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Bohr SSR, Thorlaksen C, Kühnel RM, Günther-Pomorski T, Hatzakis NS. Label-Free Fluorescence Quantification of Hydrolytic Enzyme Activity on Native Substrates Reveals How Lipase Function Depends on Membrane Curvature. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:6473-6481. [PMID: 32437165 DOI: 10.1021/acs.langmuir.0c00787] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Lipases are important hydrolytic enzymes used in a spectrum of technological applications, such as the pharmaceutical and detergent industries. Because of their versatile nature and ability to accept a broad range of substrates, they have been extensively used for biotechnological and industrial applications. Current assays to measure lipase activity primarily rely on low-sensitivity measurements of pH variations or visible changes of material properties, like hydration, and often require high amounts of proteins. Fluorescent readouts, on the other hand, offer high contrast and even single-molecule sensitivity, albeit they are reliant on fluorogenic substrates that structurally resemble the native ones. Here we present a method that combines the highly sensitive readout of fluorescent techniques while reporting enzymatic lipase function on native substrates. The method relies on embedding the environmentally sensitive fluorescent dye pHrodo and native substrates into the bilayer of liposomes. The charged products of the enzymatic hydrolysis alter the local membrane environment and thus the fluorescence intensity of pHrodo. The fluorescence can be accurately quantified and directly assigned to product formation and thus enzymatic activity. We illustrated the capacity of the assay to report the function of diverse lipases and phospholipases both in a microplate setup and at the single-particle level on individual nanoscale liposomes using total internal reflection fluorescence (TIRF). The parallelized sensitive readout of microscopy combined with the inherent polydispersity in sizes of liposomes allowed us to screen the effect of membrane curvature on lipase function and identify how mutations in the lid region control the membrane curvature-dependent activity. We anticipate this methodology to be applicable for sensitive activity readouts for a spectrum of enzymes where the product of the enzymatic reaction is charged.
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Affiliation(s)
- Søren S-R Bohr
- Department of Chemistry & Nanoscience Center, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
- Novo Nordisk Center for Protein Research (CPR), University of Copenhagen, Blegdamsvej 3B, Copenhagen 2200, Denmark
| | - Camilla Thorlaksen
- Department of Chemistry & Nanoscience Center, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
- Novo Nordisk Center for Protein Research (CPR), University of Copenhagen, Blegdamsvej 3B, Copenhagen 2200, Denmark
- Biophysics, Novo Nordisk A/S, Novo Nordisk Park 1, Maaloev 2760, Denmark
- Drug Delivery and Biophysics of Biopharmaceuticals, Department of Pharmacy, University of Copenhagen, Universitetsparken 2, Copenhagen 2100, Denmark
| | - Ronja Marie Kühnel
- Faculty of Chemistry and Biochemistry, Department of Molecular Biochemistry, Ruhr University Bochum, Universitätstrasse 150, D-44780 Bochum, Germany
| | - Thomas Günther-Pomorski
- Faculty of Chemistry and Biochemistry, Department of Molecular Biochemistry, Ruhr University Bochum, Universitätstrasse 150, D-44780 Bochum, Germany
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Nikos S Hatzakis
- Department of Chemistry & Nanoscience Center, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
- Novo Nordisk Center for Protein Research (CPR), University of Copenhagen, Blegdamsvej 3B, Copenhagen 2200, Denmark
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Abstract
Carbohydrate esterases are a group of enzymes which release acyl or alkyl groups attached by ester linkage to carbohydrates. The CAZy database, which classifies enzymes that assemble, modify, and break down carbohydrates and glycoconjugates, classifies all carbohydrate esterases into 16 families. This chapter is an overview of the research for nearly 50 years around the main groups of carbohydrate esterases dealing with the degradation of polysaccharides, their main biochemical and molecular traits, as well as its application for the synthesis of high added value esters.
