Viral Nucleoprotein Cleavage
Viral Nucleoprotein Cleavage - Related Videos
03:34
Assessing Caspase-Mediated Cleavage of Viral and Host Proteins in Virus-Infected Cells
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2025
The video demonstrates a method to assess caspase-mediated protein cleavage in virus-infected cells. Post-viral infection, caspases get activated and degrade various host cellular proteins and viral nucleoproteins while specific caspase inhibitors prevent this degradation, as confirmed by western blotting.
01:33
Cleavage and Blastulation
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2019
After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller. Zygotic Genome Activation At the beginning of embryogenesis, maternal mRNAs control development. However, by the eight-cell stage of cleavage, embryonic genes become activated in a process called...
02:23
Visualizing the Effect of pH on Solubilization of the Influenza A Viral Core
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2026
Source: Stauffer, S. et al., In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation. J. Vis. Exp. (2016)This video demonstrates the effect of pH on the solubilization of influenza A viral cores. Gel electrophoresis and protein staining reveal the progressive disassembly of the core structure under acidic conditions.
07:33
Physical Properties Of Minerals I: Crystals and Cleavage
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2023
Source: Laboratory of Alan Lester - University of Colorado Boulder The physical properties of minerals comprise various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. Each of these properties are mineral-specific, and they are fundamentally related to a particular mineral’s chemical make-up and atomic structure. This experiment examines two properties that stem primarily from symmetric repetition of...
02:36
In Vitro Reconstitution and Purification of Viral Nucleocapsid-Like Particles
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2026
Source: Gao, Y., et al. Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus. J. Vis. Exp. (2021)The video demonstrates the in vitro assembly of virus-specific nucleocapsids from a purified RNA-free nucleoprotein–phosphoprotein complex, their purification by size exclusion chromatography, and validation of full-length viral RNA within the assembled particles.
FAQs
Cleavage can remodel nucleoprotein structure and alter how the protein binds RNA, forms oligomers, or moves within the infected cell. Because these properties organize viral genetic material, processing may change the accessibility or arrangement of the genome without requiring a change in its sequence. The resulting effects can influence replication, particle assembly, or uncoating.
The source of the protease connects cleavage to different parts of the infection process. A viral protease may coordinate processing with viral replication or particle formation, whereas a host protease can link nucleoprotein processing to cellular conditions or host-pathogen interactions. Distinguishing these sources helps researchers identify which molecular activities support infection and which may be suitable antiviral targets.
The same processing event may have different effects depending on when it occurs. Early cleavage could influence intracellular trafficking or uncoating, while processing later in infection might affect genome replication or particle assembly. Interpreting cleavage therefore requires relating the modification to infection stage rather than treating it as an isolated structural change.
Processing can modify nucleoprotein interactions with cellular proteins and change how viral material is presented to immune defenses. These effects may influence recognition by innate defenses, adaptive immune responses, or both, depending on the virus and the altered nucleoprotein properties. Studying the cleavage event can therefore connect viral replication mechanisms with host immune detection.
Studies can examine how processing affects nucleoprotein structure, RNA binding, oligomerization, intracellular trafficking, and interactions with viral or cellular proteins. These features provide a framework for connecting cleavage to replication, assembly, uncoating, and immune recognition. Comparing the affected functions across infection stages can clarify whether processing supports one phase of infection or several.
Cleavage-sensitive viral proteins can reveal whether proteolytic processing is necessary for important infection-related outcomes. Protease inhibitors provide a complementary strategy for evaluating the contribution of the responsible protease. Together, these approaches can help define viral replication mechanisms, characterize host-pathogen interactions, and assess whether blocking cleavage represents a promising antiviral strategy.