Cloning and Expression of Class A β-Lactamase Gene blaA BPS in Burkholderia pseudomallei

Abstract
The β-lactamase gene blaA BPS in Burkholderia pseudomallei was cloned and expressed in Escherichia coli . BPS-1 is a cephalosporinase with an isoelectric point of 7.7. Sequence analysis of BPS-1 revealed conserved motifs typical of class A β-lactamases and a relationship to the PenA (in B. cepacia ) and BlaI (in Yersinia enterocolitica ) lineages.