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Ramnath L, Sithole B, Govinden R. Classification of lipolytic enzymes and their biotechnological applications in the pulping industry. Can J Microbiol 2017; 63:179-192. [DOI: 10.1139/cjm-2016-0447] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the pulp and paper industry, during the manufacturing process, the agglomeration of pitch particles (composed of triglycerides, fatty acids, and esters) leads to the formation of black pitch deposits in the pulp and on machinery, which impacts on the process and pulp quality. Traditional methods of pitch prevention and treatment are no longer feasible due to environmental impact and cost. Consequently, there is a need for more efficient and environmentally friendly approaches. The application of lipolytic enzymes, such as lipases and esterases, could be the sustainable solution to this problem. Therefore, an understanding of their structure, mechanism, and sources are essential. In this report, we review the microbial sources for the different groups of lipolytic enzymes, the differences between lipases and esterases, and their potential applications in the pulping industry.
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Affiliation(s)
- L. Ramnath
- Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Westville Campus, P/Bag X54001, Durban 4000, South Africa
| | - B. Sithole
- Forestry and Forest Products Research Centre, Council for Scientific and Industrial Research, Durban 4000, South Africa
- Discipline of Chemical Engineering, University of KwaZulu-Natal, Durban 4000, South Africa
| | - R. Govinden
- Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Westville Campus, P/Bag X54001, Durban 4000, South Africa
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Bavishi K, Hatzakis NS. Shedding light on protein folding, structural and functional dynamics by single molecule studies. Molecules 2014; 19:19407-34. [PMID: 25429564 PMCID: PMC6272019 DOI: 10.3390/molecules191219407] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 11/07/2014] [Accepted: 11/12/2014] [Indexed: 11/16/2022] Open
Abstract
The advent of advanced single molecule measurements unveiled a great wealth of dynamic information revolutionizing our understanding of protein dynamics and behavior in ways unattainable by conventional bulk assays. Equipped with the ability to record distribution of behaviors rather than the mean property of a population, single molecule measurements offer observation and quantification of the abundance, lifetime and function of multiple protein states. They also permit the direct observation of the transient and rarely populated intermediates in the energy landscape that are typically averaged out in non-synchronized ensemble measurements. Single molecule studies have thus provided novel insights about how the dynamic sampling of the free energy landscape dictates all aspects of protein behavior; from its folding to function. Here we will survey some of the state of the art contributions in deciphering mechanisms that underlie protein folding, structural and functional dynamics by single molecule fluorescence microscopy techniques. We will discuss a few selected examples highlighting the power of the emerging techniques and finally discuss the future improvements and directions.
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Affiliation(s)
- Krutika Bavishi
- Plant Biochemistry Laboratory, Department of Plant and Environmental Sciences, Center for Synthetic Biology "bioSYNergy", Villum Research Center "Plant Plasticity", University of Copenhagen, Thorvaldsenvej 40, DK-1871 Frederiksberg C, Denmark.
| | - Nikos S Hatzakis
- Bio-Nanotechnology Laboratory, Department of Chemistry, Nano-Science Center, Lundbeck Foundation Center Biomembranes in Nanomedicine, University of Copenhagen, 2100 Copenhagen, Denmark.
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5
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Hatzakis NS. Single molecule insights on conformational selection and induced fit mechanism. Biophys Chem 2014; 186:46-54. [DOI: 10.1016/j.bpc.2013.11.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 11/01/2013] [Accepted: 11/01/2013] [Indexed: 01/24/2023]
