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[Detection of components of type D oncornavirus in the mitochondria of HEp-2 cells]
Abstract:
The HEp-2 cell mitochondria were found to harbor electronoptically dense subvirus particles with a byouant density of 1.27-1.28 g/cm3 which formed in the mitochondria de novo (experiments on incubation of isolated mitochondria with 32P). The intramitochondrial localization of proteins of oncornavirus type D was proven by different methods of the antigenic analysis (CFT, immune precipitation, autoradiography). The additional evidence of the participation of mitochondria in biosynthesis of this virus was obtained by the use of inhibitory tests (a different effect of chloramphenicol and cycloheximide). The possible role of mitochondria in biosynthesis of oncornaviruses is discussed.
Insights
Mitochondria in HEp-2 cells were found to generate oncornavirus type D particles de novo. This suggests a novel role for mitochondria in the biosynthesis of these viruses.
Area of Science:
- Cell Biology
- Virology
- Biochemistry
Context:
- Mitochondria are primarily known for energy production.
- The biogenesis of viruses typically involves host cell machinery, but mitochondrial involvement is less understood.
Purpose:
- To investigate the potential role of mitochondria in the de novo synthesis of oncornavirus type D.
- To identify the localization and origin of viral components within mitochondria.
Summary:
- Electron-dense subvirus particles (density 1.27-1.28 g/cm3) were observed forming de novo within HEp-2 cell mitochondria.
- Antigenic analysis confirmed the intramitochondrial presence of oncornavirus type D proteins.
- Inhibitory tests using chloramphenicol and cycloheximide provided further evidence for mitochondrial participation in viral biosynthesis.
Impact:
- Challenges the traditional view of viral replication by highlighting a potential mitochondrial role.
- Opens new avenues for understanding oncornavirus biogenesis and potential therapeutic targets.
- Provides a foundation for further research into organelle-specific viral synthesis.