Acts as a transcriptional regulator. Promotes transcription repression (By similarity). Promotes transcription activation in differentiated myotubes. Binds to double- and single-stranded DNA sequences (By similarity). Binds to the transcription suppressor CATR sequence of the COX5B promoter. Binds with high affinity to RNA molecules that contain AU-rich elements (AREs) found within the 3'-UTR of many proto-oncogenes and cytokine mRNAs (By similarity). Binds both to nuclear and cytoplasmic poly(A) mRNAs (By similarity). Binds to poly(G) and poly(A), but not to poly(U) or poly(C) RNA homopolymers (By similarity). Binds to the 5'-ACUAGC-3' RNA consensus sequence (By similarity). Interacts with TNPO1 (By similarity). Interacts with ZNF148. Shuttles between the nucleus and the cytoplasm in a TNPO1-dependent manner. Expressed in skeletal muscle, myoblast, myotube, heart, brain, liver, kidney, heart, lung, stomach, small intestine, large intestine, spleen, and testis (at protein level). Expressed in brain, skeletal muscle, heart, lung, liver, stomach, small intestine, large intestine, kidney, spleen and testis. Dimethylation of Arg-289 is probably of the asymmetric type.