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. 1985 Aug;28(2):227–234. doi: 10.1128/aac.28.2.227

Genesis of a complex transposon encoding the OXA-1 (type II) beta-lactamase gene.

M Tanaka, K Matsushita, T Yamamoto
PMCID: PMC180224  PMID: 3010839

Abstract

Plasmid R753-1-encoded resistance to ampicillin (by production of OXA-1 [type II] beta-lactamase), streptomycin, and sulfonamide was analyzed functionally and physically. The OXA-1 beta-lactamase gene on R753-1 could not transpose, whereas on some plasmids this gene was capable of transposition as part of transposon Tn2603. By using the nontransposable gene on R753-1 with Tn21 on a separate plasmid, we observed the genesis of a complex transposon with a structure similar to that of Tn2603. This finding confirms our previous hypothesis that Tn2603 has evolved directly from Tn21 through acquisition of the OXA-1 beta-lactamase gene by substitution of DNA segments. Furthermore, the mechanism of mobilization of pACYC184 derivatives by RecA-dependent homologous recombination was demonstrated.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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