The Spt10 GNAT Superfamily Protein Modulates Development, Cell Cycle Progression and Virulence in the Fungal Insect Pathogen, Beauveria bassiana

Journal of Fungi

Jia-Tao Xie¹  Qing Cai¹  Dao-Hong Jiang¹  Nemat O. Keyhani²  Juan-Juan Wang³ 

[1] College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;Department of Microbiology and Cell Science, University of Florida, Bldg. 981, Museum Rd., Gainesville, FL 32611, USA;School of Biological Science and Biotechnology, University of Jinan, Jinan 250022, China;

关键词: histone acetyltransferase;    virulence;    asexual development;    cell cycle;    hyphal septation;    metabolism;   

DOI  :  10.3390/jof7110905

来源: DOAJ

【 摘 要 】

Chromatin remodeling is mediated in part by post-translational acetylation/deacetylation modifications of histones. Histone acetyltransferases (HATs), e.g., members of the GNAT/MYST superfamily, activate gene transcription via promotion of euchromatin formation. Here, we characterized a GNAT family HAT, Spt10 (BbSpt10), in the environmentally and economically important fungal insect pathogen, Beauveria bassiana. Targeted gene knockout of BbSpt10 resulted in impaired asexual development and morphogenesis; reduced abilities to utilize various carbon/nitrogen sources; reduced tolerance to heat, fungicides, and DNA damage stress; and attenuated virulence. The ΔBbSpt10 mutant showed disrupted cell cycle development and abnormal hyphal septation patterns. Transcriptome analyses of wild type and ΔBbSpt10 cells revealed the differential expression of 373 genes, including 153 downregulated and 220 upregulated genes. Bioinformatic analyses revealed downregulated genes to be enriched in pathways involved in amino acid metabolism, cellular transportation, cell type differentiation, and virulence, while upregulated genes were enriched in carbon/nitrogen metabolism, lipid metabolism, DNA process, and cell rescue, defense, and virulence. Downregulated virulence genes included hydrophobins, cellular transporters (ABC and MFS multidrug transporters) and cytochrome P450 detoxification genes. These data indicated broad effects of BbSpt10 on fungal development, multi-stress response, and virulence.

【 授权许可】

Unknown