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. 1970 Jun;5(6):718–725. doi: 10.1128/jvi.5.6.718-725.1970

Effect of the “Ribonucleic Acid Control” Locus in Escherichia coli on T4 Bacteriophage-Specific Ribonucleic Acid Synthesis

Ola Sköld 1
PMCID: PMC376066  PMID: 4914097

Abstract

Amino acid control of ribonucleic acid (RNA) synthesis in bacteria is known to be governed genetically by the rel locus. We investigated whether the rel gene of the host would also exert its effect on the regulation of phage-specific RNA synthesis in T4 phage-infected Escherichia coli cells. Since T-even phage infection completely shuts off host macromolecular synthesis, phage RNA synthesis could be followed specifically by the cumulative incorporation of radioactivity from labeled precursors into RNA of infected cells. Labeled uracil was shown to accumulate in phage-specific RNA for 30 to 35 min after infection, a phenomenon which probably reflects an expansion of the labile phage-RNA pool. Amino acid starvation was effected by the use of auxotrophic bacterial strains or thienylalanine. The latter substance is an amino acid analogue which induces a chemical auxotrophy by inhibiting the biosynthesis of phenylalanine, tyrosine, and tryptophan. Phage RNA synthesis was strictly dependent on the presence of amino acids, whereas phage deoxyribonucleic acid synthesis was not. By the use of several pairs of bacterial strains which were isogenic except for the rel gene, it was demonstrated that amino acid dependence was related to the allelic state of this gene. If the rel gene was mutated, amino acid starvation did not restrict phage RNA synthesis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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