Component of RNA polymerase I core factor complex (CF) that acts as a SUA7/TFIIB-like factor and plays a key role in multiple steps during transcription initiation such as pre-initiation complex (PIC) assembly and postpolymerase recruitment events in polymerase I (Pol I) transcription. Binds rDNA promoters and plays a role in Pol I recruitment. After binding of UAF (upstream activation factor) to an upstream element of the promoter, CF is recruited in a SPT15/TBP-dependent manner to form a pre-initiation complex. Component of the core factor (CF) complex, which consists of RRN6, RRN7 and RRN11. The CF heterotrimer may further dimerize to form a hexamer. RRN7 interacts with RRN6, RRN11, SPT15 and RRN9. Although it shares weak sequence similarity with SUA7/TFIIB, displays a similar subdomain organization as SUA7/TFIIB, with a N-terminal zinc finger, a connecting region (composed of B-reader and B-linker regions), followed by 2 cyclin folds. Present with 398 molecules/cell in log phase SD medium. Belongs to the RRN7/TAF1B family.