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. 1978 Dec;136(3):983–993.

Suppression of Temperature-Sensitive Sporulation of a Bacillus subtilis Elongation Factor G Mutant by RNA Polymerase Mutations

Hirohiko Hirochika 1, Yasuo Kobayashi 1
PMCID: PMC218534  PMID: 102638

Abstract

A class of rifampin-resistant (rfm) mutations of Bacillus subtilis suppresses the temperature-sensitive sporulation of a fusidic acid-resistant mutant, FUS426, which has an altered elongation factor G. The rfm mutation suppressed only the sporulation defect caused by the elongation factor G mutation, but could not suppress other types of induced sporulation defects. Genetic and biochemical analyses showed that the sporulation suppression by the rfm mutation was caused by a single mutation in RNA polymerase. After the early sporulation phase, the apparent rate of RNA synthesis of FUS426, measured by [3H]uracil or [3H]uridine incorporation into RNA, became lower than that of the wild-type strain, and this decrease was reversed by the rfm mutation. However, when the total rate of RNA synthesis of FUS426 was calculated by measuring the specific activity of [3H]UTP and [3H]CTP, it was higher than that of the rfm mutant, RIF122FUS426. The possible mechanism of the functional interaction between elongation factor G and RNA polymerase during sporulation is discussed.

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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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