Transcription factor that regulates the expression of the gene cluster that mediates the biosynthesis of fusarubins, highly pigmented naphthoquinones responsible for the coloration of the fruiting bodies (PubMed:22492438, PubMed:23825955). Expression is induced in presence of sodium nitrate, and repressed by glutamine (PubMed:22492438). Impairs the red pigmentation due to the production of fusarubin (PubMed:22492438). Results in complete down-regulation of the other five FSR genes (PubMed:22492438).