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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]

ABSTRACT: 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]

PROVIDER: PRJNA1305378 | ENA |

REPOSITORIES: ENA

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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

Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora TWF154 upon nematode exposure

Project description:We report the transcriptomic comparisions between key processes required for various stages of fungal carnivory in nematode-trapping fungus Arthrobotrys oligospora when induced with nematodes. The reference assembly used for remapping is A. oligospora TWF154 (GenBank assembly accession: GCA_004768765.1)

2023-07-01 | GSE233568 | GEO

AoSho1 and AoOpy2 are involved in the regulation of mycelial growth, sporulation, osmoregulation, and pathogenicity in Arthrobotrys oligospora

Project description:Arthrobotrys oligospora, a widely distributed nematode-trapping fungus, utilises adhesive mycelial nets (traps) to capture nematodes. As key components of the MAPK cascade, Sho1 and Opy2 are critical in the fungal stress response. This study examined the roles of homologous Sho1 (AoSho1) and Opy2 (AoOpy2) through gene knockdown, phenotypic analysis, and multi-omics approaches. The results revealed that knockdown of Aosho1 and Aoopy2 led to reduced mycelial growth, a significant decrease in spore production, trap formation, and nematode predation capacity. Furthermore, deletion of Aosho1 and Aoopy2 increased autophagic activity and heightened sensitivity to osmotic stress. Transcriptome analysis indicated that AoOpy2 functions as a multifaceted regulator in fungal growth, development, and environmental adaptation. Metabolomics data also suggested that AoSho1 and AoOpy2 are involved in several metabolic pathways. In conclusion, AoSho1 and AoOpy2 are essential for mycelial growth, osmoregulation, and the pathogenicity of A. oligospora. This study lays the groundwork for understanding the roles and potential mechanisms of the MAPK signalling pathway in the development and pathogenicity of nematode-trapping fungi.

2025-08-27 | GSE306156 | GEO

Genome-wide expression profiling of nematode-trapping fungus Arthrobotrys oligospora ku70 and ste12 strains upon nematode exposure

Project description:We report the transcriptomic comparisions between ku70 control and ste12 mutant strains in nematode-trapping fungus Arthrobotrys oligospora when induced with nematodes. Fungal Ste12 transcription factor and the upstream MAPK cascade are highly conserved and plays a role in host sensing and pathogenesis in various fungal pathogens. Identification of Ste12-dependent in A. oligospora may provide further insights into the molecular mechanisms of nematode-sensing and trap morphogenesis. The reference assemly used for remapping is A. oligospora TWF154 (GenBank assembly accession: GCA_004768765.1)

2020-10-24 | GSE159974 | GEO

TheArf‐GAPProteins AoAge1 and AoAge2 are Required for Mycelial Growth, Conidiation, Stress Responses, Trap Formation, and the Secondary Metabolism inthe Nematode-Trapping Fungus Arthrobotrys oligospora

Project description:ADP-ribosylation factors (Arfs) belong to the small GTPases superfamily and regulate mycelial development, endocytosis, and virulence in fungi. Nematode-trapping (NT) fungi can form unique infection structures (traps) to capture and kill free-living nematodes, thus play a potential role in the biocontrol of nematodes. Arthrobotrys oligospora is a representative species of the NT fungi. Here, the functions of two Arf-GAPs, Age1 (AoAge1) and Age2 (AoAge2) orthologue to S. cerevisiae were identified in A. oligospora by gene knockout and multi-phenotypic analysis. It was found that AoAge1 and AoAge2, especially AoAge2, play an important role in vegetative growth, conidiation, trap formation, DNA damage, endoplasmic reticulum stress, mitochondrial activity, endocytosis, heat shock stress, ROS level, and autophagy of A. oligospora. Importantly, our transcriptomic analysis (12 h) showed that nearly 62.7% of A. oligospora genes (11479) were directly or indirectly regulated by AoAge2, indicating that Arf-GAP plays a global role in the growth and development of A. oli gospora. Revealed by transcriptomic analysis differentially upregulated genes in the absence of Aoage2 were involved in autophagy and carbohydrate, amino acid and sphingolipid metabolism while downregulated genes were involved in longevity regulating pathway and carbohydrate, amino acid and secondary metabolites biosynthesis. In addition, metabolomic analysis showed that many compounds were markedly reduction in ΔAoage2 mutants strain. Our results highlighted that AoAge1 and AoAge2 play a crucial role in the asexual growth, development, differentiation, and lifestyle transition, especially, AoAge2 is indispensable for conidiation and trap morphogenesis of A. oligospora. These results demonstrated crucial roles for AoAge1 and AoAge2 in the fungal growth, environmental adaption and pathogenicity, which provided insights into the function of Arf-GAPs in A. oligospora and other fungi.

2024-01-26 | GSE253759 | GEO

The Arf‐GAP Proteins AoAge1 and AoAge2 are Required for Mycelial Growth, Conidiation, Stress Responses, Trap Formation, and the Secondary Metabolism in the Nematode-Trapping Fungus Arthrobotrys oligospora

2022-10-13 | GSE215079 | GEO

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

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

| PRJNA1303564 | ENA

Transcriptomic analysis reveals that Rho GTPases regulate trap development and lifestyle transition of the nematode-trapping fungus Arthrobotrys oligospora

Project description:Nematode-trapping (NT) fungi can form unique infection structures (traps) to capture and kill free-living nematodes, thus play a potential role in the biocontrol of nematodes. Arthrobotrys oligospora is a representative species of the NT fungi. Here we performed dual RNA-seq to understand the interaction between A. oligospora and Caenorhabditis elegans. We identified 5752 unique differentially expressed genes during trap formation and predation, and the rac gene was significantly upregulated. Alternative splicing events occurred in 896 2012 genes, including the rac and rho2 gene. Further, we characterized three Rho GTPases (Rho2, Rac, and Cdc42) in A. oligospora using gene disruption and multi-phenotypic analysis. The analyses showed that AoRac and AoCdc42 play an important role in mycelium growth, lipid accumulation, DNA damage, sporulation, trap formation, pathogenicity, and stress response in A. oligospora. Furthermore, AoCdc42 and AoRac specifically interacted with components of the Nox complex, thus regulating the production of reactive oxygen species. Furthermore, the transcript levels of several genes associated with the protein kinase A, mitogen-activated protein kinase, and p21-activated kinase were also altered in the mutants, suggesting that Rho GTPases might function upstream of these kinases. This study highlights the important role of Rho GTPases in A. oligospora and provides insights into the regulatory mechanism of signaling pathways in trap morphogenesis and lifestyle transition of NT fungi.

2021-12-24 | GSE192443 | GEO

Transcriptome analysis of Aofus3 in nematode-trapping fungus Arthrobotrys oligospora

Project description:Transcriptome analysis of Aofus3 in nematode-trapping fungus Arthrobotrys oligospora

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Transcriptome analysis of AoNmd5 in nematode-trapping fungus Arthrobotrys oligospora

Project description:Transcriptome analysis of AoNmd5 in nematode-trapping fungus Arthrobotrys oligospora

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