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Pka, Ras and RGS Protein Interactions Regulate Activity of AflR, a Zn(II)2Cys6 Transcription Factor in Aspergillus nidulans
Kiminori Shimizua, Julie K. Hicksb, Tzu-Pi Huanga, and Nancy P. Kelleraa Department of Plant Pathology, University of Wisconsin, Madison, Wisconsin 53706
b Department of Plant Pathology and Microbiology, Texas A&M University, College Station, Texas 77843
Corresponding author: Nancy P. Keller, Department of Plant Pathology, 882 Russell Labs, 1630 Linden Dr., Madison, WI 53706., npk{at}plantpath.wisc.edu (E-mail)
Communicating editor: J. LOROS
flbA background. This demonstrates negative regulation of AflR activity by phosphorylation and shows that FlbA post-transcriptional regulation of aflR is PkaA independent. AflR nucleocytoplasmic location further supports PkaA-independent regulation of AflR by FlbA. GFP-tagged AflR is localized to the cytoplasm when pkaA is overexpressed but nuclearly located in a
flbA background. aflR is also transcriptionally and post-transcriptionally regulated by RasA. RasA transcriptional control of aflR is PkaA independent but RasA post-transcriptional control of AflR is partially mediated by PkaA.
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