期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 25, 期 51, 页码 11837-11841出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201902529
关键词
antibiotics; beta-lactamase; carbamylation; carbapenemase; NMR spectroscopy
资金
- Medical Research Council (MRC)
- Tres Cantos Open Lab Foundation [TC 241]
- Wellcome Trust
- BBSRC [BB/R000344/1] Funding Source: UKRI
- MRC [MR/L007665/1, MR/N002679/1] Funding Source: UKRI
Bacterial production of beta-lactamases with carbapenemase activity is a global health threat. The active sites of class D carbapenemases such as OXA-48, which is of major clinical importance, uniquely contain a carbamylated lysine residue which is essential for catalysis. Although there is significant interest in characterizing this post-translational modification, and it is a promising inhibition target, protein carbamylation is challenging to monitor in solution. We report the use of F-19 NMR spectroscopy to monitor the carbamylation state of F-19-labelled OXA-48. This method was used to investigate the interactions of OXA-48 with clinically used serine beta-lactamase inhibitors, including avibactam and vaborbactam. Crystallographic studies on F-19-labelled OXA-48 provide a structural rationale for the sensitivity of the F-19 label to active site interactions. The overall results demonstrate the use of F-19 NMR to monitor reversible covalent post-translational modifications.
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