Studying the active-site loop movement of the Sao Paolo metallo-beta-lactamase-1
Brem, J., Struwe, W.B., Rydzik, A.M., Tarhonskaya, H., Pfeffer, I., Flashman, E., van Berkel, S.S., Spencer, J., Claridge, T.D., McDonough, M.A., Benesch, J.L., Schofield, C.J.(2015) Chem Sci 6: 956-963
- PubMed: 25717359 
- DOI: https://doi.org/10.1039/c4sc01752h
- Primary Citation of Related Structures:  
4BP0 - PubMed Abstract: 
Metallo-β-lactamases (MBLs) catalyse the hydrolysis of almost all β-lactam antibiotics. We report biophysical and kinetic studies on the São Paulo MBL (SPM-1), which reveal its Zn(ii) ion usage and mechanism as characteristic of the clinically important di-Zn(ii) dependent B1 MBL subfamily. Biophysical analyses employing crystallography, dynamic 19 F NMR and ion mobility mass spectrometry, however, reveal that SPM-1 possesses loop and mobile element regions characteristic of the B2 MBLs. These include a mobile α3 region which is important in catalysis and determining inhibitor selectivity. SPM-1 thus appears to be a hybrid B1/B2 MBL. The results have implications for MBL evolution and inhibitor design.
Organizational Affiliation: 
Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK . Email: christopher.schofield@chem.ox.ac.uk.