Sentrin-specific protease 3 (SENP3, MEROPS identifier C48.003) is an isopeptidase that releases SUMO2 and SUMO3 monomers from sumoylated substrates by hydrolysing the isopeptide bond []. SENP3 is a cysteine peptidase with a fold similar to that of adenain, and has the catalytic triad His, Asp, Cys, the reverse of the order in papain. Among the proteins that are deconjugated by SENP3 are MEF2D [], CDCA8 [], EP300 [], and nucleophosmin []. SENP3 is a component of the 5FMC []and MLL1/MLL complexes [].
