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AoMbp1 interacts with AoSwi6 and plays pleiotropic roles in mycelial development, trap morphogenesis, and stress respone in the nematode-trapping fungus Arthrobotrys oligospora

ABSTRACT: DAP-Seq analysis revealed that AoMbp1 was involved in cellular growth and diverse metabolic processes.

ORGANISM(S): Orbilia oligospora

PROVIDER: GSE304932 | GEO | 2025/09/11

REPOSITORIES: GEO

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AoMbp1 interacts with AoSwi6 and plays pleiotropic roles in mycelial development, trap morphogenesis, and stress respone in the nematode-trapping fungus Arthrobotrys oligospora [RNA-Seq]

Project description:The fungal specific APSES family proteins involve in regulating fungal growth, development, and multiple biological processes. In this study, AoMbp1, an ortholog of Saccharomyces cerevisiae APSES-type transcription factor Mbp1, was functionally analyzed in a representative nematode-trapping fungus Arthrobotrys oligospora. Inactivation of Aombp1 caused a severe affect on the mycelial growth and development, the mycelial growth rate of ∆Aombp1 mutant was remarkably decreased, the hyphal septa were increased whereas the number of nuclei were significantly reduced, and the lipid droplet accumulation was remarkably increased. Meanwhile, the deletion of Aombp1 resulted a considerable reduction in the number of conidiophores and spore yield, which also caused abnormal spore morphology. In addition, the ∆Aombp1 mutants became more sensitive to several chemical stressors, especially to hyperosmotic reagents. Importantly, disruption of Aombp1 caused the number of traps and nematode-trapping ability were significantly reduced, and most of the traps have changed from their original three-dimensional structure to a planar shape. RNA-Seq, DAP-Seq and Y2H assay showed that AoMbp1 interacted with AoSwi6, and involved in regulating cell cycle, meiosis, lipid metabolism, DNA replication, mismatch repair and nucleotide excision repair. Our study elucidated the functions and potential regulatory mechanism of APSES protein Mbp1 in the mycelial development and trap morphogenesis of nematode-trapping fungi.

2025-09-11 | GSE305351 | GEO