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Aspergillus luchuensis strain:IFO 4308

ABSTRACT: Genome analysis of Aspergillus luchuensis mut. kawachii

PROVIDER: PRJDB10968 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	DRR262015_1.fastq.gz	Fastqsanger.gz
	DRR262015_2.fastq.gz	Fastqsanger.gz
	DRR262016_1.fastq.gz	Fastqsanger.gz
	DRR262017_1.fastq.gz	Fastqsanger.gz

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Characterization of epigenetic regulators, HepA and LaeA, in Aspergillus luchuensis mut. kawachii

Project description:To investigate the roles of epigenetic regulator homologs, heterochromatin protein 1 (HepA) and a putative methyltransferase (LaeA), in the citric acid produciton by Aspergillus luchuensis mut. kawachii, we constructed the ΔhepA and ΔlaeA strains. We then performed gene expression profiling analysis using data obtained from RNA-seq of Aspergillus luchuensis mut. kawachii control, ΔhepA, and ΔlaeA strains.

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Global gene regulation by RNA-binding protein NrdA in Aspergillus luchuensis mut. kawachii

Project description:We report that the RNA-binding protein NrdA has a significant role on the global mRNA expression in the white koji fungus, Aspergillus luchuensis mut. kawachii. We constructed the nrdA conditional expression strain using the Tet-On system in A. kawachii. Downregulation of nrdA caused severe growth defect, indicating that NrdA is essential for proliferation of A. kawachii. Parallel RNA-seq and RNA immunoprecipitation (RIP)-seq analysis identified potential NrdA-interacted transcripts, corresponding to 32% of predicted protein coding genes of A. kawachii. Subsequent gene ontology analysis suggested that overexpression of NrdA affects a variety of metabolic activity including secondary metabolite production.

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Cap analysis gene expression (CAGE) of Aspergillus luchuensis mut. kawachii control and laeA disruptant strains

Project description:LaeA, a putative methyltransferase, is a global regulator for metabolic and development process in filamentous fungi. We characterized the laeA homologous genes in the white koji fungus, Aspergillus luchuensis mut. kawachii (A. kawachii) to examine their role in citric acid production. The ΔlaeA strain showed a significant reduction in the citric acid productivity. The cap-analysis gene expression (CAGE) revealed the laeA is required for the gene expression of a putative citrate exporter encoding cexA, which has a critical role for the citric acid production. The deficient citric acid productivity of the ΔlaeA strain was remedied by overexpression of cexA to a comparative level to that of the cexA overexpressing ΔcexA strain. In addition, chromatin immunoprecipitation coupled with quantitative PCR (ChIP-qPCR) analysis indicated that LaeA regulates gene expression of the citrate exporter encoding cexA gene via histone H3K4 and histone H3K9 methylation levels. These results indicate that LaeA is involved in the citric acid production through epigenetic regulation of cexA in A. kawachii.

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Characterization of epigenetic regulators, HepA and LaeA, in Aspergillus luchuensis mut. kawachii

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