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Yin Y, Kong X, Li M, Wang J, Dai X, Zhang Y, Lin W. Development of an esterase fluorescent probe based on naphthalimide-benzothiazole conjugation and its applications for qualitative detection of esterase in orlistat-treated biosamples. Anal Chim Acta 2022; 1190:339248. [PMID: 34857133 DOI: 10.1016/j.aca.2021.339248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/31/2021] [Accepted: 11/01/2021] [Indexed: 11/17/2022]
Abstract
Esterase is a large hydrolysis family, and widely distributed in many kinds of cells. It is responsible for multiple physiological and pathological functions including metabolism, gene expression. While abnormality of esterase is associated with many pathological activities in obesity, Wolman's disease, and cancer. Thereby, it is essential to design an effective tool for esterase in situ detection in biological systems. Herein, a novel fluorescent probe Y-1 for monitoring esterase in living cells was rationally designed. Probe Y-1 was synthesized by the conjugation between an acetylation of 4-hydroxy naphthalimide and benzothiazole group. Benzothiazole moiety is a typical Excited-state intramolecular proton transfer (ESIPT) controller. Acetate group was selected as the responsive site and ESIPT initiator. As the acetate group could block the ESIPT effect, the probe emits no fluorescence under the excitation of 455 nm. When binding with esterase, Y-1 shows distinct fluorescence with the peak at 560 nm with short time when ESIPT is on. Y-1 displays high sensitivity (LOD is 0.216 × 10-3 U/mL), fast response (within 5 min), high selectivity and photostability towards esterase. Furthermore, the %RSD (relative standard deviation) of within-day and day-to-day precision was no more than 13.0% and the accuracy ranged from -6.5 to -12.3%. Kinetics performance of Y-1 indicates that esterase has high affinity and hydrolysis to Y-1. For biological applications, our probe is a time-dependent visualizing esterase in living HepG2 and CoLo205 cells within 15 min. After the treatment of orlistat (1 and 5 μM) for inhibiting the activity of esterase, the bright fluorescence has also been detected using our probe. Furthermore, it has been successful in monitoring the esterase in zebrafish, the data were consistent with cellular phenomena. Therefore, all these findings indicate that the robust probe Y-1 is a useful qualitative tool for detecting esterase in biological systems.
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Affiliation(s)
- Yaguang Yin
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Xiuqi Kong
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Min Li
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Jingchao Wang
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Xiaoyu Dai
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Yunyan Zhang
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China
| | - Weiying Lin
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, Shandong, 250022, PR China; Guangxi Key Laboratory of Electrochemical Energy Materials, Institute of Optical Materials and Chemical Biology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, Guangxi, 530004, PR China.
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2
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Optimization of Spectrophotometric and Fluorometric Assays Using Alternative Substrates for the High-Throughput Screening of Lipase Activity. J CHEM-NY 2021. [DOI: 10.1155/2021/3688124] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The effects of reaction conditions on the spectrophotometric and fluorometric assays using alternative substrates (p-nitrophenyl palmitate and 4-methylumbelliferyl oleate) were investigated to optimize them for the high-throughput screening of lipase activity from agricultural products. Four model lipases from Chromobacterium viscosum, Pseudomonas fluorescens, Sus scrofa pancreas, and wheat germ (Triticum aestivum) were allowed to hydrolyze the alternative substrates at different substrate concentrations (1–5 mM), operating pH (5.0–8.0), and operating temperatures (25–55°C). The results show that both the spectrophotometric and fluorometric assays worked well at the standard reaction conditions (pH 7.0 and 30°C) for finding a typical lipase, although pH conditions should be considered to detect the catalytic activity of lipases, which are applicable to more acidic or alkaline pH circumstances. To validate the optimized conditions, the high-throughput screening of lipase activity was conducted using 17 domestic agricultural products. A pileus of Pleurotus eryngii showed the highest activity in both the spectrophotometric (633.42 μU/mg) and fluorometric (101.77 μU/mg) assays. The results of this research provide practical information for the high-throughput screening of lipases using alternative substrates on microplates.
