DNA-dependent RNA polymerase catalyzes the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Component of the RNA polymerase III (Pol III) complex consisting of several subunits. Belongs to the eukaryotic RPB7/RPC8 RNA polymerase subunit family. The gene for this protein is duplicated in strains AX3 and AX4. These strains contain a duplication of a segment of 750 kb of chromosome 2 compared to the corresponding sequence in strain AX2.