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Aspergillus wentii strain:IMI 49129

ABSTRACT: Aspergillus wentii strain:IMI 49129 Genome sequencing and assembly

PROVIDER: PRJNA826222 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR18856259_1.fastq.gz	Fastqsanger.gz
	SRR18856259_2.fastq.gz	Fastqsanger.gz

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Aspergillus nidulans gfdB, encoding the hyperosmotic stress protein glycerol-3-phosphate dehydrogenase, disturbs osmoadaptation in Aspergillus wentii

Project description:The genome of the osmophilic Aspergillus wentii, unlike that of the osmotolerant Aspergillus nidulans, contains only the gfdA but not the gfdB glycerol 3-phosphate dehydrogenase gene. Here, we studied transcriptomic changes of A. nidulans (reference strain and DgfdB gene deletion mutant) and A. wentii (reference strain and An-gfdB expressing mutant) elicited by high osmolarity. A. nidulans showed canonic hyperosmotic stress response characterized by upregulation of trehalose and glycerol metabolism genes (including gfdB) as well as genes of the high-osmolarity glycerol (HOG) map kinase pathway. Deletion of gfdB caused only negligible alterations in the transcriptome suggesting that the glycerol metabolism was flexible enough to compensate for the missing GfdB activity in this species. A. wentii responded differently to increased osmolarity than A. nidulans: E.g.; bulk upregulation of glycerol and trehalose metabolism genes as well as HOG pathway genes were not detected. Expression of An-gfdB in A. wentii did not abolish osmophilia, but it reduced growth and caused much bigger alterations in the transcriptome than the missing gfdB gene did in A. nidulans. Flexible glycerol metabolism and hence two differently regulated gfd genes may be more beneficial for osmotolerant (living under changing osmolarity) than for osmophilic (living under constantly high osmolarity) species.

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