Capsid Integrity
Capsid Integrity - Related Videos
12:57
Alternative In Vitro Methods for the Determination of Viral Capsid Structural Integrity
0 Views •
Cited by 6 •
2017
Routine detection methods utilizing viral genome amplification are limited by their inability to discriminate infectious from non-infectious particles. The purpose of this article is to provide detailed protocols for alternative methods to aid in discrimination of infectious norovirus particles using aptamer binding, dynamic light scattering, and transmission electron microscopy.
03:24
Visualizing Heat-Treated Viral Capsids Using Transmission Electron Microscopy
0 Views •
2026
Source: Moore, M. D., et al. Alternative In Vitro Methods for the Determination of Viral Capsid Structural Integrity. J. Vis. Exp.(2017).This video demonstrates how purified viral capsids are heat-treated, prepared, and imaged using transmission electron microscopy (TEM) to reveal structural changes and heat-induced damage.
07:24
In Vitro Disassembly of Influenza A Virus Capsids by Gradient Centrifugation
0 Views •
Cited by 4 •
2016
Disassembly of influenza A virus cores during virus entry into host cells is a multistep process. We describe an in vitro method to analyze the early stages of viral uncoating. In this approach, velocity gradient centrifugation is used to biochemically dissect the steps that initiate uncoating under defined conditions.
12:38
Structure of HIV-1 Capsid Assemblies by Cryo-electron Microscopy and Iterative Helical Real-space Reconstruction
0 Views •
Cited by 8 •
2011
This article describes a method to obtain a three-dimensional (3D) structure of helically assembled molecules using cryo-electron microscopy. In this protocol, we use HIV-1 capsid assemblies to illustrate the detailed 3D reconstruction procedure for achieving a density map by the iterative helical real-space reconstruction method.
13:36
Utilizing the Antigen Capsid-Incorporation Strategy for the Development of Adenovirus Serotype 5-Vectored Vaccine Approaches
0 Views •
Cited by 1 •
2015
Here, we present a protocol to generate a proof-of-principle divalent adenovirus type 5 (Ad5) vector Ad5/H5-HVR1-KWAS-HVR5-His6 by utilizing the Antigen Capsid-Incorporation strategy. This vector was demonstrated to exhibit qualitative fitness, the capability to escape Ad5-positive sera in vitro, and the antigenicity as well as immunogenicity to the incorporated antigens.
FAQs
The key variables are pH, ionic strength, temperature, host-receptor binding, and proteolytic enzymes. Each can alter the interactions holding capsid proteins together. Some changes destabilize the particle and damage its protective shell, whereas others initiate the controlled uncoating required for genome delivery. The biological outcome therefore depends on whether the structural change is destructive or properly timed.
Capsid protein interactions do more than maintain shape: they regulate how securely the genome remains enclosed and how readily the particle can transition toward uncoating. A capsid that is too stable may resist genome release, while one destabilized prematurely may lose protection. Studying these interactions helps explain why capsid behavior influences infectivity and supports antiviral strategies targeting assembly or uncoating.
Host receptors and proteolytic enzymes can act as signals or triggers for structural change rather than simply causing nonspecific damage. Their effects help connect particle-entry conditions with genome delivery. Examining these triggers can clarify how a virus moves from a protected extracellular form to a state capable of releasing its genome, while distinguishing regulated uncoating from capsid injury.
Researchers can examine how viral particles respond to defined changes in pH, ionic strength, temperature, receptor exposure, or proteolytic treatment. The resulting structural status is then interpreted alongside whether particles remain potentially infectious. This approach links an environmental or biological challenge to capsid stability and helps identify conditions that preserve particles versus those that damage or activate them.
In immunology and infection research, integrity measurements help separate intact, potentially infectious particles from damaged particles. That distinction supports more precise interpretation of infection experiments because particle condition contributes to whether viral behavior can be evaluated meaningfully. Comparing integrity under different conditions can also clarify how stability influences pathogenesis-related observations and experimental outcomes.
Antibodies are relevant because they can affect viral stability, making capsid integrity a useful framework for studying immune effects on particles. Researchers can examine whether antibody exposure preserves the shell, destabilizes it, or changes the conditions for uncoating. This connects structural stability with immune responses during infection and helps evaluate antiviral strategies that interfere with particle function.
Applications extend across vaccine quality, viral detection, pathogenesis, and antiviral development. For vaccine quality studies, integrity assessment addresses whether particles remain structurally intact; in detection research, it helps characterize the condition of detected particles. In antiviral work, the same principle supports approaches that disrupt capsid assembly or uncoating, while infection studies relate stability to viral behavior.