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Updated: Aug 9, 2026

Enrichment of Bacterial Lipoproteins and Preparation of N-terminal Lipopeptides for Structural Determination by Mass Spectrometry
Published on: May 21, 2018
Development of lipopeptides for inhibiting 20S proteasomes
Nicolas Basse1, David Papapostolou, Maurice Pagano
1Laboratoire d'Enzymologie Moléculaire et Fonctionnelle, FRE2852, CNRS-Université Paris VI, Institut Jacques Monod, T43, 2 Place Jussieu, 75251 Paris Cedex 05, France.
Abstract:
Proteasomes are responsible for the cytoplasmic turnover of the vast majority of proteins including regulatory proteins. We have synthesized lipopeptides a new class of non-covalent inhibitors of the 20S proteasome and assayed their inhibitory capacities. Their ability to inhibit at micromolar concentrations chymotrypsin-like and post-acid activities depends on peptide length (3 or 6 amino acids), sequence (presence of a positively or negatively charged amino acid), and alkyl chain length (C6-C18). These structural features could be varied to selectively inhibit one or more of the three proteasome activities.
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