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[Fluorescence microscopic study of the microorganisms treated with chaotropic agents]
Mikrobiologiia
|October 11, 2005
Summary
Chaotropic agents and detergents cause DNA to relocate from the cytoplasm to the ectoplasm in yeast and bacteria. High-temperature treatment disperses this released DNA within the ectoplasm.
Area of Science:
- Microbiology
- Cell Biology
Context:
- Investigates the effects of chaotropic agents and detergents on microbial cell structures.
- Utilizes fluorescence microscopy and nucleic acid-specific fluorochromes for cellular analysis.
Purpose:
- To examine the subcellular localization of DNA in Saccharomyces cerevisiae, Pichia pastoris, Micrococcus luteus, Bacillus subtilis, and Anaerobacter polyendosporus after treatment.
- To understand the impact of chaotropic agents and detergents on DNA distribution within microbial cells.
Summary:
- Treatment with chaotropic agents (guanidine hydrochloride, guanidine thiocyanate) and detergents at 37°C causes DNA to release from the cytoplasm and aggregate in the ectoplasm of yeast and bacteria.
- Further treatment at 100°C with chaotropic agents results in a diffuse distribution of DNA throughout the ectoplasm.
- Polymerase Chain Reaction (PCR) and endospore studies reveal DNA release and localization within B. subtilis endospores.
Impact:
- Provides insights into the structural changes and DNA dynamics in microbial cells under chemical stress.
- Corroborates findings from previous electron microscopy studies on cell ultrastructure.
- Highlights the permeability of Bacillus subtilis endospores to fluorochromes after treatment.
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