Rapid, efficient auxin-inducible protein degradation in Candida pathogens
Milholland, K. L.; Gregor, J. B.; Hoda, S.; Piriz-Antunez, S.; Duenas-Santero, E.; Vu, B. G.; Patel, K. P.; Moye-Rowley, W. S.; Vazguez de Aldana, C. R.; Correa-Bordes, J.; Briggs, S. D.; Hall, M. C.
Show abstract
A variety of inducible protein degradation (IPD) systems have been developed as powerful tools for protein functional characterization. IPD systems provide a convenient mechanism for rapid inactivation of almost any target protein of interest. Auxin-inducible degradation (AID) is one of the most common IPD systems and has been established in diverse eukaryotic research model organisms. Thus far, IPD tools have not been developed for use in pathogenic fungal species. Here, we demonstrate that the original AID and the second generation AID2 systems work efficiently and rapidly in the human pathogenic yeasts Candida albicans and Candida glabrata. We developed a collection of plasmids that support AID system use in laboratory strains of these pathogens. These systems can induce >95% degradation of target proteins within minutes. In the case of AID2, maximal degradation was achieved at low nanomolar concentrations of the synthetic auxin analog 5-adamantyl-indole-3-acetic acid (5-Ad-IAA). Auxin-induced target degradation successfully phenocopied gene deletions in both species. The system should be readily adaptable to other fungal species and to clinical pathogen strains. Our results define the AID system as a powerful and convenient functional genomics tool for protein characterization in fungal pathogens.
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