Facile synthesis of covalent probes to capture enzymatic intermediates during E1 enzyme catalysis†
Abstract
We report a facile synthetic strategy to prepare UBL–AMP electrophilic probes that form a covalent bond with the catalytic cysteine of cognate E1s, mimicking the tetrahedral intermediate of the E1–UBL–AMP complex. These probes enable the structural and biochemical study of both canonical- and non-canonical E1s.