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Gherbovet O, Ferreira F, Clément A, Ragon M, Durand J, Bozonnet S, O'Donohue MJ, Fauré R. Regioselective chemoenzymatic syntheses of ferulate conjugates as chromogenic substrates for feruloyl esterases. Beilstein J Org Chem 2021; 17:325-333. [PMID: 33828614 PMCID: PMC7871029 DOI: 10.3762/bjoc.17.30] [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: 09/15/2020] [Accepted: 01/15/2021] [Indexed: 11/30/2022] Open
Abstract
Generally, carbohydrate-active enzymes are studied using chromogenic substrates that provide quick and easy color-based detection of enzyme-mediated hydrolysis. For feruloyl esterases, commercially available chromogenic ferulate derivatives are both costly and limited in terms of their experimental application. In this study, we describe solutions for these two issues, using a chemoenzymatic approach to synthesize different ferulate compounds. The overall synthetic routes towards commercially available 5-bromo-4-chloro-3-indolyl and 4-nitrophenyl 5-O-feruloyl-α-ʟ-arabinofuranosides were significantly shortened (from 7 or 8 to 4–6 steps), and the transesterification yields were enhanced (from 46 to 73% and from 47 to 86%, respectively). This was achieved using enzymatic (immobilized Lipozyme® TL IM from Thermomyces lanuginosus) transesterification of unprotected vinyl ferulate to the primary hydroxy group of α‐ʟ‐arabinofuranosides. Moreover, a novel feruloylated 4-nitrocatechol-1-yl-substituted butanetriol analog, containing a cleavable hydroxylated linker, was also synthesized in 32% overall yield in 3 steps (convergent synthesis). The latter route combined the regioselective functionalization of 4-nitrocatechol and enzymatic transferuloylation. The use of this strategy to characterize type A feruloyl esterase from Aspergillus niger reveals the advantages of this substrate for the characterizations of feruloyl esterases.
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Affiliation(s)
- Olga Gherbovet
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Fernando Ferreira
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Apolline Clément
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Mélanie Ragon
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Julien Durand
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Sophie Bozonnet
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Michael J O'Donohue
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Régis Fauré
- Toulouse Biotechnology Institute, Bio & Chemical Engineering (TBI), Université de Toulouse, CNRS 5504, INRAE 792, INSA de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
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High-Throughput, Fluorescence-Based Esterase Activity Assay for Assessing Polysorbate Degradation Risk during Biopharmaceutical Development. Pharm Res 2021; 38:397-413. [PMID: 33655394 DOI: 10.1007/s11095-021-03011-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/04/2021] [Indexed: 10/22/2022]
Abstract
PURPOSE Hydrolytic degradation of polysorbate during 2-8°C storage of monoclonal antibody drug products has been attributed to residual enzymes (e.g., esterases) from bioprocessing steps. Robust detection of esterase activity using sensitive, non-polysorbate surrogate substrates can provide an alternate method to assess polysorbate degradation risk, if the correlation between the esterase activity and polysorbate degradation is established. METHODS A general esterase activity assay was developed as a monitoring and characterization tool during bioprocess development of monoclonal antibodies. RESULTS We report a fluorescence plate-based assay for quantifying esterase activity, utilizing 4-methylumbelliferyl caprylate (MU-C8) as the esterase substrate. The assay was first assessed for substrate, inhibitor and pH specificity using both model enzymes and purified protein samples. The assay was then extensively tested to understand sample matrix effects on activity rates. CONCLUSIONS The use of this high-throughput method will allow for rapid characterization of protein samples in under three hours. The esterase activity correlated directly with polysorbate degradation and can provide valuable information on polysorbate degradation risk throughout drug development.
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Larsen KL, Andersen RJ, Brask J. Synthesis of substrates for periodate-coupled assay of phospholipases C and sphingomyelinases. Enzyme Microb Technol 2016; 91:66-71. [PMID: 27444331 DOI: 10.1016/j.enzmictec.2016.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 11/16/2022]
Abstract
A series of 4-nitrophenyl (pNP) and 4-methylumbelliferyl (4MU) substrate analogues of phosphatidyl choline (PC) and phosphatidic acid (PA) were synthesized from 4-bromo-1-butene by ether formation, olefin epoxidation and ring opening with the phosphate head group. The pNP PC analogue, 4-(4-nitrophenoxy)-2-hydroxy-butyl-1-phosphoryl choline (1) was evaluated in assays of fungal sphingomyelinases, also displaying phospholipase C activity. Reactions were terminated with a periodate-containing stop solution, leading to liberation of pNP, quantified spectrophotometrically in an end-point measurement. A kinetic evaluation of sphingomyelinases from Kionochaeta sp. and Penicillium emersonii showed relatively high KM and low kcat values for this substrate, limiting its practical applicability in assays with low sphingomyelinase concentrations.
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Affiliation(s)
| | | | - Jesper Brask
- Novozymes A/S, Krogshøjvej 36, 2880 Bagsværd, Denmark.
