Abstract
Candida albicans is an important opportunistic pathogenic fungus in the human body. It is a common microbe inhabiting on the mucosa surfaces of healthy individuals, but may cause infections when the host immune system is weak. Autophagy is a “self-eating” process in eukaryotes, which can recover and utilize damaged organelles and misfolded proteins. Here we investigated the role of the autophagy-related protein Atg11 in C. albicans. Deletion of ATG11 led to the defect in growth under the nitrogen starvation condition. Western blotting and GFP localization further revealed that the transport and degradation of Atg8 was blocked in the atg11Δ/Δ mutant under both the nitrogen starvation and hypha-inducing conditions. Moreover, degradation of both Lap41 (the indicator of the cytoplasm-to-vacuole pathway) and Csp37 (the indicator of mitophagy) was also thoroughly suppressed in this mutant under nitrogen starvation. These results indicated that Atg11 plays an essential role in both non-selective and selective autophagy in C. albicans.
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