Nucleic Acids Research, 1985, Vol. 13, No. 19 7095-7106
© 1985
Articles |
Nucleotide sequence of the transposon Tn7 gene encoding an aminoglycoside-modifying enzyme, 3''(9)-O-nucleotidyltransferase
Wellcome Research Laboratories, Research Triangle Park NC 27709, USA
Received May 6, 1985. Revised September 5, 1985. Accepted September 5, 1985.
The nucleotide sequence of a transposon Tn7 DNA fragment encoding a 3''(9)-O-nucleotidyltransferase, an aminoglycoside-modifying enzyme, which mediates bacterial resistance to spectinomycin and Streptomycin, was determined. The aadA structural gene was 786 bases long and predicted a polypeptide of 262 amino acids with a calculated molecular weight of 29,207. Comparison of the DNA sequences of Tn7 and plasmid R538-1 indicated that their aadA genes were nearly identical. Comparison of the polypeptides predicted by the aadA genes of Tn7 and Tn554 Indicated that the genes were related.
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