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JØRGENSEN SUNEK, HATZAKIS NIKOSS. INSIGHTS IN ENZYME FUNCTIONAL DYNAMICS AND ACTIVITY REGULATION BY SINGLE MOLECULE STUDIES. ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793048013300028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The advent of advanced single molecule measurements heralded the arrival of a wealth of dynamic information revolutionizing our understanding of protein dynamics and behavior in ways not deducible by conventional bulk assays. They offered the direct observation and quantification of the abundance and life time of multiple states and transient intermediates in the energy landscape that are typically averaged out in non-synchronized ensemble measurements, thus providing unprecedented insights into complex biological processes. Here we survey the current state of the art in single-molecule fluorescence microscopy methodology for studying the mechanism of enzymatic activity and the insights on protein functional dynamics. We will initially discuss the strategies employed to date, their limitations and possible ways to overcome them, and finally how single enzyme kinetics can advance our understanding on mechanisms underlying function and regulation of proteins. [Formula: see text]Special Issue Comment: This review focuses on functional dynamics of individual enzymes and is related to the review on ion channels by Lu,44 the reviews on mathematical treatment of Flomenbom45 and Sach et al.,46 and review on FRET by Ruedas-Rama et al.41
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Affiliation(s)
- SUNE K. JØRGENSEN
- Bio-Nanotechnology Laboratory, Department of Chemistry, Nano-Science Center, Lundbeck Foundation Center, Biomembranes in Nanomedicine University of Copenhagen, 2100 Copenhagen, Denmark
| | - NIKOS S. HATZAKIS
- Bio-Nanotechnology Laboratory, Department of Chemistry, Nano-Science Center, Lundbeck Foundation Center, Biomembranes in Nanomedicine University of Copenhagen, 2100 Copenhagen, Denmark
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7
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Rashamuse K, Ronneburg T, Sanyika W, Mathiba K, Mmutlane E, Brady D. Metagenomic mining of feruloyl esterases from termite enteric flora. Appl Microbiol Biotechnol 2013; 98:727-37. [DOI: 10.1007/s00253-013-4909-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 03/20/2013] [Accepted: 04/07/2013] [Indexed: 10/26/2022]
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8
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Rashamuse K, Sanyika W, Ronneburg T, Brady D. A feruloyl esterase derived from a leachate metagenome library. BMB Rep 2012; 45:14-9. [DOI: 10.5483/bmbrep.2012.45.1.14] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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The interplay of descriptor-based computational analysis with pharmacophore modeling builds the basis for a novel classification scheme for feruloyl esterases. Biotechnol Adv 2011; 29:94-110. [DOI: 10.1016/j.biotechadv.2010.09.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2010] [Revised: 08/27/2010] [Accepted: 09/06/2010] [Indexed: 11/18/2022]
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10
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Mohapatra DP, Brar SK, Tyagi RD, Surampalli RY. Physico-chemical pre-treatment and biotransformation of wastewater and wastewater sludge--fate of bisphenol A. CHEMOSPHERE 2010; 78:923-41. [PMID: 20083294 DOI: 10.1016/j.chemosphere.2009.12.053] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2009] [Revised: 12/17/2009] [Accepted: 12/18/2009] [Indexed: 05/22/2023]
Abstract
Bisphenol A (BPA), an endocrine disrupting compound largely used in plastic and paper industry, ends up in aquatic systems via wastewater treatment plants (WWTPs) among other sources. The identification and quantification of BPA in wastewater (WW) and wastewater sludge (WWS) is of major interest to assess the endocrine activity of treated effluent discharged into the environment. Many treatment technologies, including various pre-treatment methods, such as hydrolysis, Fenton oxidation, peroxidation, ultrasonication and ozonation have been developed in order to degrade BPA in WW and WWS and for the production of WWS based value-added products (VAPs). WWS based VAPs, such as biopesticides, bioherbicides, biofertilizers, bioplastics and enzymes are low cost biological alternatives that can compete with chemicals or other cost intensive biological products in the current markets. However, this field application is disputable due to the presence of these organic compounds which has been discussed with a perspective of simultaneous degradation. The pre-treatment produces an impact on rheology as well as value-addition which has been reviewed in this paper. Various analytical techniques available for the detection of BPA in WW and WWS are also discussed. Presence of heavy metals and possible thermodynamical behavior of the compound in WW and WWS can have major impact on BPA removal, which is also included in the review.
