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[Resistance to its own antibiotic nigericin and macromolecular synthesis in Streptomyces hygroscopicus 155]
Abstract:
The influence of nigericin (nandavir) on the organism producing it (Streptomyces hygroscopicus 155) was studied with respect to the synthesis of protein, RNA and DNA. The resistance of the mycelium of different ages to the exogenic antibiotic was investigated. Exogenic nigericin had a more marked inhibitory effect on the macromolecular synthesis in a nonproductive variant of the strain. The antibiotic sensitivity of the mycelium in both the variants (productive and nonproductive) depended on the culture age. It was suggested that there were not less than two mechanisms of the protection from the own antibiotic in the organism.
Insights
Nigericin (nandavir) impacts Streptomyces hygroscopicus macromolecular synthesis, with greater inhibition in nonproductive variants. Organismal protection mechanisms against this antibiotic are age-dependent and likely involve multiple pathways.
Area of Science:
- Microbiology
- Molecular Biology
- Biochemistry
Context:
- Investigates the self-resistance mechanisms of Streptomyces hygroscopicus, an antibiotic-producing bacterium.
- Focuses on the effects of nigericin (nandavir), an antibiotic produced by the organism itself.
- Examines the influence of the antibiotic on the producing organism's cellular processes.
Purpose:
- To understand how Streptomyces hygroscopicus synthesizes protein, RNA, and DNA under the influence of nigericin.
- To determine the age-dependent resistance of the bacterial mycelium to exogenic nigericin.
- To elucidate the protective mechanisms employed by the organism against its own antibiotic.
Summary:
- Nigericin exhibited a more pronounced inhibitory effect on macromolecular synthesis (protein, RNA, DNA) in a nonproductive variant of Streptomyces hygroscopicus.
- The sensitivity of the bacterial mycelium to exogenic nigericin was found to be dependent on the age of the culture in both productive and nonproductive variants.
- The study suggests the existence of at least two distinct mechanisms by which the organism protects itself from nigericin.
Impact:
- Provides insights into bacterial self-resistance mechanisms against antibiotics.
- Contributes to understanding the complex interactions between antibiotic-producing microorganisms and their metabolites.
- Informs potential strategies for optimizing antibiotic production or developing novel antimicrobial agents.