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Penicillium chrysogenum strain:P2niaD18::EGFP::MAT1-1-1

ABSTRACT: Penicillium chrysogenum

PROVIDER: PRJNA257456 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR1536900.fastq.gz	Fastqsanger.gz
	SRR1536901.fastq.gz	Fastqsanger.gz
	SRR1536902.fastq.gz	Fastqsanger.gz
	SRR1536903.fastq.gz	Fastqsanger.gz
	SRR1537287.fastq.gz	Fastqsanger.gz

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Project description:The recent discovery of a velvet complex containing several regulators of secondary metabolism in the model fungus Aspergillus nidulans raises the question whether similar type complexes direct fungal development in genera other than Aspergillus. Penicillium chrysogenum is the industrial producer of the antibiotic penicillin, whose biosynthetic regulation is barely understood. Here we provide a functional analysis of two major homologues of the velvet complex in P. chrysogenum, that we have named PcvelA and PclaeA. Data from array analysis using a ΔPcvelA deletion strain indicate a significant role of PcvelA on the expression of biosynthesis and developmental genes, including PclaeA. Northern hybridization and HPLC quantifications of penicillin titres clearly show that both PcvelA and PclaeA play a major role in penicillin biosynthesis. Both regulators are further involved in different and distinct developmental processes. While PcvelA deletion leads to light independent conidial formation, dichotomous branching of hyphae and pellet formation in shaking cultures, a ΔPclaeA strain shows a severe impairment in conidiophore formation in both the light and dark. Bimolecular fluorescence complementation assays finally provide evidence for a velvet-like complex in Penicillium chrysogenum, with structurally conserved components that have distinct developmental roles, illustrating the functional plasticity of these regulators within filamentous ascomycetes.

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