Predicted to enable nucleic acid binding activity and zinc ion binding activity. Predicted to contribute to DNA-directed 5'-3' RNA polymerase activity. Predicted to be involved in maintenance of transcriptional fidelity during DNA-templated transcription elongation from RNA polymerase II promoter; transcription initiation from RNA polymerase II promoter; and transcription-coupled nucleotide-excision repair. Predicted to be located in nucleoplasm. Predicted to be part of RNA polymerase II, core complex. Orthologous to human POLR2I (RNA polymerase II subunit I). [provided by Alliance of Genome Resources, Apr 2022]