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. 1993 Sep;37(9):2037–2041. doi: 10.1128/aac.37.9.2037

Sequencing of a tet(Q) gene isolated from Bacteroides fragilis 1126.

G Lépine 1, J M Lacroix 1, C B Walker 1, A Progulske-Fox 1
PMCID: PMC188119  PMID: 7916585

Abstract

Recently, Tet Q, a tetracycline resistance determinant that confers resistance by a ribosome protection mechanism, was described and added to the two previously described classes, Tet M and Tet O. The first representative of this class, tetA(Q)1, was isolated from Bacteroides thetaiotaomicron DOT. We report the sequencing of a gene isolated from B. fragilis 1126 which also confers tetracycline resistance. Because of its high degree of identity (97%) with the tetA(Q)1 gene, we defined it as tetA(Q)2. MIC studies revealed that tetA(Q)2 provides a low level of resistance to tetracycline when cloned into Escherichia coli. The extensive homology between tetA(Q)1 and tetA(Q)2 supports the idea of a recent horizontal transfer of tet(Q) genes among Bacteroides spp.

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Selected References

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