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Thermosensitive Bacillus subtilis mutants which lyse at the non-permissive temperature
1Institut de Génétique et de Biologie Microbiennes, Lausanne, Switzerland.
Journal of General Microbiology
|May 1, 1987
Summary
Researchers identified 33 thermosensitive lysis mutations in Bacillus subtilis, mapping them to eight linkage groups. Most mutations impact peptidoglycan synthesis, crucial for cell wall integrity.
Area of Science:
- Microbiology
- Bacterial Genetics
- Cell Wall Synthesis
Background:
- Thermosensitive mutants are valuable tools for studying essential genes.
- Bacillus subtilis is a model organism for bacterial genetics and cell wall research.
Purpose of the Study:
- To identify and characterize thermosensitive lysis mutations in Bacillus subtilis.
- To understand the genetic basis of cell lysis in bacteria.
Main Methods:
- Screening of 655 thermosensitive mutants for lysis at non-permissive temperatures.
- Genetic mapping of identified mutations using bacterial transformation.
- Analysis of peptidoglycan synthesis kinetics via N-acetyl-D-[1-14C]glucosamine incorporation.
Main Results:
- Thirty-three lysis mutations were identified and assigned to eight linkage groups (lssA-lssH).
- Mutations were mapped to four distinct chromosomal regions.
- Groups A, B, C, D, and F showed deficiencies in peptidoglycan synthesis.
- Group G exhibited cell wall anomalies.
Conclusions:
- Thermosensitive lysis mutations in Bacillus subtilis primarily affect genes involved in peptidoglycan synthesis.
- These mutations can lead to cell lysis, potentially through prophage induction.