A Triple Mutant in the Omega-loop of TEM-1 beta-Lactamase Changes the Substrate Profile via a Large Conformational Change and an Altered General Base for Catalysis.
Stojanoski, V., Chow, D.C., Hu, L., Sankaran, B., Gilbert, H.F., Prasad, B.V., Palzkill, T.(2015) J Biol Chem 290: 10382-10394
- PubMed: 25713062 
- DOI: 10.1074/jbc.M114.633438
- Primary Citation of Related Structures:  
4RVA, 4RX2, 4RX3 - PubMed Abstract: 
β-Lactamases are bacterial enzymes that hydrolyze β-lactam antibiotics. TEM-1 is a prevalent plasmid-encoded β-lactamase in Gram-negative bacteria that efficiently catalyzes the hydrolysis of penicillins and early cephalosporins but not oxyimino-cephalosporins ...