RRN3 RNA polymerase I transcription factor homolog (S. cerevisiae)
Transcription Initiation Factor 1A
Transcription initiation factor IA
Transcription initiation factor TIF IA
Required for efficient transcription initiation by RNA polymerase I. Required for the formation of the competent preinitiation complex (PIC). Dissociates from pol I as a consequence of transcription. In vitro, cannot activate transcription in a subsequent transcription reaction.
Belongs to the RRN3 family.
Phosphorylation is required for participation in rDNA transcription.