Cloning and nucleotide sequence of the<i>mphB</i>gene for macrolide 2â²-phosphotransferase II in<i>Escherichia coli</i>

Abstract

Macrolide 2'-phosphotransferase II [MPH(2')II] inactivates macrolide antibiotics. The mphB gene for MPH(2')II was cloned from Escherichia coli and sequenced. Analysis of the nucleotide sequence indicated that mphB encoded a protein of 302 amino acids with a molecular mass of 34483 Da. The carboxy terminal region of the deduced protein contained a sequence that resembled a conserved functional domain in aminoglycoside phosphotransferases.