Cooperation between protein kinase A (PKA) and high osmolarity glycerol reponse (HOG) pathways is affecting cell wall carbohydrate mobilization in Aspergillus fumigatus

de Assis, Leandro José; Manfiolli, Adriana; Mattos, Eliciane; Malavazi, Iran; Jacobsen, Ilse D.; Brock, Matthias; Cramer, Robert A.; Thammahong, Arsa; Hagiwara, Daisuke; Nicolas Annick Ries, Laure; Goldman, Gustavo Henrique

Abstract

Aspergillus fumigatus mitogen-activated protein kinases (MAPKs) are involved in maintaining the normal morphology of the cell wall and providing resistance against cell wall-damaging agents. Upon cell wall stress, cell wall-related sugars need to be synthesized from carbohydrate storage compounds. Here we show that this process is dependent on cAMP-dependent protein kinase A (PKA) activity and regulated by the high-osmolarity glycerol response (HOG) MAPKs SakA and MpkC. These protein kinases are necessary for normal accumulation/degradation of trehalose and glycogen, and the lack of these genes reduces glucose uptake and glycogen synthesis. Alterations in glycogen synthesis were observed for the sakA and mpkC deletion mutants, which also displayed alterations in carbohydrate exposure on the cell wall. Carbohydrate mobilization is controlled by SakA interaction with PkaC1 and PkaR, suggesting a putative mechanism where the PkaR regulatory subunit leaves the complex and releases the SakA-PkaC1 complex for activation of enzymes involved in carbohydrate mobilization. This work reveals the communication between the HOG and PKA pathways for carbohydrate mobilization for cell wall construction.

Citation

de Assis, L. J., Manfiolli, A., Mattos, E., Malavazi, I., Jacobsen, I. D., Brock, M., Cramer, R. A., Thammahong, A., Hagiwara, D., Nicolas Annick Ries, L., & Goldman, G. H. (2018). Cooperation between protein kinase A (PKA) and high osmolarity glycerol reponse (HOG) pathways is affecting cell wall carbohydrate mobilization in Aspergillus fumigatus. mBio, 9(6), Article e01952-18. https://doi.org/10.1128/mBio.01952-18

• Journal Article Type: Article
• Acceptance Date: Nov 6, 2018
• Publication Date: Dec 11, 2018
• Deposit Date: Nov 20, 2018
• Publicly Available Date: Jan 23, 2019
• Journal: mBio
• Print ISSN: 2161-2129
• Electronic ISSN: 2150-7511
• Publisher: American Society for Microbiology
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 6
• Article Number: e01952-18
• DOI: https://doi.org/10.1128/mBio.01952-18
• Public URL: https://nottingham-repository.worktribe.com/output/1288479
• Publisher URL: https://mbio.asm.org/content/9/6/e01952-18
• Contract Date: Jan 23, 2019