Enables DNA-binding transcription activator activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and protein heterodimerization activity. Involved in several processes, including defense response to Gram-negative bacterium; embryonic placenta development; and positive regulation of transcription by RNA polymerase II. Acts upstream of or within lysosome organization and positive regulation of transcription, DNA-templated. Located in cytoplasm and nucleus. Part of transcription regulator complex. Is expressed in several structures, including cardiovascular system; central nervous system; early conceptus; genitourinary system; and gut gland. Orthologous to human TFEB (transcription factor EB). [provided by Alliance of Genome Resources, Apr 2022]