Functional characterization of Tn1331 gene cassettes.

ABSTRACT:

Objectives

The transposon Tn1331 possesses a region including three antibiotic resistance genes with the structure aac(6')-Ib-attC-aadA1-attI1*-bla(OXA-9)-attC, which potentially includes four gene cassettes. Experimental data on the mobility of fusion cassettes as well as those on mobility of cassettes in a genetic environment such as Tn1331, which lacks an integrase gene, are limited. Therefore, experiments using pJHCMW1, a plasmid harbouring this transposon, in the presence of IntI1 supplied in trans were carried out to define which cassettes are mobile in vivo.

Methods

In vivo excision of resistance genes was investigated in Escherichia coli cells harbouring pJHCMW1 and in a recombinant clone that included the intI1 gene under the control of the P(tac) promoter. Plasmid

SUBMITTER: Ramirez MS 

PROVIDER: S-EPMC2536708 | biostudies-literature | 2008 Oct

REPOSITORIES: biostudies-literature