Mediator of diverse signals that repress RNA polymerase III transcription. Inhibits the de novo assembly of TFIIIB onto DNA. Phosphorylated by PKA in a TORC1-dependent manner. Phosphorylation at PKA consensus sites RRxS/T decreases upon rapamycin treatment. Present with 1720 molecules/cell in log phase SD medium. Belongs to the MAF1 family.