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A genetic study of apramycin-resistant mutants of Escherichia coli

โœ Scribed by Dr. Branka Vasiljevic; Djordje Fira; Ljubisa Topisirovic

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
329 KB
Volume
33
Category
Article
ISSN
0233-111X

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โœฆ Synopsis

Abstract

The apramycinโ€resistant mutants of E. coli were isolated spontaneously. Mutations, aprA and aprB, conferring resistance to apramycin were located at 72 min on the E. coli genetic map where most of ribosomal genes were mapped. One of the mutants, carrying the aprB mutation, has an altered translational fidelity expressed as severe restriction of amber suppressor activity in vivo. The chromosome location and altered translational fidelity indicate that the apramycinโ€resistant phenotype could be a consequence of an alteration of the ribosomal structure.

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