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Affiliation(s)
- D P Mohapatra
- INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, Canada G1K 9A9
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11
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Weadge JT, Weadge JT, Clarke AJ. Transacetylation of carbohydrates in organic solvent catalysed byO-acetylpeptidoglycan esterase fromNeisseria gonorrhoeae. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420701801307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Barnabé S, Brar SK, Tyagi RD, Beauchesne I, Surampalli RY. Pre-treatment and bioconversion of wastewater sludge to value-added products--fate of endocrine disrupting compounds. THE SCIENCE OF THE TOTAL ENVIRONMENT 2009; 407:1471-88. [PMID: 19110297 DOI: 10.1016/j.scitotenv.2008.11.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2008] [Revised: 10/25/2008] [Accepted: 11/09/2008] [Indexed: 05/05/2023]
Abstract
Development of processes for the production of value added products (VAPs), such as biopesticides, microbial inoculants or industrial enzymes through biotransformation of raw or pre-treated wastewater sludge (WWS) has undergone a substantial progress over the last decade. WWS based VAPs are low cost biological alternatives that can compete with chemicals or other cost intensive biological products in the current markets. However, when WWS is used as a raw material for VAPs production, questions still remains on the persistence of organic pollutants within the biotransformed WWS, especially, endocrine disrupting compounds (EDCs) and the production of their toxic intermediates. WWS pre-treatment prior to biotransformation as well as the microbial strains used for biotransformation can possibly remove these organic pollutants. The literature findings concerning the impact of WWS pre-treatment and value added products on EDCs removal are reviewed in this paper. The microbial potential to degrade or detoxify EDCs and toxic intermediates concomitant with value-addition is also discussed. The concept of obtaining EDCs free-WWS based VAPs and simultaneously achieving the objective of pollution control is presented.
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Affiliation(s)
- S Barnabé
- Institut National de la Recherche Scientifique, Université du Québec, 490 rue de la Couronne, Québec, Québec, Canada G1K 9A9
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13
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Rashamuse KJ, Burton SG, Cowan DA. A novel recombinant ethyl ferulate esterase from Burkholderia multivorans. J Appl Microbiol 2008; 103:1610-20. [PMID: 17953572 DOI: 10.1111/j.1365-2672.2007.03394.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS Isolation and identification of bacterial isolates with specific ferulic acid (FA) esterase activity and cloning of a gene encoding activity. METHODS AND RESULTS A micro-organism with ethyl ferulate hydrolysing (EFH) activity was isolated by culture enrichment techniques. Detailed molecular identification based on species-specific primers and two conserved genes (16S rRNA and recA) led to the identification of the isolate as Burkholderia multivorans UWC10. A gene (designated estEFH5) encoding an EFH enzyme was cloned and its nucleotide sequence determined. Translational analysis revealed that estEFH5 encoded a polypeptide of 326 amino acids with an estimated molecular weight of 34.83 kDa. The EstEFH5 primary structure showed a typical serine hydrolase motif (G-H-S-L-G). The estEFH5 gene was over-expressed in Escherichia coli in an insoluble form. Following urea denaturation and in vitro refolding, the enzyme was purified using one-step His Select Nickel chromatographic column. CONCLUSION Purified EstEFH5 showed a preference for short-chain rho-nitrophenyl esters (C2 and C3) a typical feature for carboxylesterase. Furthermore, the recombinant enzyme also retained the activity against ethyl ferulate (EF). SIGNIFICANCE AND IMPACT OF THE STUDY A biocatalytic process for the production of FA from EF as a model substrate was demonstrated. This is the first report that describes the cloning and expression of a gene encoding FA esterase activity from the genus Burkholderia.
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Affiliation(s)
- K J Rashamuse
- CSIR Biosciences, Modderfontein, Johannesburg, South Africa
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14
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Fazary AE, Ju YH. Feruloyl esterases as biotechnological tools: current and future perspectives. Acta Biochim Biophys Sin (Shanghai) 2007; 39:811-28. [PMID: 17989872 DOI: 10.1111/j.1745-7270.2007.00348.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Feruloyl esterases represent a diverse group of hydrolases catalyzing the cleavage and formation of ester bonds between plant cell wall polysaccharide and phenolic acid. They are widely distributed in plants and microorganisms. Besides lipases, a considerable number of microbial feruloyl esterases have also been discovered and overexpressed. This review summarizes the latest research on their classification, production, and biophysicochemical properties. Special emphasis is given to the importance of that type of enzyme and their related phenolic ferulic acid compound in biotechnological processes, and industrial and medicinal applications.
