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Farnesol inhibits translation to limit growth and filamentation in C. albicans and S. cerevisiae
Nkechi E. Egbe, Tawni O. Dornelles, Caroline M. Paget, Lydia M. Castelli and Mark P. Ashe
Candida albicans is a polymorphic yeast where the capacity to switch between yeast and filamentous growth is critical for pathogenicity. Farnesol is a quorum-sensing sesquiterpene alcohol that, via regulation of specific signalling and transcription components, inhibits filamentous growth in C. albicans. Here we show that farnesol also inhibits translation at the initiation step in both C. albicans and S. cerevisiae. In contrast to fusel alcohols, that target the eukaryotic initiation factor 2B (eIF2B), farnesol affects the interaction of the mRNA with the small ribosomal subunit leading to reduced levels of the 48S preinitiation ribosomal complex in S. cerevisiae. Therefore, farnesol targets a different step in the translation pathway than fusel alcohols to elicit a completely opposite physiological…
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