DDX5 is SUMOylated at lysine-53 with SUMO1 (Mooney et al. 2010, Matafora et al. 2009, Impens et al. 2014). SUMOylation enhances coactivation activity of DDX5, stability of DDX5, and interaction of DDX5 with HDAC1.
SUMO transferase activity of SUMO1:C93-UBE2I [cytoplasm]