Enables core promoter sequence-specific DNA binding activity. Predicted to be involved in DNA-templated transcription, termination; positive regulation of RNA splicing; and transcription by RNA polymerase II. Located in euchromatin and nucleus. Is expressed in several structures, including alimentary system; brain; genitourinary system; integumental system; and sensory organ. Orthologous to human POLR2A (RNA polymerase II subunit A). [provided by Alliance of Genome Resources, Apr 2022]