Lysine acylation using conjugating enzymes for site-specific modification and ubiquitination of recombinant proteins
- Journal Article
Enzymes are powerful tools for protein labelling due to their specificity and mild reaction conditions. Many protocols, however, are restricted to modifications at protein termini, rely on non-peptidic metabolites or require large recognition domains. Here we report a chemoenzymatic method, which we call lysine acylation using conjugating enzymes (LACE), to site-specifically modify folded proteins at internal lysine residues. LACE relies on a minimal genetically encoded tag (four residues) recognized by the E2 small ubiquitin-like modifier-conjugating enzyme Ubc9, and peptide or protein thioesters. Together, this approach obviates the need for E1 and E3 enzymes, enabling isopeptide formation with just Ubc9 in a programmable manner. We demonstrate the utility of LACE by the site-specific attachment of biochemical probes, one-pot dual-labelling in combination with sortase, and the conjugation of wild-type ubiquitin and ISG15 to recombinant proteins. Show more
Journal / seriesNature Chemistry
Pages / Article No.
PublisherNature Publishing Group
Organisational unit03861 - Bode, Jeffrey W. / Bode, Jeffrey W.
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Is part of: https://doi.org/10.3929/ethz-b-000475966
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