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Current and Future Experimental Strategies for Structural Analysis of Trichothecene Mycotoxins—A Prospectus
Agriculture and Agri-Food Canada, 5403 1 Ave S, Lethbridge, AB T1J 4B1, Canada
University of Lethbridge, 4401 University Dr W, Lethbridge, AB T1K 3M4, Canada
Agriculture and Agri-Food Canada, 930 Carling Ave, Ottawa, ON K1A 0C5, Canada
* Authors to whom correspondence should be addressed.
Received: 15 November 2011; in revised form: 12 December 2011 / Accepted: 13 December 2011 / Published: 19 December 2011
Abstract: Fungal toxins, such as those produced by members of the order Hypocreales, have widespread effects on cereal crops, resulting in yield losses and the potential for severe disease and mortality in humans and livestock. Among the most toxic are the trichothecenes. Trichothecenes have various detrimental effects on eukaryotic cells including an interference with protein production and the disruption of nucleic acid synthesis. However, these toxins can have a wide range of toxicity depending on the system. Major differences in the phytotoxicity and cytotoxicity of these mycotoxins are observed for individual members of the class, and variations in toxicity are observed among different species for each individual compound. Furthermore, while diverse toxicological effects are observed throughout the whole cellular system upon trichothecene exposure, the mechanism of toxicity is not well understood. In order to comprehend how these toxins interact with the cell, we must first have an advanced understanding of their structure and dynamics. The structural analysis of trichothecenes was a subject of major interest in the 1980s, and primarily focused on crystallographic and solution-state Nuclear Magnetic Resonance (NMR) spectroscopic studies. Recent advances in structural determination through solution- and solid-state NMR, as well as computation based molecular modeling is leading to a resurgent interest in the structure of these and other mycotoxins, with the focus shifting in the direction of structural dynamics. The purpose of this work is to first provide a brief overview of the structural data available on trichothecenes and a characterization of the methods commonly employed to obtain such information. A summary of the current understanding of the relationship between structure and known function of these compounds is also presented. Finally, a prospectus on the application of new emerging structural methods on these and other related systems is discussed.
Keywords: trichothecene; NMR; solid-state NMR; crystallography; NMR crystallography; natural product; mycotoxin; structure; structure-function; molecular modeling; molecular dynamics; antibiotic; ribosome
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Shank, R.A.; Foroud, N.A.; Hazendonk, P.; Eudes, F.; Blackwell, B.A. Current and Future Experimental Strategies for Structural Analysis of Trichothecene Mycotoxins—A Prospectus. Toxins 2011, 3, 1518-1553.
Shank RA, Foroud NA, Hazendonk P, Eudes F, Blackwell BA. Current and Future Experimental Strategies for Structural Analysis of Trichothecene Mycotoxins—A Prospectus. Toxins. 2011; 3(12):1518-1553.
Shank, Roxanne A.; Foroud, Nora A.; Hazendonk, Paul; Eudes, François; Blackwell, Barbara A. 2011. "Current and Future Experimental Strategies for Structural Analysis of Trichothecene Mycotoxins—A Prospectus." Toxins 3, no. 12: 1518-1553.