Transcription factor probably involved in regulation of gene cluster that mediates the biosynthesis of a tyrosine-derived cytochalasan acting as a fungal signal recognized by resistant rice plants and leads to avirulence in Pi33 resistant rice cultivars. Expressed exclusively during fungal penetration of host leaves, the time point at which plant defense reactions are triggered. Due to high divergence, the Zn(2)-C6 fungal-type DNA-binding domain cannot be predicted.