Three-dimensional visualization of the Autographa californica multiple nucleopolyhedrovirus occlusion-derived virion envelopment process gives new clues as to its mechanism
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou (China)
Baculoviruses produce two virion phenotypes, occlusion-derived virion (ODV) and budded virion (BV). ODV envelopment occurs in the nucleus. Morphogenesis of the ODV has been studied extensively; however, the mechanisms underlying microvesicle formation and ODV envelopment in nuclei remain unclear. In this study, we used electron tomography (ET) together with the conventional electron microscopy to study the envelopment of Autographa californica multiple nucleopolyhedrovirus (AcMNPV) ODV. Our results demonstrate that not only the inner but also the outer nuclear membrane can invaginate and vesiculate into microvesicles and that intranuclear microvesicles are the direct source of the ODV membrane. Five main events in the ODV envelopment process are summarized, from which we propose a model to explain this process. - Highlights: • Both the inner and outer nuclear membranes could invaginate. • Both the inner and outer nuclear membranes could vesiculate into microvesicles. • Five main events in the ODV envelopment process are summarized. • A model is proposed to explain this ODV envelopment.
- OSTI ID:
- 22470154
- Journal Information:
- Virology, Journal Name: Virology Vol. 476; ISSN VIRLAX; ISSN 0042-6822
- Country of Publication:
- United States
- Language:
- English
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