Identification of additional genes on transposon Tn10: tetC and tetD

Abstract

Two genes (tetC and tetD) were identified and located on transposon Tn10 between gene tetA and insertion sequence IS10(r). Genes tetC and tetD encode proteins of apparent subunit molecular weights of 23,000 and 18,000, respectively. The TetD protein was found to be membrane associated. Tetracycline resistance levels promoted by transposon Tn10 were found to be unaffected in Escherichia coli K-12 when mutants lacking tetC or tetC and tetD were tested.