Synthesis facilitates an understanding of the structural basis for translation inhibition by the lissoclimides.Konst, Z.A., Szklarski, A.R., Pellegrino, S., Michalak, S.E., Meyer, M., Zanette, C., Cencic, R., Nam, S., Voora, V.K., Horne, D.A., Pelletier, J., Mobley, D.L., Yusupova, G., Yusupov, M., Vanderwal, C.D.
(2017) Nat Chem 9: 1140-1149
- PubMed: 29064494
- DOI: 10.1038/nchem.2800
- PubMed Abstract:
The lissoclimides are unusual succinimide-containing labdane diterpenoids that were reported to be potent cytotoxins. Our short semisynthesis and analogue-oriented synthesis approaches provide a series of lissoclimide natural products and analogues t ...
The lissoclimides are unusual succinimide-containing labdane diterpenoids that were reported to be potent cytotoxins. Our short semisynthesis and analogue-oriented synthesis approaches provide a series of lissoclimide natural products and analogues that expand the structure-activity relationships (SARs) in this family. The semisynthesis approach yielded significant quantities of chlorolissoclimide (CL) to permit an evaluation against the National Cancer Institute's 60-cell line panel and allowed us to obtain an X-ray co-crystal structure of the synthetic secondary metabolite with the eukaryotic 80S ribosome. Although it shares a binding site with other imide-based natural product translation inhibitors, CL engages in a particularly interesting and novel face-on halogen-π interaction between the ligand's alkyl chloride and a guanine residue. Our analogue-oriented synthesis provides many more lissoclimide compounds, which were tested against aggressive human cancer cell lines and for protein synthesis inhibitory activity. Finally, computational modelling was used to explain the SARs of certain key compounds and set the stage for the structure-guided design of better translation inhibitors.
Department of Molecular Medicine, Beckman Research Institute, City of Hope Comprehensive Cancer Center, 1500 East Duarte Road, Duarte, California 91010, USA.,Department of Pharmaceutical Sciences, University of California, Irvine, California 91010 92697, USA.,Department of Biochemistry, McGill University, Montréal, Québec H3G 1Y6, Canada.,Department of Chemistry, University of California, 1102 Natural Sciences II, Irvine, California 92697-2025, USA.,Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France.