Abstract
Three classes of nonidentical streptomycin-resistant mutations were distinguished in Escherichia coli by their effect on the efficiency of suppression by an amber suppressor gene, sup E. The first class of mutation caused a strong restriction in efficiency of suppression of an amber codon in various cistrons of phage lambda and in an alkaline phosphatase structural gene of E. coli. The second class caused weak restriction, and the third class caused no restriction. The restrictive effect of the streptomycin resistance mutation of the first class on the sup E gene was reduced by addition of streptomycin. This mutation had little effect on efficiencies of suppression by amber suppressor genes sup D and sup F. Analyses on the alkaline phosphatase formed in the suppressor strain indicated that mutation to restrictive streptomycin resistance causes a reduction in translation of the amber codon in the alkaline phosphatase structural gene.
MeSH Terms
Alkaline Phosphatase/analysis,biosynthesis
Carbon Isotopes
Cell-Free System
Chromatography
Coliphages
Drug Resistance, Microbial
Electrophoresis, Disc
Escherichia coli/drug effects
Genes
Genetics, Microbial
Lysogeny
Molecular Biology
Mutation
Proline/metabolism
Streptomycin/pharmacology
Suppression, Genetic
Chemicals
Carbon Isotopes
Proline
Alkaline Phosphatase
Streptomycin
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Otsuji N
Aono H
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23 references, click to expand
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