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The cAMP-PKA signaling pathway regulates hyphal growth, conidiation, trap morphogenesis, stress tolerance and autophagy in Arthrobotrys oligospora

ABSTRACT: Signal transduction plays a crucial role in defending against external environmental challenges, which can modulate the cellular response to external stimuli. cAMP/PKA signaling pathway is one of the most important signaling circuits and is evolutionarily conserved in eukaryotes. A. oligospora is a typical nematode-trapping fungi that can specialize adhesive network traps to kill nematodes after sensing the signals. To elucidate the biological roles of cAMP-PKA signaling pathway, we characterized an adenylate cyclase orthologous protein, AoAcy, a cAMP-dependent protein kinase regulator, AoPKaR, and two cAMP-dependent protein kinase catalytic subunits, AoPKaCs in A. oligospora. Furthermore, phenotypic analysis of the gene disruption strains showed that the deletion of AoAcy resulted in a significant decrease in the content of cAMP and arthrobotrisins, and the results indicated that AoAcy, AoPKaR and AoPKaC1 were involved in the hyphae growth, trap morphogenesis, sporulation, stress resistance and autophagy. In addition, AoAcy and AoPKaC1 were also participated in the regulation of mitochondria, thereby affecting energy metabolism. While AoPKaC2 only affected sporulation, the number of nuclei and autophagy. Collectively, these findings highlight the essential role of cAMP/PKA signaling pathway in A. oligospora and provide insights into the regulation mechanisms of signaling pathways in trap formation and sporulation.

ORGANISM(S): Orbilia oligospora ATCC 24927

PROVIDER: GSE210886 | GEO | 2022/08/13

REPOSITORIES: GEO

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