The Aspergillus fumigatus transcription factor AceA is involved not only in Cu but also in Zn detoxification through regulating transporters CrpA and ZrcA

Cellular Microbiology
Zhendong CaiLing Lu

Abstract

Copper (Cu) and zinc (Zn) are essential nutrients for both pathogens and hosts; however, their excess accumulation is toxic for all cells. The Aspergillus transcription factor AceA has been identified having function for Cu detoxification through up-regulation of the expression of the P-type ATPase, CrpA. Here, we demonstrate that Aspergillus fumigatus CrpA is involved in both Cu and Zn detoxification and a putative metallothionein AfCrdA plays a major function in Cu detoxification, and a putative transporter AfZrcA has a dominant role in Zn detoxification, but all three members are transcriptionally dependent on AfAceA. Moreover, the Cys, RGHR, and KGRP motifs in the conserved N-terminus of AfAceA are essential, but not sufficient for AfAceA-mediated Cu and Zn tolerance. Our findings suggest that fungal pathogens have developed very precise systems with overlapping machinery to respond to the two different metal stressors. Meanwhile, there is separate specific machinery for Zn detoxification in response to high environmental Zn. Importantly, virulence testing demonstrated that the conserved Cu and Zn detoxification-related Cys residues in AfAceA have key roles in pathogenesis. Therefore, these findings will broaden the current...Continue Reading

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Citations

May 28, 2019·Metallomics : Integrated Biometal Science·Damaris Lorenzo-GutiérrezLoida López-Fernández
May 17, 2019·International Microbiology : the Official Journal of the Spanish Society for Microbiology·Martzel Antsotegi-UskolaUnai Ugalde
Aug 31, 2020·Virulence·Damaris Lorenzo-GutiérrezLoida López-Fernández
Apr 26, 2019·International Journal of Molecular Sciences·Nicholas RaffaNancy P Keller
Apr 30, 2019·Frontiers in Microbiology·Jinxing SongJihong Jiang
Jul 18, 2020·Frontiers in Microbiology·Xin LiuJianrong Shi
Oct 22, 2020·International Journal of Molecular Sciences·Suzie KangCheol-Won Yun
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Jan 12, 2021·Seminars in Cell & Developmental Biology·Edward M Culbertson, Valeria C Culotta
Apr 4, 2021·Journal of Fungi·Janelle R RobinsonFelicia N Anike

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