author_facet Hanke, P D
Fuchs, J A
Hanke, P D
Fuchs, J A
author Hanke, P D
Fuchs, J A
spellingShingle Hanke, P D
Fuchs, J A
Journal of Bacteriology
Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
Molecular Biology
Microbiology
author_sort hanke, p d
spelling Hanke, P D Fuchs, J A 0021-9193 1098-5530 American Society for Microbiology Molecular Biology Microbiology http://dx.doi.org/10.1128/jb.154.3.1040-1045.1983 <jats:p>A RNA-DNA hybridization assay for ribonucleoside diphosphate reductase (RDP reductase) mRNA was used to determine whether control of RDP reductase synthesis in Escherichia coli is at the level of RNA transcription. The correlation observed between the level of RDP reductase enzymatic activity and the rate of RDP reductase mRNA synthesis suggested that the control is at the level of RNA transcription. No increase in RDP reductase enzymatic activity or RDP reductase mRNA was observed during the first 15 min after removal of thymine from a thymine-requiring culture. Thereafter, the rate of RDP reductase mRNA synthesis increased linearly for approximately 75 min before beginning to level off. The addition of thymine to a culture starved for thymine resulted in a decreasing rate of RDP reductase mRNA synthesis. However, 30 min of growth in the presence of thymine was required before the rate of RDP reductase mRNA synthesis dropped to the rate observed in an exponentially growing culture. Inhibition of DNA synthesis caused by shifting a culture of a polC mutant or a dnaB mutant to nonpermissive growth conditions resulted in an increase in the rate of RDP reductase mRNA synthesis similar to that observed for a thymine-starved culture.</jats:p> Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli Journal of Bacteriology
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title Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_unstemmed Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_full Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_fullStr Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_full_unstemmed Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_short Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_sort regulation of ribonucleoside diphosphate reductase mrna synthesis in escherichia coli
topic Molecular Biology
Microbiology
url http://dx.doi.org/10.1128/jb.154.3.1040-1045.1983
publishDate 1983
physical 1040-1045
description <jats:p>A RNA-DNA hybridization assay for ribonucleoside diphosphate reductase (RDP reductase) mRNA was used to determine whether control of RDP reductase synthesis in Escherichia coli is at the level of RNA transcription. The correlation observed between the level of RDP reductase enzymatic activity and the rate of RDP reductase mRNA synthesis suggested that the control is at the level of RNA transcription. No increase in RDP reductase enzymatic activity or RDP reductase mRNA was observed during the first 15 min after removal of thymine from a thymine-requiring culture. Thereafter, the rate of RDP reductase mRNA synthesis increased linearly for approximately 75 min before beginning to level off. The addition of thymine to a culture starved for thymine resulted in a decreasing rate of RDP reductase mRNA synthesis. However, 30 min of growth in the presence of thymine was required before the rate of RDP reductase mRNA synthesis dropped to the rate observed in an exponentially growing culture. Inhibition of DNA synthesis caused by shifting a culture of a polC mutant or a dnaB mutant to nonpermissive growth conditions resulted in an increase in the rate of RDP reductase mRNA synthesis similar to that observed for a thymine-starved culture.</jats:p>
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author Hanke, P D, Fuchs, J A
author_facet Hanke, P D, Fuchs, J A, Hanke, P D, Fuchs, J A
author_sort hanke, p d
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description <jats:p>A RNA-DNA hybridization assay for ribonucleoside diphosphate reductase (RDP reductase) mRNA was used to determine whether control of RDP reductase synthesis in Escherichia coli is at the level of RNA transcription. The correlation observed between the level of RDP reductase enzymatic activity and the rate of RDP reductase mRNA synthesis suggested that the control is at the level of RNA transcription. No increase in RDP reductase enzymatic activity or RDP reductase mRNA was observed during the first 15 min after removal of thymine from a thymine-requiring culture. Thereafter, the rate of RDP reductase mRNA synthesis increased linearly for approximately 75 min before beginning to level off. The addition of thymine to a culture starved for thymine resulted in a decreasing rate of RDP reductase mRNA synthesis. However, 30 min of growth in the presence of thymine was required before the rate of RDP reductase mRNA synthesis dropped to the rate observed in an exponentially growing culture. Inhibition of DNA synthesis caused by shifting a culture of a polC mutant or a dnaB mutant to nonpermissive growth conditions resulted in an increase in the rate of RDP reductase mRNA synthesis similar to that observed for a thymine-starved culture.</jats:p>
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spelling Hanke, P D Fuchs, J A 0021-9193 1098-5530 American Society for Microbiology Molecular Biology Microbiology http://dx.doi.org/10.1128/jb.154.3.1040-1045.1983 <jats:p>A RNA-DNA hybridization assay for ribonucleoside diphosphate reductase (RDP reductase) mRNA was used to determine whether control of RDP reductase synthesis in Escherichia coli is at the level of RNA transcription. The correlation observed between the level of RDP reductase enzymatic activity and the rate of RDP reductase mRNA synthesis suggested that the control is at the level of RNA transcription. No increase in RDP reductase enzymatic activity or RDP reductase mRNA was observed during the first 15 min after removal of thymine from a thymine-requiring culture. Thereafter, the rate of RDP reductase mRNA synthesis increased linearly for approximately 75 min before beginning to level off. The addition of thymine to a culture starved for thymine resulted in a decreasing rate of RDP reductase mRNA synthesis. However, 30 min of growth in the presence of thymine was required before the rate of RDP reductase mRNA synthesis dropped to the rate observed in an exponentially growing culture. Inhibition of DNA synthesis caused by shifting a culture of a polC mutant or a dnaB mutant to nonpermissive growth conditions resulted in an increase in the rate of RDP reductase mRNA synthesis similar to that observed for a thymine-starved culture.</jats:p> Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli Journal of Bacteriology
spellingShingle Hanke, P D, Fuchs, J A, Journal of Bacteriology, Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli, Molecular Biology, Microbiology
title Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_full Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_fullStr Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_full_unstemmed Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_short Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
title_sort regulation of ribonucleoside diphosphate reductase mrna synthesis in escherichia coli
title_unstemmed Regulation of ribonucleoside diphosphate reductase mRNA synthesis in Escherichia coli
topic Molecular Biology, Microbiology
url http://dx.doi.org/10.1128/jb.154.3.1040-1045.1983