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6
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Guillemer S, Persillon C, Masson JM, Ravot G. Cell-free protein-based enzyme discovery and protein-ligand interaction study. Methods Mol Biol 2014; 1118:131-47. [PMID: 24395413 DOI: 10.1007/978-1-62703-782-2_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Cell-free expression-based screening is sometimes more suitable than cell-based assays for enzyme discovery. The advantage of cell-free systems for expression of toxic, poorly expressed, or insoluble proteins has already been well documented. Cell-free methods can advantageously replace cell-based ones when screening has to be performed on cell lysates prepared from harvested cells, for instance, when dealing with protein-ligand interactions particularly when the latter is hydrophobic. From our experience, cell-free extracts efficient in both transcription and translation can be prepared from potentially any microorganism. Here we present a general method for preparation of cell-free extracts from prokaryotic and eukaryotic cells, selection of the best systems, and optimized conditions for specific protein expression. The method allows to select proteins for their ability to bind a selected target, to identify the inhibitors of such binding, or to identify novel enzymatic activities.
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7
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Borsenberger V, Dornez E, Desrousseaux ML, Courtin CM, O’Donohue MJ, Fauré R. A substrate for the detection of broad specificity α-l-arabinofuranosidases with indirect release of a chromogenic group. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.136] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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8
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Liu JY, Zheng GW, Li CX, Yu HL, Pan J, Xu JH. Multi-substrate fingerprinting of esterolytic enzymes with a group of acetylated alcohols and statistic analysis of substrate spectrum. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.12.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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9
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Maillard N, Babiak P, Syed S, Biswas R, Mandrich L, Manco G, Reymond JL. Five-Substrate Cocktail as a Sensor Array for Measuring Enzyme Activity Fingerprints of Lipases and Esterases. Anal Chem 2011; 83:1437-42. [DOI: 10.1021/ac102994n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Noélie Maillard
- Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
| | - Peter Babiak
- Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
| | - Salahuddin Syed
- Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
| | - Rasomoy Biswas
- Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
| | - Luigi Mandrich
- Institute of Protein Biochemistry, National Research Council, Via Pietro Castellino 111, 80131 Naples, Italy
| | - Giuseppe Manco
- Institute of Protein Biochemistry, National Research Council, Via Pietro Castellino 111, 80131 Naples, Italy
| | - Jean-Louis Reymond
- Department of Chemistry and Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
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10
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Schmidt M, Böttcher D, Bornscheuer UT. Directed Evolution of Industrial Biocatalysts. Ind Biotechnol (New Rochelle N Y) 2010. [DOI: 10.1002/9783527630233.ch4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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11
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Marmuse L, Asther M, Navarro D, Lesage-Meessen L, Asther M, Fort S, Driguez H. Chromogenic substrates for feruloyl esterases. Carbohydr Res 2007; 342:2316-21. [PMID: 17599813 DOI: 10.1016/j.carres.2007.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Revised: 05/31/2007] [Accepted: 06/01/2007] [Indexed: 11/23/2022]
Abstract
Chromogenic mono- and diferuloyl-butanetriol analogs were prepared by chemical syntheses and their efficiency was evaluated as substrates for feruloyl esterases from Aspergillus niger.
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Affiliation(s)
- Laurence Marmuse
- Centre de Recherches, sur les Macromolécules Végétales, (CERMAV-CNRS), BP 53, F-38041 Grenoble, France
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Sicart R, Collin MP, Reymond JL. Fluorogenic substrates for lipases, esterases, and acylases using a TIM-mechanism for signal release. Biotechnol J 2007; 2:221-31. [PMID: 17219461 DOI: 10.1002/biot.200600181] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
3-Acyloxyl-2-oxopropyl ethers of umbelliferone were investigated as new fluorogenic substrates for lipases and esterases. The aliphatic primary alcohol-leaving group released the fluorescent product umbelliferone by an enolization/beta-elimination reaction similar to the triose phosphate isomerase (TIM) reaction. A similarly designed phenylacetamide provided a fluorescent probe for penicillin G acylase, whereby the enolization/beta-elimination sequence from the intermediate aminoketone was very fast and spontaneous even under acidic conditions. The corresponding epoxyketone was not fluorogenic with epoxide hydrolases (EH). These substrates represent periodate-free Clips-otrade mark substrates.
