Acts as a basic transcriptional regulator. Represses basic transcription driven by several virus and cellular promoters. When associated with BRD7, activates transcription of glucocorticoid-responsive promoter in the absence of ligand-stimulation. Also plays a role in mRNA processing and transport. Binds avidly to poly(G) and poly(C) RNA homopolymers in vitro (By similarity). Interacts with BRD7, PRMT2, TP53 and NXF1. Associates with histones and BRD7 (By similarity). The RGG-box domain is methylated. Methylated. Extended N-terminus.