Predicted to enable DNA-binding transcription activator activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and protein heterodimerization activity. Predicted to be involved in several processes, including negative regulation of cold-induced thermogenesis; positive regulation of brown fat cell differentiation; and positive regulation of transcription by RNA polymerase II. Predicted to act upstream of or within positive regulation of transcription, DNA-templated and regulation of osteoclast differentiation. Predicted to be located in cytosol and nucleoplasm. Predicted to be active in nucleus. Human ortholog(s) of this gene implicated in renal cell carcinoma. Orthologous to human TFE3 (transcription factor binding to IGHM enhancer 3). [provided by Alliance of Genome Resources, Apr 2022]