Component of the UAF (upstream activation factor) complex which interacts with the upstream element of the RNA polymerase I promoter and forms a stable preinitiation complex. Together with SPT15/TBP UAF seems to stimulate basal transcription to a fully activated level. Component of the UAF (upstream activation factor) complex which consists of UAF30, RRN5, RRN9, RRN10, and histones H3 and H4. Interacts with SPT15 and RRN7. Belongs to the RRN9 family.