatalysts. These strategies provide more robust, more efficient, and more enantioselective bio- and organocatalysts with many practical applications. As shown herein, RTILs offer a wide range of promising alternatives to conventional chemistry.
Collapse
Affiliation(s)
- Pablo Domínguez de María
- AkzoNobel BV, Chemicals Process and Product Technology Department, Velperweg 76, P.O. Box 9300, 6800 SB Arnhem, The Netherlands.
| |
Collapse
|
41
|
Domínguez de María P. “Nonsolvens”-Anwendungen von ionischen Flüssigkeiten bei Biotransformationen und in der Organokatalyse. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200703305] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
42
|
Zhang Y, Zheng J. Direct electrochemistry and electrocatalysis of myoglobin immobilized in hyaluronic acid and room temperature ionic liquids composite film. Electrochem commun 2008. [DOI: 10.1016/j.elecom.2008.07.022] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
43
|
Yu J, Zhao T, Zhao F, Zeng B. Direct electron transfer of hemoglobin immobilized in a mesocellular siliceous foams supported room temperature ionic liquid matrix and the electrocatalytic reduction of H2O2. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.03.059] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
44
|
Hoyer H, Schlocker W, Krum K, Bernkop-Schnürch A. Preparation and evaluation of microparticles from thiolated polymers via air jet milling. Eur J Pharm Biopharm 2008; 69:476-85. [DOI: 10.1016/j.ejpb.2008.01.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2007] [Revised: 12/29/2007] [Accepted: 01/14/2008] [Indexed: 11/29/2022]
|
45
|
Effects of mutations in the helix G region of horseradish peroxidase. Biochimie 2008; 90:1414-21. [PMID: 18554516 DOI: 10.1016/j.biochi.2008.05.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2008] [Accepted: 05/15/2008] [Indexed: 11/20/2022]
Abstract
Horseradish peroxidase (HRP) has long attracted intense research interest and is used in many biotechnological fields, including diagnostics, biosensors and biocatalysis. Enhancement of HRP catalytic activity and/or stability would further increase its usefulness. Based on prior art, we substituted solvent-exposed lysine and glutamic acid residues near the proximal helix G (Lys 232, 241; Glu 238, 239) and between helices F and F' (Lys 174). Three single mutants (K232N, K232F, K241N) demonstrated increased stabilities against heat (up to 2-fold) and solvents (up to 4-fold). Stability gains are likely due to improved hydrogen bonding and space-fill characteristics introduced by the relevant substitution. Two double mutants showed stability gains but most double mutations were non-additive and non-synergistic. Substitutions of Lys 174 or Glu 238 were destabilising. Unexpectedly, notable alterations in steady-state Vm/E values occurred with reducing substrate ABTS (2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)), despite the distance of the mutated positions from the active site.
Collapse
|
46
|
Characterisation and application of carbon film electrodes in room temperature ionic liquid media. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2007.12.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
47
|
Pauliukaite R, Doherty A, Murnaghan K, Brett C. Application of Some Room Temperature Ionic Liquids in the Development of Biosensors at Carbon Film Electrodes. ELECTROANAL 2008. [DOI: 10.1002/elan.200704081] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
48
|
PINTO PCAG, SARAIVA MLMFS, LIMA JLFC. Oxidoreductase Behavior in Ionic Liquids: a Review. ANAL SCI 2008; 24:1231-8. [DOI: 10.2116/analsci.24.1231] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Paula C. A. G. PINTO
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto
| | | | - José L. F. C. LIMA
- REQUIMTE, Serviço de Química-Física, Faculdade de Farmácia, Universidade do Porto
| |
Collapse
|
49
|
On the background of enhanced stability and reusability of enzymes in ionic liquids. Biochem Soc Trans 2007; 35:1624-7. [DOI: 10.1042/bst0351624] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The ability of ILs (ionic liquids) to provide an environment of increased stability and, in this way, improve the recyclability of enzymes has been studied. The description of this phenomenon is not easy; there are several approaches for explanation. In this mini-review, the results from different research groups are summarized, with the aim of explaining the strong stability effect of ILs on several enzymes. Spectroscopic methods (e.g. fluorescence and CD, IR spectroscopy, mass spectroscopy and NMR) and investigations of polarity and kosmotropicity of ions are promising methods. Since higher stability means that we may be able to reuse enzymes more times, the recyclability of enzymes was also in the focus. From this point of view, the advantages and disadvantages of applying monophasic or biphasic systems are discussed too, presenting the coupled techniques as well.
Collapse
|
50
|
Strong substrate-stabilizing effect of a water-miscible ionic liquid [BMIM][BF4] in the catalysis of horseradish peroxidase. Biotechnol Lett 2007; 30:529-33. [DOI: 10.1007/s10529-007-9570-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Revised: 10/04/2007] [Accepted: 10/08/2007] [Indexed: 10/22/2022]
|