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Supercoiled DNA of nuclear polyhedrosis virus of Galleria mellonella L
Archives of Virology
|January 1, 1977
Abstract:
Supercoiled infectious DNA was isolated from nuclear polyhedrosis virus infecting great wax moth Galleria mellonella L.) Covalently closed DNA molecules constitute approximately 10--30 per cent in our preparations. These molecules dissappear during storage. Electron micrographs of supercoiled and open circular molecules are presented. Length of the open rings is about 50--52 micron. Infectivity of different DNA forms is discussed.
Insights
Infectious DNA from nuclear polyhedrosis virus in wax moths includes supercoiled molecules that degrade over time. Researchers studied these DNA forms and their infectivity.
Area of Science:
- Virology
- Molecular Biology
- Entomology
Background:
- Nuclear polyhedrosis virus (NPV) infects insects, including the great wax moth (Galleria mellonella).
- Viral DNA structure is crucial for infectivity and replication.
Purpose of the Study:
- To isolate and characterize supercoiled DNA from NPV infecting Galleria mellonella.
- To investigate the stability and infectivity of different DNA forms.
Main Methods:
- Isolation of supercoiled DNA from infected wax moth larvae.
- Electron microscopy to visualize DNA structures.
- Assessment of DNA infectivity.
Main Results:
- Supercoiled, covalently closed DNA molecules comprised 10-30% of preparations.
- These supercoiled molecules were observed to degrade during storage.
- Electron microscopy revealed supercoiled and open circular DNA forms.
- Open circular DNA molecules measured approximately 50-52 microns in length.
Conclusions:
- Nuclear polyhedrosis virus preparations contain infectious supercoiled DNA.
- The stability of these supercoiled DNA forms is limited.
- Further research is needed to understand the implications of DNA degradation on viral infectivity.