Acts at E2F-responsive promoters as coregulator to integrate signals provided by PHD- and/or bromodomain-containing transcription factors. May act as coactivator as well as corepressor of E2F1-TFDP1 and E2F4-TFDP1 complexes on E2F consensus binding sites, which would activate or inhibit E2F-target genes expression. Modulates fat storage by down-regulating the expression of key genes involved in adipocyte lipolysis, thermogenesis and oxidative metabolism. Interacts with XPO1; which mediates nuclear export. Interacts with TFDP1; modulates transactivation activity of TFDP1/E2F complexes. Exported out of the nucleus via its NES in a XPO1-dependent manner. Once in the cytoplasm, is degraded by the proteasome. Expressed in adipose tissue. Transcript levels remain constant in all phases of the cell cycle. In contrast, protein levels accumulate at the G1/S phase boundary and decrease progressively through S phase until G2/M phase is reached, residual expression is observed in the G2/M and early G1 phases. Polyubiquitinated, which promotes proteasomal degradation. Extended N-terminus.