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Ma J, Zhan L, Li RS, Gao PF, Huang CZ. Color-Encoded Assays for the Simultaneous Quantification of Dual Cancer Biomarkers. Anal Chem 2017; 89:8484-8489. [DOI: 10.1021/acs.analchem.7b02033] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jun Ma
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry,
Ministry of Education, College of Chemistry and Chemical Engineering, ‡College of Pharmaceutical
Sciences, Southwest University, Chongqing 400715, China
| | - Lei Zhan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry,
Ministry of Education, College of Chemistry and Chemical Engineering, ‡College of Pharmaceutical
Sciences, Southwest University, Chongqing 400715, China
| | - Rong Sheng Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry,
Ministry of Education, College of Chemistry and Chemical Engineering, ‡College of Pharmaceutical
Sciences, Southwest University, Chongqing 400715, China
| | - Peng Fei Gao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry,
Ministry of Education, College of Chemistry and Chemical Engineering, ‡College of Pharmaceutical
Sciences, Southwest University, Chongqing 400715, China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry,
Ministry of Education, College of Chemistry and Chemical Engineering, ‡College of Pharmaceutical
Sciences, Southwest University, Chongqing 400715, China
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Liebl W, Angelov A, Juergensen J, Chow J, Loeschcke A, Drepper T, Classen T, Pietruszka J, Ehrenreich A, Streit WR, Jaeger KE. Alternative hosts for functional (meta)genome analysis. Appl Microbiol Biotechnol 2014; 98:8099-109. [PMID: 25091044 DOI: 10.1007/s00253-014-5961-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/14/2014] [Accepted: 07/15/2014] [Indexed: 11/25/2022]
Abstract
Microorganisms are ubiquitous on earth, often forming complex microbial communities in numerous different habitats. Most of these organisms cannot be readily cultivated in the laboratory using standard media and growth conditions. However, it is possible to gain access to the vast genetic, enzymatic, and metabolic diversity present in these microbial communities using cultivation-independent approaches such as sequence- or function-based metagenomics. Function-based analysis is dependent on heterologous expression of metagenomic libraries in a genetically amenable cloning and expression host. To date, Escherichia coli is used in most cases; however, this has the drawback that many genes from heterologous genomes and complex metagenomes are expressed in E. coli either at very low levels or not at all. This review emphasizes the importance of establishing alternative microbial expression systems consisting of different genera and species as well as customized strains and vectors optimized for heterologous expression of membrane proteins, multigene clusters encoding protein complexes or entire metabolic pathways. The use of alternative host-vector systems will complement current metagenomic screening efforts and expand the yield of novel biocatalysts, metabolic pathways, and useful metabolites to be identified from environmental samples.
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Affiliation(s)
- Wolfgang Liebl
- Lehrstuhl für Mikrobiologie, Technische Universität München, Emil-Ramann-Str. 4, 85654, Freising, Germany,
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Cheval NP, Dikova A, Blanc A, Weibel JM, Pale P. Vinyl nosylates: an ideal partner for palladium-catalyzed cross-coupling reactions. Chemistry 2013; 19:8765-8. [PMID: 23695947 DOI: 10.1002/chem.201300127] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Nicolas P Cheval
- Laboratoire de Synthèse, Réactivité Organiques & Catalyse, Institut de Chimie de Strasbourg, associé au CNRS, Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France
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Yi D, Devamani T, Abdoul-Zabar J, Charmantray F, Helaine V, Hecquet L, Fessner WD. A pH-Based High-Throughput Assay for Transketolase: Fingerprinting of Substrate Tolerance and Quantitative Kinetics. Chembiochem 2012; 13:2290-300. [DOI: 10.1002/cbic.201200364] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Indexed: 11/05/2022]
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Bedia C, Casas J, Garcia V, Levade T, Fabriàs G. Synthesis of a Novel Ceramide Analogue and its Use in a High-Throughput Fluorogenic Assay for Ceramidases. Chembiochem 2007; 8:642-8. [PMID: 17361980 DOI: 10.1002/cbic.200600533] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Several investigations have shown that acid ceramidase inhibitors are potential antiproliferative and cytostatic drugs for cancer chemotherapy. The combinatorial chemistry approach for the discovery of acid ceramidase inhibitors requires the availability of a high-throughput enzyme assay. The synthesis of a novel fluorogenic ceramidase substrate, and its processing both in vitro and in cultured cells in a microtiter plate layout, are reported in this article. This coumarinic substrate was hydrolyzed in vitro (rat liver lysosomes) with Km and Vmax values of 113 microM and 3.6 pmol min-1 mg-1, respectively. Similarly, hydrolysis occurred in intact cultured cells that overexpressed acidic ceramidase. The assay was validated for the identification and characterization of acidic ceramidase inhibitors by using several alpha-ketoamide ceramide analogues, whose inhibitory activity had been previously described.
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Affiliation(s)
- Carmen Bedia
- Research Unit on BioActive Molecules, Departamento de Química Orgánica Biológica, Instituto de Investigaciones Químicas y Ambientales de Barcelona, CSIC, Jordi Girona 18, 08034 Barcelona, Spain
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Abstract
Fingerprints of lipases and esterases have been recorded by using an array of chiral fluorogenic aliphatic esters of increasing chain length (C(4)-C(16)). Classification of the enzyme series was carried out with selectivity data by clustering and principal component analysis (PCA). Enzymes were classified on the basis of selectivity for chain length (C(4)-C(6) vs. C(10)-C(16)) and of middle-chain-length (C(8)-C(10)) reactivity. A minimum set of nine substrates was defined by cluster analysis of relative reactivities of each substrate for the different enzymes. This selectivity-based analysis is general. It does not require a common reference substrate to react with all enzymes or vice versa, and is independent of knowing the exact concentration of active protein in the enzyme samples.
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Affiliation(s)
- Johann Grognux
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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Lagarde D, Nguyen HK, Ravot G, Wahler D, Reymond JL, Hills G, Veit T, Lefevre F. High-Throughput Screening of Thermostable Esterases for Industrial Bioconversions. Org Process Res Dev 2002. [DOI: 10.1021/op020019h] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Delphine Lagarde
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Hong-Khanh Nguyen
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Gilles Ravot
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Denis Wahler
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Jean-Louis Reymond
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Geoffrey Hills
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Thomas Veit
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
| | - Fabrice Lefevre
- Proteus SA, 70 allée Graham Bell, 30000 Nîmes, France, University of Bern, Department of Chemistry and Biochemistry, Freiestrasse 3, 3012 Bern, Switzerland, and Degussa AG, Goldschmidtstrasse 100, 45127 Essen, Germany
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