Histone deacetylase 4 (HDAC4) contains import and export nuclear signal th at aids in nucleocytoplasmic shuttling. It has physical and functional interactions with transcription factor myocyte enhancer factor-2 (Mef2) protein and 14-3-3. This interaction disturbs nucleocytoplasmic shuttling and then guides HDAC4 to the cytoplasm and the nucleus, respectively. In addition, HDAC4 with HDAC5 and HDAC7 represses transcription by binding to the nuclear receptor co-repressors silencing mediator of retinoic acid and thyroid hormone receptors (SMRT) and nuclear receptor co-repressor (NCOR).', 'Studies show th at HDAC4 contains a composed import and export nuclear signal th at aids in nucleocytoplasmic shuttling. It has physical and functional interactions with transcription factor MEF2C and 14-3-3. This interaction results in the shuttling and it guides HDAC4 to the cytoplasm and the nucleus.The C-terminal domain of HDAC4 shows innate histone deacetylase activity. It is seen th at MEF2C combines with HDAC4 at the N-terminal domain and downmodulate c-jun promoter activity.
