Involved in transcription regulation by sequestering in the cytoplasm nuclear receptor coactivators such as NCOA1, NCOA2 and NCOA3 (By similarity). Involved in regulation of caspase-independent apoptosis by sequestering the proapoptotic factor AIFM1 in mitochondria (By similarity). Pro-apoptotic stimuli can induce its proteasomal degradation allowing the translocation of AIFM1 to the nucleus to induce apoptosis (By similarity). Involved in the negative control of vitamin D receptor signaling pathway (By similarity). Involved in actin stress fibers formation through its interaction with ARHGDIA and the regulation of the Rho signaling pathway (PubMed:25961457). May thereby play a role in cell adhesion and migration, regulating for instance podocytes migration during development of the kidney (PubMed:25961457). Through the Rho signaling pathway may also regulate cell proliferation (PubMed:16024821). Interacts (non-phosphorylated form) with NCOA1; NCOA2 AND NCOA3 (By similarity). Interacts with AIFM1 (By similarity). Interacts with ARHGDIA; the interaction is direct and may regulate the interaction of ARHGDIA with RHOA, RAC1 and CDC42 (By similarity). Interacts (via ANK repeats 1-5) with KIF21A (via residues 1148-1169) (By similarity). Widely expressed with highest levels in liver and skeletal muscle. Phosphorylated by casein kinase II upon estrogen stimulation (By similarity). Phosphorylation induces the release by KANK2 of NCOA1 and its translocation to the nucleus where NCOA1 can activate gene transcription (By similarity).