New mobile gene cassettes containing an aminoglycoside resistance gene, aacA7, and a chloramphenicol resistance gene, catB3, in an integron in pBWH301
- American Society for Microbiology
- Publication Type:
- Journal Article
- Antimicrobial agents and chemotherapy, 1995, 39 (3), pp. 686 - 693
- Issue Date:
The multidrug resistance plasmid pBWH301 was shown to contain a sull- associated integron with five inserted gene cassettes, aacA7-catB3-aadB- oxa2-orfD, all of which can be mobilized by the integron-encoded DNA integrase. The aadB, oxa2, and orfD cassettes are identical to known cassettes. The aacA7 gene encodes a protein that is a member of one of the three known families of aminoglycoside acetyltransferases classified as AAC(6')-I. The chloramphenicol acetyltransferase encoded by the catB3 gene is closely related to members of a recently identified family of chloramphenicol acetyltransferases. The catB3 gene displays a relatively high degree of sequence identity to a chromosomally located open reading frame in Pseudomonas aeruginosa, and this may represent evidence for the acquisition by a cassette of a chromosomal gene.
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