1.
Antimicrob Agents Chemother
; 56(7): 4005-8, 2012 Jul.
Artigo
em Inglês
| MEDLINE
| ID: mdl-22564834
RESUMO
We describe a deletion mutation in a class A ß-lactamase, PenA, of Burkholderia thailandensis that extended the substrate spectrum of the enzyme to include ceftazidime. Glu168del was located in a functional domain called the omega loop causing expansion of the space in the loop, which in turn increased flexibility at the active site. This deletion mutation represents a rare but significant alternative mechanical path to substrate spectrum extension in PenA besides more common substitution mutations.