DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Component of RNA polymerase I which synthesizes ribosomal RNA precursors. May be involved in recruitment of Pol I to rDNA promoters. Component of the RNA polymerase I (Pol I) complex consisting of 14 subunits. Part of a Pol I subcomplex consisting of the subunits A14 and A43 (By similarity). Interacts with ker1/A14. Contains an average of four phosphates per molecule. Belongs to the eukaryotic RPA43 RNA polymerase subunit family.