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Affiliation(s)
- Ahmed E Fazary
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106-07, Taiwan, China
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15
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Lee GS, Widjaja A, Ju YH. Enzymatic synthesis of cinnamic acid derivatives. Biotechnol Lett 2006; 28:581-5. [PMID: 16614896 DOI: 10.1007/s10529-006-0019-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2005] [Accepted: 01/18/2006] [Indexed: 11/26/2022]
Abstract
Using Novozym 435 as catalyst, the syntheses of ethyl ferulate (EF) from ferulic acid (4-hydroxy 3-methoxy cinnamic acid) and ethanol, and octyl methoxycinnamate (OMC) from p-methoxycinnamic acid and 2-ethyl hexanol were successfully carried out in this study. A conversion of 87% was obtained within 2 days at 75 degrees C for the synthesis of EF. For the synthesis of OMC at 80 degrees C, 90% conversion can be obtained within 1 day. The use of solvent and high reaction temperature resulted in better conversion for the synthesis of cinnamic acid derivatives. Some cinnamic acid esters could also be obtained with higher conversion and shorter reaction times in comparison to other methods reported in the literature. The enzyme can be reused several times before significant activity loss was observed.
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Affiliation(s)
- Gia-Sheu Lee
- Department of Chemical Engineering, National Taiwan University of Science and Technology, 43 Keelung Road, Section 4, Taipei 106-07, Taiwan
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Tsuchiyama M, Sakamoto T, Fujita T, Murata S, Kawasaki H. Esterification of ferulic acid with polyols using a ferulic acid esterase from Aspergillus niger. Biochim Biophys Acta Gen Subj 2006; 1760:1071-9. [PMID: 16714088 DOI: 10.1016/j.bbagen.2006.03.022] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2006] [Revised: 03/10/2006] [Accepted: 03/30/2006] [Indexed: 11/22/2022]
Abstract
Commercially available enzyme preparations were screened for enzymes that have a high ability to catalyze direct ester-synthesis of ferulic acid with glycerol. Only a preparation, Pectinase PL "Amano" produced by Aspergillus niger, feruloylated glycerol under the experimental conditions. The enzyme responsible for the esterification was purified and characterized. This enzyme, called FAE-PL, was found to be quite similar to an A. niger ferulic acid esterase (FAE-III) in terms of molecular mass, pH and temperature optima, substrate specificity on synthetic substrates, and the N-terminal amino acid sequence. FAE-PL highly catalyzed direct esterification of ferulic acid and sinapinic acid with glycerol. FAE-PL could feruloylate monomeric sugars including arabinose, fructose, galactose, glucose, and xylose. We determined the suitable conditions for direct esterification of ferulic acid with glycerol to be as follows: 1% ferulic acid in the presence of 85% glycerol and 5% dimethyl sulfoxide at pH 4.0 and 50 degrees C. Under these conditions, 81% of ferulic acid could be converted to 1-glyceryl ferulate, which was identified by (1)H-NMR. The ability of 1-glyceryl ferulate to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals was higher than that of the anti-oxidant butyl hydroxytoluene.
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Affiliation(s)
- Moriyasu Tsuchiyama
- Department of Research and Development, Okumoto Flour Milling Co. Ltd., Osaka 550-0015, Japan
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Hatzakis NS, Smonou I. Asymmetric transesterification of secondary alcohols catalyzed by feruloyl esterase from Humicola insolens. Bioorg Chem 2005; 33:325-37. [PMID: 15970306 DOI: 10.1016/j.bioorg.2005.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2005] [Revised: 04/14/2005] [Accepted: 05/01/2005] [Indexed: 11/23/2022]
Abstract
A new asymmetric transesterification of secondary alcohols catalyzed by feruloyl esterase from Humicola insolens has been found. Although alcohols are not the natural substrates for this enzyme, a high R enantioselectivity was observed. Stereochemical studies showed that variations in substrate structure lead to strong variations in enantioselectivity. The highest enantioselectivities are obtained when the beta-carbon of the secondary alcohol is tertiary or quaternary.
