Summary
A novel spontaneous temperature sensitive mutant of Escherichia coli, which stops synthesizing stable RNA and some proteins immediately upon temperature shift from 30° C to 42° C, is described. Stable RNA species are not preferentially degraded in the mutant at the nonpermissive temperature. The guanine polyphosphate compounds, ppGpp (MS1) and pppGpp (MS2), are not produced at 42° C. The mutant strain does not grow at 42° C in either broth or defined minimal medium supplemented with any of a variety of carbon sources. The temperature sensitive mutation in this strain maps between dap A, E and pts I and defines a new locus affecting RNA synthesis in E. coli.
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Liebke, H.H., Speyer, J.F. A new gene in E. coli RNA synthesis. Molec Gen Genet 189, 314–320 (1983). https://doi.org/10.1007/BF00337823
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DOI: https://doi.org/10.1007/BF00337823