Substrate Spectrum Extension of PenA in Burkholderia thailandensis with a Single Amino Acid Deletion, Glu168del

作者：Yi Hyojeong; Kim Karan; Cho Kwang Hwi; Jung Oksung; Kim Heenam Stanley^*

来源：Antimicrobial Agents and Chemotherapy, 2012, 56(7): 4005-4008.

DOI：10.1128/AAC.00598-12

We describe a deletion mutation in a class A beta-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.

• 出版日期2012-7