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Affiliation(s)
- Nikos S Hatzakis
- Department of Chemistry, University of Crete, Iraklion 71409, Crete, Greece
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Kishimoto N, Kakino Y, Iwai K, Fujita T. Chlorogenate hydrolase-catalyzed synthesis of hydroxycinnamic acid ester derivatives by transesterification, substitution of bromine, and condensation reactions. Appl Microbiol Biotechnol 2005; 68:198-202. [PMID: 15717173 DOI: 10.1007/s00253-004-1876-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2004] [Revised: 11/21/2004] [Accepted: 12/03/2004] [Indexed: 11/24/2022]
Abstract
A chlorogenate hydrolase (EC 3.1.1.42) synthesized 2-phenylethyl caffeate (2-CAPE) from 5-chlorogenic acid (5-CQA) and 2-phenylethyl alcohol (2-PA) (by transesterification), from 5-CQA and 2-phenylethyl bromide (2-PBr) (by substitution of bromine), and from caffeic acid (CA) and 2-PA or 2-PBr (by condensation) as well as hydrolysis of 5-CQA. Some reaction conditions including pH, temperature, substrate and solvent concentrates, and reaction time were optimized for the production of 2-CAPE. A maximal molar yield of 50% was achieved by transesterification, 4.7% by substitution of bromine, and 13% by condensation. Among the parameters studied for optimization, the pH of the buffer solution and concentration of 2-PA or 2-PBr affected the production of 2-CAPE. The optimum pH for the hydrolysis reaction was within the neutral range (pH 6.5), whereas the residual three reactions were only catalyzed within the acidic range (pH 3.0-4.0). The optimum concentrations of 2-PA and 2-PBr for three reactions were 5-70 vol% and no 2-CAPE was produced in the 2-PA or 2-PBr solutions containing powdered enzyme. The enzyme may bind to the caffeoyl moiety of 5-CQA or CA to form an enzyme-substrate complex. It then catalyzes four different reactions corresponding to the reaction conditions.
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Affiliation(s)
- N Kishimoto
- Graduate School of Applied Life Chemistry, Kinki University, Nara-City, Nara 631-8505, Japan.
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Panda T, Gowrishankar BS. Production and applications of esterases. Appl Microbiol Biotechnol 2005; 67:160-9. [PMID: 15630579 DOI: 10.1007/s00253-004-1840-y] [Citation(s) in RCA: 191] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Revised: 11/10/2004] [Accepted: 11/11/2004] [Indexed: 10/26/2022]
Abstract
Esterase plays a major role in the degradation of natural materials and industrial pollutants, viz., cereal wastes, plastics, and other toxic chemicals. It is useful in the synthesis of optically pure compounds, perfumes, and antioxidants. The potential applications of esterase with reference to agriculture, food, and pharmaceutical industries, are discussed in this review. Promising applications in this avenue can be supported by appropriate production strategies.
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Affiliation(s)
- T Panda
- Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai, 600036, India.
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20
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Hatzakis NS, Smonou I. Enantioselectivity and diastereoselectivity in the transesterification of secondary alcohols mediated by feruloyl esterase from Humicola insolens. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.02.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Biely P, Wong KKY, Suckling ID, Spániková S. Transacetylations to carbohydrates catalyzed by acetylxylan esterase in the presence of organic solvent. Biochim Biophys Acta Gen Subj 2003; 1623:62-71. [PMID: 14572903 DOI: 10.1016/s0304-4165(03)00154-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Various conditions were applied to test the ability of acetylxylan esterase (AcXE) from Schizophyllum commune to catalyze acetyl group transfer to methyl beta-D-xylopyranoside (Me-beta-Xylp) and other carbohydrates. The best performance of the enzyme was observed in an n-hexane-vinyl acetate-sodium dioctylsulfosuccinate (DOSS)-water microemulsion at a molar water-detergent ratio (w(0)) of about 4-5. Although the enzyme was found to have a half-life of about 1 h in the system, more than 60% conversion of Me-beta-Xylp to acetylated derivatives was achieved. Under identical reaction conditions, the enzyme acetylated other carbohydrates such as methyl beta-D-cellobioside (Me-beta-Cel), cellotetraose, methyl beta-D-glucopyranoside (Me-beta-Glcp), 2-deoxy-D-glucose, D-mannose, beta-1,4-mannobiose, -mannopentaose, -mannohexaose, beta-1,4-xylobiose and -xylopentaose. This work is the first example of reverse reactions by an acetylxylan esterase and a carbohydrate esterase belonging to family 1.
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Affiliation(s)
- Peter Biely
- PAPRO Forest Research, Sala Street, Private Bag 3020, Rotorua, New Zealand.
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