The Integron In1 In Plasmid R46 Includes 2 Copies Of The Oxa2 Gene Cassette

Publisher:
Academic Press Inc Jnl-Comp Subscriptions
Publication Type:
Journal Article
Citation:
Plasmid, 1992, 28 (3), pp. 225 - 234
Issue Date:
1992-01
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The sequence of the insert region of the integron In1 found in the IncN plasmid R46 was completed. The insert region is 2929 bases long and includes four gene cassettes, two of which are identical copies of the oxa2 gene cassette flanking an aadA1 cassette. The fourth cassette encodes an open reading frame orfD. From comparison of these data with published maps and sequences it is argued that the integrons found in the IncN plasmids pCU1 and R1767 and in the transposon Tn2410 are closely related to In1 from R46. Both site-specific gene insertion and recA-dependent recombination are likely to have contributed to the evolution of these integrons.
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