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Muthukumar Y, Münkemer J, Mathieu D, Richter C, Schwalbe H, Steinmetz H, Kessler W, Reichelt J, Beutling U, Frank R, Büssow K, van den Heuvel J, Brönstrup M, Taylor RE, Laschat S, Sasse F. Investigations on the mode of action of gephyronic acid, an inhibitor of eukaryotic protein translation from myxobacteria. PLoS One 2018; 13:e0201605. [PMID: 30063768 PMCID: PMC6067752 DOI: 10.1371/journal.pone.0201605] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 07/18/2018] [Indexed: 11/19/2022] Open
Abstract
The identification of inhibitors of eukaryotic protein biosynthesis, which are targeting single translation factors, is highly demanded. Here we report on a small molecule inhibitor, gephyronic acid, isolated from the myxobacterium Archangium gephyra that inhibits growth of transformed mammalian cell lines in the nM range. In direct comparison, primary human fibroblasts were shown to be less sensitive to toxic effects of gephyronic acid than cancer-derived cells. Gephyronic acid is targeting the protein translation system. Experiments with IRES dual luciferase reporter assays identified it as an inhibitor of the translation initiation. DARTs approaches, co-localization studies and pull-down assays indicate that the binding partner could be the eukaryotic initiation factor 2 subunit alpha (eIF2α). Gephyronic acid seems to have a different mode of action than the structurally related polyketides tedanolide, myriaporone, and pederin and is a valuable tool for investigating the eukaryotic translation system. Because cancer derived cells were found to be especially sensitive, gephyronic acid could potentially find use as a drug candidate.
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Affiliation(s)
- Yazh Muthukumar
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Johanna Münkemer
- Institut für Organische Chemie, Universität Stuttgart, Stuttgart, Germany
| | - Daniel Mathieu
- Zentrum für Biomolekulare Magnetische Resonanz, Universität Frankfurt, Frankfurt, Germany
| | - Christian Richter
- Zentrum für Biomolekulare Magnetische Resonanz, Universität Frankfurt, Frankfurt, Germany
| | - Harald Schwalbe
- Zentrum für Biomolekulare Magnetische Resonanz, Universität Frankfurt, Frankfurt, Germany
| | - Heinrich Steinmetz
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Wolfgang Kessler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Joachim Reichelt
- Department of Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Ulrike Beutling
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Ronald Frank
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Konrad Büssow
- Department of Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Joop van den Heuvel
- Department of Structure and Function of Proteins, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Mark Brönstrup
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Richard E. Taylor
- Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, Indiana, United States of America
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Stuttgart, Germany
- * E-mail: (FS); (SL)
| | - Florenz Sasse
- Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany
- * E-mail: (FS); (SL)
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Anderl T, Nicolas L, Münkemer J, Muthukumar Y, Baro A, Frey W, Sasse F, Taylor RE, Laschat S. Synthesis and Biological Evaluation of Gephyronic Acid Derivatives: Initial Steps towards the Identification of the Biological Target of Polyketide Inhibitors of Eukaryotic Protein Synthesis. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Anderl T, Nicolas L, Münkemer J, Baro A, Sasse F, Steinmetz H, Jansen R, Höfle G, Taylor RE, Laschat S. Gephyronsäure, ein fehlendes Bindeglied zwischen Polyketid-Inhibitoren der eukaryotischen Proteinsynthese (Teil II): Totalsynthese. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005605] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Anderl T, Nicolas L, Münkemer J, Baro A, Sasse F, Steinmetz H, Jansen R, Höfle G, Taylor RE, Laschat S. Gephyronic acid, a missing link between polyketide inhibitors of eukaryotic protein synthesis (part II): Total synthesis of gephyronic acid. Angew Chem Int Ed Engl 2010; 50:942-5. [PMID: 21246697 DOI: 10.1002/anie.201005605] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Indexed: 11/10/2022]
Affiliation(s)
- Timo Anderl
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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