Enables DNA-binding transcription activator activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and identical protein binding activity. Involved in several processes, including negative regulation of angiogenesis; negative regulation of blood vessel endothelial cell differentiation; and positive regulation of vascular associated smooth muscle cell proliferation. Located in fibrillar center and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]