A mutation in the 530 loop ofEscherichia coli16S ribosomal RNA causes resistance to streptomycin

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A mutation in the 530 loop of Escherichia coli 16S ribosomal RNA causes resistance to streptomycin.

Oligonucleotide-directed mutagenesis was used to introduce an A to C transversion at position 523 in the 16S ribosomal RNA gene of Escherichia coli rrnB operon cloned in plasmid pKK3535. E. coli cells transformed with the mutated plasmid were resistant to streptomycin. The mutated ribosomes isolated from these cells were not stimulated by streptomycin to misread the message in a poly(U)-directe...

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A ribosomal ambiguity mutation in the 530 loop of E. coli 16S rRNA.

A series of base substitution and deletion mutations were constructed in the highly conserved 530 stem and loop region of E. coli 16S rRNA involved in binding of tRNA to the ribosomal A site. Base substitution and deletion of G517 produced significant effects on cell growth rate and translational fidelity, permitting readthrough of UGA, UAG and UAA stop codons as well as stimulating +1 and -1 f...

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Ribosomal resistance to streptomycin and spectinomycin in Neisseria gonorrhoeae.

A cell-free protein synthesizing system was used to study the mechanism of resistance to streptomycin (Str) and spectinomycin (Spc) in laboratory mutants and clinical isolates of Neisseria gonorrhoeae. The 70S ribosomes from sensitive strains were sensitive to the effects of Str and Spc on synthesis directed by several synthetic polynucleotide messengers, whereas 70S ribosomes from resistant st...

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Streptomycin resistance; a genetically recessive mutation.

The spontaneous mutation of bacteria from their normal status of streptomycin sensitivity (S8) to resistance (Sr) is of considerable importance in the clinical application of this chemotherapeutic agent (Miller and Bohnhoff, 1950) as well as in experimental studies of bacterial variation. An important datum hitherto lacking is the dominance relationship of Ss and Sr; that is, whether the presen...

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Erythromycin resistance due to a mutation in a ribosomal RNA operon of Escherichia coli.

There are seven ribosomal RNA operons (rrn operons) in Escherichia coli. A single rrn operon was amplified by use of a multicopy recombinant plasmid containing a complete rrnH operon. rrnH thereby has the potential to contribute a greater fraction of the rRNA found in ribosomes. Erythromycin-resistant mutants were isolated from cells containing the plasmid, and at least one mutation to resistan...

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ژورنال

عنوان ژورنال: Nucleic Acids Research

سال: 1988

ISSN: 0305-1048,1362-4962

DOI: 10.1093/nar/16.20.9631