biostudies-literatureUnknown2Schruefer S<i>Aspergillus fumigatus</i> is a major fungal pathogen causing life threatening infections in immunocompromised humans and certain animals. The HOG pathway is for two reasons interesting in this context: firstly, it is a stress signaling pathway that contributes to the ability of this pathogen to adapt to various stress conditions and secondly, it is the target of antifungal agents, such as fludioxonil or pyrrolnitrin. In this study, we demonstrate that Ypd1 is an essential protein in <i>A. fumigatus</i>. As the central component of the multistep phosphorelay it represents the functional link between the sensor histidine kinases and the downstream response regulators SskA and Skn7. A GFP-Ypd1 fusion was found to reside in both, the cytoplasm and the nucleus and this pattern was only slighFrontiers in fungal biology756990https://www.ebi.ac.uk/biostudies/studies/S-EPMC10512271biostudies-literatureYpd1 Is an Essential Protein of the Major Fungal Pathogen <i>Aspergillus fumigatus</i> and a Key Element in the Phosphorelay That Is Targeted by the Antifungal Drug Fludioxonil.PMC10512271Kleinemeier CSchruefer SEbel FSpadinger ASchmid LfalseYpd1 Is an Essential Protein of the Major Fungal Pathogen <i>Aspergillus fumigatus</i> and a Key Element in the Phosphorelay That Is Targeted by the Antifungal Drug Fludioxonil.<i>Aspergillus fumigatus</i> is a major fungal pathogen causing life threatening infections in immunocompromised humans and certain animals. The HOG pathway is for two reasons interesting in this context: firstly, it is a stress signaling pathway that contributes to the ability of this pathogen to adapt to various stress conditions and secondly, it is the target of antifungal agents, such as fludioxonil or pyrrolnitrin. In this study, we demonstrate that Ypd1 is an essential protein in <i>A. fumigatus</i>. As the central component of the multistep phosphorelay it represents the functional link between the sensor histidine kinases and the downstream response regulators SskA and Skn7. A GFP-Ypd1 fusion was found to reside in both, the cytoplasm and the nucleus and this pattern was only sligh2021-01-01T00:00:00Z20212025-04-22T15:26:55.138Z2024-11-15T10:26:23.363ZS-EPMC105122713774411810.3389/ffunb.2021.756990