Fig. 2. The enzymatic activity and non-enzymatic functions of HDAC3.
A HDAC3 is recruited to interact with NCoR or SMRT, forming nuclear receptor co-repressors complexes with G protein pathway suppressor 2 (GPS2), transducin β-like 1 (TBL1X), and TBL1-related protein 1 (TBL1XR). Co-repressors complexes binds to NR that have bound chromatin to perform transcriptional regulation dependent on its deacetylation function. B HDAC3 mutated in deacetylation sites directly binds to ATF2 to regulate transcription of inflammation-related genes independently of deacetylase activity. HDAC3 also can interact with PRC2 or SOX30 to regulates heart development and male fertility.