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. 1979 Dec;140(3):786–797. doi: 10.1128/jb.140.3.786-797.1979

Requirement for peptidoglycan synthesis during sporulation of Bacillus subtilis.

B N Dancer
PMCID: PMC216716  PMID: 118156

Abstract

Cultures of Bacillus subtilis were treated during sporulation with antibiotics (bacitracin and vancomycin) that affect peptidoglycan synthesis. The cells were resistant to the effects of the antibiotics only when the drugs were added about 2 h after the beginning of sporulation. This was about 1 h later than the escape time of a temperature-sensitive sporulation mutant that is unable to complete prespore septation. Similar experiments were done with a mutant temperature sensitive for peptidoglycan synthesis. This showed an escape curve similar to that shown by the antibiotics. When sporulating cells were treated with antibiotics, they produced alkaline phosphatase earlier than normal. Enzyme production was unaffected by inhibition of deoxyribonucleic acid synthesis but was inhibited by chloramphenicol. Sporulation mutants that are unable to make alkaline phosphatase under normal conditions were able to make it in the presence of bacitracin. The alkaline phosphatase made under these conditions was under "sporulation-type" control since its synthesis was repressible by casein hydrolysate and unaffected by inorganic phosphate. When cells were treated with bacitracin in the growth medium as well as in the sporulation medium, alkaline phosphatase synthesis was at the same level as in an untreated control. A number of other antibiotics and surfactants were tested for the ability to cause premature production of the phosphatase of those tested, only taurodeoxycholate whowed this behavior. Moreover, incubation of cells with taurodeoxycholate in the growth medium as well as in the sporulation medium prevented premature enzyme production.

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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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