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[Loss of adsorptive ability--the reason for inactivation of the RM2 bacteriophage during storage]
Abstract:
The kinetics of bacteriophage PM2 inactivation at storage was compared with the kinetics of bacteriophage adsorption on Alteromonas espejiana BAL-31 host cells. Adsorption ability and infectivity are lost with the same rate at temperatures 4-28 degrees C suggesting the loss of adsorption ability to result in bacteriophage inactivation. At higher temperatures infectivity is lost more rapidly than the ability of adsorption. The single hit kinetics of adsorption ability loss suggests the simple model of independent inactivation of 12 antireceptors located at the tops of icosaedric capsid to be erroneous. At bacteriophage inactivation the major port of protein I, a fragment of antireceptors, is preserved in the capsid composition.
Insights
Bacteriophage PM2 inactivation kinetics were studied. At storage, adsorption loss causes inactivation, but higher temperatures affect infectivity more rapidly, challenging simple inactivation models.
Area of Science:
- Virology
- Microbiology
- Biophysics
Context:
- Bacteriophage PM2 is a model virus for studying inactivation mechanisms.
- Alteromonas espejiana BAL-31 serves as the host for these phage-bacteria interactions.
Purpose:
- To compare the inactivation kinetics of bacteriophage PM2 during storage with its adsorption kinetics onto host cells.
- To elucidate the relationship between adsorption ability and infectivity loss at different temperatures.
Summary:
- At 4-28°C, bacteriophage PM2 loses adsorption ability and infectivity at the same rate, indicating adsorption loss leads to inactivation.
- At higher temperatures, infectivity declines faster than adsorption ability.
- The observed kinetics of adsorption loss contradict a simple model of independent antireceptor inactivation, suggesting a more complex mechanism.
Impact:
- This research provides insights into the mechanisms of bacteriophage inactivation, crucial for understanding viral stability and persistence.
- Findings challenge existing models of viral inactivation, prompting further investigation into the structural and functional integrity of bacteriophages.
- Preservation of major protein I fragments during inactivation suggests their role in maintaining capsid integrity.