Maf1 is a negative regulator of RNA polymerase III [1][2]. It targets the initiation factor TFIIIB [3].

1: Maf1p, a negative effector of RNA polymerase III in Saccharomyces cerevisiae. Pluta K, Lefebvre O, Martin NC, Smagowicz WJ, Stanford DR, Ellis SR, Hopper AK, Sentenac A, Boguta M; Mol Cell Biol. 2001;21:5031-5040. PMID:11438659

2: General repression of RNA polymerase III transcription is triggered by protein phosphatase type 2A-mediated dephosphorylation of Maf1. Oficjalska-Pham D, Harismendy O, Smagowicz WJ, Gonzalez de Peredo A, Boguta M, Sentenac A, Lefebvre O; Mol Cell. 2006;22:623-632. PMID:16762835

3: Maf1 is an essential mediator of diverse signals that repress RNA polymerase III transcription. Upadhya R, Lee J, Willis IM; Mol Cell. 2002;10:1489-1494. PMID:12504022