Article ; Online: Proteomic Ligandability Maps of Spirocycle Acrylamide Stereoprobes Identify Covalent ERCC3 Degraders.
Journal of the American Chemical Society
2024 Volume 146, Issue 15, Page(s) 10393–10406
Abstract: Covalent chemistry coupled with activity-based protein profiling (ABPP) offers a versatile way to discover ligands for proteins in native biological systems. Here, we describe a set of stereo- and regiochemically defined spirocycle acrylamides and the ... ...
Abstract | Covalent chemistry coupled with activity-based protein profiling (ABPP) offers a versatile way to discover ligands for proteins in native biological systems. Here, we describe a set of stereo- and regiochemically defined spirocycle acrylamides and the analysis of these electrophilic "stereoprobes" in human cancer cells by cysteine-directed ABPP. Despite showing attenuated reactivity compared to structurally related azetidine acrylamide stereoprobes, the spirocycle acrylamides preferentially liganded specific cysteines on diverse protein classes. One compound termed ZL-12A promoted the degradation of the TFIIH helicase ERCC3. Interestingly, ZL-12A reacts with the same cysteine (C342) in ERCC3 as the natural product triptolide, which did not lead to ERCC3 degradation but instead causes collateral loss of RNA polymerases. ZL-12A and triptolide cross-antagonized one another's protein degradation profiles. Finally, we provide evidence that the antihypertension drug spironolactone─previously found to promote ERCC3 degradation through an enigmatic mechanism─also reacts with ERCC3_C342. Our findings thus describe monofunctional degraders of ERCC3 and highlight how covalent ligands targeting the same cysteine can produce strikingly different functional outcomes. |
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MeSH term(s) | Humans ; Acrylamide ; Cysteine/chemistry ; Proteomics ; Diterpenes ; Epoxy Compounds ; Phenanthrenes |
Chemical Substances | triptolide (19ALD1S53J) ; Acrylamide (20R035KLCI) ; Cysteine (K848JZ4886) ; Diterpenes ; Epoxy Compounds ; Phenanthrenes |
Language | English |
Publishing date | 2024-04-03 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 3155-0 |
ISSN | 1520-5126 ; 0002-7863 |
ISSN (online) | 1520-5126 |
ISSN | 0002-7863 |
DOI | 10.1021/jacs.3c13448 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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