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Affiliation(s)
- Renaud Sicart
- Department of Chemistry and Biochemistry, University of Berne, Berne, Switzerland
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Reymond JL, Babiak P. Screening systems. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2007; 105:31-58. [PMID: 17408081 DOI: 10.1007/10_2006_032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Enzyme screening technology has undergone massive developments in recent years, particularly in the area of high-throughput screening and microarray methods. Screening consists of testing each sample of a sample library individually for the targeted reaction. This requires enzyme assays that accurately test relevant parameters of the reaction, such as catalytic turnover with a given substrate and selectivity parameters such as enantio- and regioselectivity. Enzyme assays also play an important role outside of enzyme screening, in particular for drug screening, medical diagnostics, and in the area of cellular and tissue imaging. In the 1990s, methods for high-throughput screening of enzyme activities were perceived as a critical bottleneck. As illustrated partly in this chapter, a large repertoire of efficient screening strategies are available today that allow testing of almost any reaction with high-throughput.
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Affiliation(s)
- Jean-Louis Reymond
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland.
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Haider MA, Pakshirajan K. Screening and optimization of media constituents for enhancing lipolytic activity by a soil microorganism using statistically designed experiments. Appl Biochem Biotechnol 2007; 141:377-90. [DOI: 10.1007/bf02729074] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2006] [Revised: 11/30/1999] [Accepted: 10/03/2006] [Indexed: 10/22/2022]
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Grognux J, Reymond JL. A red-fluorescent substrate microarray for lipase fingerprinting. MOLECULAR BIOSYSTEMS 2006; 2:492-8. [PMID: 17216030 DOI: 10.1039/b609275f] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A lipase substrate microarray was obtained by printing aliphatic C2-C12 monoesters of (5R)- and (5S)-3-(5,6-dihydroxyhexyloxy)benzaldehyde by reductive alkylation on amine-functionalized glass slides coated with bovine serum albumin and a short PEG linker. The microarray features 12 substrates and their 66 possible binary mixtures spotted in a 9 x 36 spot array. Lipase reactions are detected by chemoselective NaIO(4)-oxidation of the 1,2-diol hydrolysis product to form an aldehyde, which is then tagged with the red-fluorescent dye rhodamine B sulfohydrazide . Specific fingerprints are produced by active enzymes. These experiments provide the first example of lipase fingerprinting using microarrays.
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Affiliation(s)
- Johann Grognux
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
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16
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Yang Y, Babiak P, Reymond JL. New Monofunctionalized Fluorescein Derivatives for the Efficient High-Throughput Screening of Lipases and Esterases in Aqueous Media. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690041] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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Yang Y, Babiak P, Reymond JL. Low background FRET-substrates for lipases and esterases suitable for high-throughput screening under basic (pH 11) conditions. Org Biomol Chem 2006; 4:1746-54. [PMID: 16633567 DOI: 10.1039/b601151a] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
FRET-based fluorogenic substrates for lipases and esterases were prepared in four steps from commercially available building blocks. The substrates are pyrenebutyric acid monoesters of aliphatic 1,2-diols bearing a dinitrophenylamino group as a quencher. The most enzyme-reactive substrate is ester 2a. The substrates do not show any measurable background reaction in the absence of enzyme even at pH 11, but react fast and specifically with lipases and esterases. These substrates offer an unprecedented and practical solution to the long-standing problem of a simple yet efficient high-throughput screening tool for lipase activities under basic conditions.
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Affiliation(s)
- Yongzheng Yang
- Department of Chemistry & Biochemistry, University of Berne, Switzerland
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Sicard R, Goddard JP, Mazel M, Audiffrin C, Fourage L, Ravot G, Wahler D, Lefèvre F, Reymond JL. Multienzyme Profiling of Thermophilic Microorganisms with a Substrate Cocktail Assay. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505056] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Sicard R, Chen L, Marsaioli A, Reymond JL. A Fluorescence-Based Assay for Baeyer-Villiger Monooxygenases, Hydroxylases and Lactonases. Adv Synth Catal 2005. [DOI: 10.1002/adsc.200505040] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Yongzheng Y, Reymond JL. Protease profiling using a fluorescent domino peptide cocktail. MOLECULAR BIOSYSTEMS 2005; 1:57-63. [PMID: 16880964 DOI: 10.1039/b419446b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Five hexapeptides were prepared containing, in a domino-type arrangement, all 25 possible dipeptides between (1) aromatic, (2) hydrophobic, (3) positively charged, (4) negatively charged, and (5) small and polar amino acids. The peptides were fluorescence labeled at the N-terminus with a (7-coumaryl)oxyacetyl group, allowing the selective detection of N-terminal cleavage products. The five peptides were used as a cocktail reagent in an HPLC analysis. The cocktail produced specific cleavage patterns, or fingerprints, for a variety of proteases. This domino peptide cocktail can be used as a general reagent for protease identification and functional profiling.
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Affiliation(s)
- Yang Yongzheng
- Department of Chemistry & Biochemistry, University of Berne, Freiestrasse 3, 3012 Berne, Switzerland
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