Oxygenated flavonoid derivatives have been shown to inhibit the single step in the sumoylation cascade: the transfer of SUMO from the E2 enzyme (Ubc9) thioester conjugate to the substrate.
Furthermore, the chemical compound 2-D08 has recently been proven to inhibit E2 SUMO-binding enzyme.
Article An Electrophoretic Mobility Shift Assay Identifies a Mechani...