Abstract
Cyclopiazonic acid is a toxic metabolite of fungal origin that inhibits protein synthesis in intact HeLa cells and eukaryotic cell-free systems. It has been shown that cyclopiazonic acid blocks the GTP- and EF-1-dependent binding of (3H)Phe-tRNA to 80S ribosomes. Moreover the translocation of N-Ac-(3H)Phe-tRNA by 80S ribosomes that takes place in the presence of EF-2 and GTP is also halted by cyclopiazonic acid. It is concluded that this drug affects a ribosomal site involved in the alternative interaction of elongation factors EF-1 and EF-2.
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Zaera, E., Santamaría, F., Vázquez, D. et al. Inhibition of translation by the fungal toxin cyclopiazonic acid. Current Microbiology 9, 259–261 (1983). https://doi.org/10.1007/BF01567197
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DOI: https://doi.org/10.1007/BF01567197