SUMO Activating Enzyme E1 (SAE1/UBA2) Proteins and Enzymes

Small Ubiquitin-like Modifier (SUMO) Activating Enzyme Subunit 1 (SAE1) is the highly conserved human ortholog of yeast Ubiquitin-activating enzyme E1-like (UBA2). These SUMO-activating (E1) enzymes are critical for the enzymatic attachment of SUMO molecules to a target protein by a post-translational modification process termed SUMOylation. The ATP-dependent E1 enzyme charges the SUMO by forming a high-energy thiol ester intermediate which is transferred to the UBE2I/Ubc9 SUMO-conjugating ...