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- W2133460832 abstract "The cAMP signal transduction pathway controls many processes in fungi. The pkaR gene, encoding the regulatory subunit (PKA-R) of cAMP-dependent protein kinase (PKA), was cloned from the industrially important filamentous fungus Aspergillus niger. To investigate the involvement of PKA in morphology of A. niger, a set of transformants which overexpressed pkaR or pkaC (encoding the catalytic subunit of PKA) either individually or simultaneously was prepared as well as mutants in which pkaR and/or pkaC were disrupted. Strains overexpressing pkaR or both pkaC and pkaR could not be distinguished from the wild-type, suggesting that regulation of PKA activity is normal in these strains. Absence of PKA activity resulted in a two- to threefold reduction in colony diameter on plates. The most severe phenotype was observed in the absence of PKA-R, i.e., very small colonies on plates, absence of sporulation and complete loss of growth polarity during submerged growth. Suppressor mutations easily developed in the DeltapkaR mutant and one of these mutants appeared to lack PKA-C activity. These data suggest that cAMP-dependent protein phosphorylation in A. niger regulates growth polarity and formation of conidiospores." @default.
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- W2133460832 date "2002-08-01" @default.
- W2133460832 modified "2023-10-18" @default.
- W2133460832 title "Cyclic AMP-dependent protein kinase is involved in morphogenesis of Aspergillus niger a aThe EMBL accession number for the sequence reported in this paper is AJ296317." @default.
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- W2133460832 doi "https://doi.org/10.1099/00221287-148-8-2635" @default.
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