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FEMS Microbiol Lett. 2000 Nov 15;192(2):175-8.

A transposon carrying the gene mphB for macrolide 2'-phosphotransferase II.

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Department of Microbiology, School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, 192-0392, Tokyo, Japan.


The mphB gene for macrolide 2'-phosphotransferase II is located on two plasmids, pTZ3721 and pTZ3723, in Escherichia coli BM2506. We examined translocation of mphB that originated from pTZ3721. The transposable element carrying mphB is 39 kb long and has a Tn21-like transposition module at one end and a Tn1721-like transposition module at other. The structure of the transposition modules of this element resembles that of Tn2610. However, the gene arrangement of the internal region on the transposon carrying mphB was reverse to that of Tn2610. The nucleotide sequences of both terminal regions suggested that the inversion of the DNA fragment occurred between the res sites by resolvase-mediated recombination.

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