Transcriptional corepressor. Corepressor of MTG8 transcriptional repression. Recruits NR2E1 to repress transcription. Has some intrinsic repression activity. Promotes vascular smooth cell (VSMC) migration and orientation (By similarity). Interacts with NR2E1; the interaction represses the transcriptional activity of NR2E1. Interacts with BAIAP2, WWP1, WWP2, WWP3 and RERE. Interacts (via its N-terminus) with MTG8; the interaction enhances transcriptional repression of MTG8. Interacts with FAT1 (via a C-terminal domain). Interacts with PQBP1 (By similarity). Shuttles between nucleus and cytoplasm. Colocalizes with FAT1 in the perinuclear area, at cell-cell junctions and leading edges of cells. Colocalizes with MTG8 in discrete nuclear dots (By similarity). Phosphorylated in vitro by MAPK8/JNK1 on Ser-735.