TFIIIB-Type 3 Promoter Selective Complex TFIIIB:SNAPc:Oct-1:Staf:Type 3 Promoter Complex SNAPc:Oct-1:Staf:Type 3 Promoter Complex Binding of TFIIIB to SNAPc:Oct-1:Staf:Type 3 Promoter Complex Authored: Hernandez, N, 2003-09-11 07:42:29 Edited: Gillespie, ME, 0000-00-00 00:00:00 Pubmed1535687 Pubmed1868835 Pubmed8339931 Reactome Database ID Release 4383793 Reactome, http://www.reactome.org ReactomeREACT_328 The snRNA activating protein complex (SNAPc) (Sadowski et al., 1993), the PSE binding protein (PBP) (Waldschmidt et al., 1991), or the PSE transcription factor (PTF) (Murphy et al., 1992). The complex contains five types of subunits and binds to the PSE. Type 3 promoters also recruit Brf2-TFIIIB through a combination of protein-protein contacts with SNAPc and a direct association of the TBP component of Brf2-TFIIIB with the TATA box. This then allows RNA polymerase III to join the complex.