Viral Surface Glycoproteins
Viral Surface Glycoproteins - Related Videos
08:29
Averaging of Viral Envelope Glycoprotein Spikes from Electron Cryotomography Reconstructions using Jsubtomo
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Cited by 23 •
2014
An approach is presented for determining structures of viral membrane glycoprotein complexes using a combination of electron cryo-tomography and sub-tomogram averaging with the computational package Jsubtomo.
12:31
Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
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Cited by 14 •
2012
Adenovirus particles are engineered to contain either the unnatural amino acid analogue azidohomoalanine or the azido sugar O-GlcNAz. The azide group of each is chemoselectively ligated via "click" chemistry reactions as a means of viral surface modification.
09:45
Detection of Trypanosoma brucei Variant Surface Glycoprotein Switching by Magnetic Activated Cell Sorting and Flow Cytometry
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Cited by 3 •
2016
African trypanosomes grown in vitro undergo antigenic variation at a low rate, such that populations are made up of parasites expressing a dominant variant surface glycoprotein (VSG) type and a small population of "switched" variants. This protocol describes a fast method for detecting and quantifying these populations.
02:59
Extraction of Viral RNA from Surface-Bound Virions Using a Silica Spin Column
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2026
Source: Klaus, J. P. et al. Highly Sensitive Assay for Measurement of Arenavirus-cell Attachment. J. Vis. Exp. (2016)This video demonstrates the extraction of viral RNA from surface-bound virions on epithelial cells using silica spin columns. The method includes chemical lysis, RNA stabilization, and membrane-based purification for downstream quantification of virus-cell attachment.
02:47
A Viral Attachment Assay for Screening of Antiviral Compounds
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2025
This video demonstrates a viral attachment assay for screening antiviral compounds. Using genetically modified hepatitis C virus and luciferase, it assesses inhibitory effects on viral attachment, as indicated by lower light intensity in co-treated wells compared to wells treated with the virus alone.
FAQs
Receptor-binding specificity determines which host cells a virus can recognize and attach to. Differences in the glycoprotein regions that contact cellular receptors can therefore restrict infection to particular species, tissues, or cell types. Studying these interactions helps investigators connect molecular binding properties with patterns of susceptibility, tissue involvement, and possible changes in viral transmission.
After receptor engagement, an envelope glycoprotein can undergo structural rearrangements that promote fusion between the viral membrane and the host-cell membrane. These changes help expose or reposition functional regions needed for entry, linking receptor recognition to genome delivery. Experimental analysis of these states can clarify how entry occurs and identify stages that antiviral interventions might target.
Exposed glycoprotein regions provide accessible targets for antibodies, but their recognition depends on the protein’s structure and sequence. Antibodies may bind particular surface features and interfere with receptor interaction or entry, while changes in those features can reduce recognition. This relationship makes glycoprotein variation important for interpreting immune protection and antigenic differences among viral strains.
Sequence or structural changes in surface glycoproteins can alter receptor interactions and antibody binding at the same time. Researchers therefore examine variation to determine whether emerging strains may differ in host-cell susceptibility, immune recognition, or transmission-related properties. Comparing glycoproteins across strains supports interpretation of surveillance data and helps identify changes with potential relevance to infection control.
Vaccine research uses information about glycoprotein exposure, receptor-binding regions, and antibody-targeted structures to select viral components that can represent relevant immune targets. The goal is to evaluate whether an immune response recognizes features associated with viral entry and whether variation could affect that recognition. These analyses help guide antigen selection and assessment of candidate vaccine strategies.
Their exposed and immunologically recognizable regions can provide targets for diagnostic assays. Investigators may examine whether antibodies or other assay components detect glycoprotein features consistently across viral strains. Because antigenic variation can change recognition, comparing surface proteins is important when assessing assay performance and deciding whether a test remains informative as circulating viruses change.
Researchers can use structural and functional knowledge of viral surface glycoproteins to search for antibodies that block receptor engagement, prevent entry-related rearrangements, or recognize conserved exposed regions. Characterizing these interactions connects antibody binding with a potential antiviral effect. The findings can support discovery of antibody candidates and clarify which glycoprotein features are promising intervention targets.
Surveillance compares glycoprotein sequences or properties among viral strains to identify changes that may influence receptor use, tissue tropism, transmission, or antibody recognition. Interpreting these changes alongside infection and immune data helps researchers assess their significance rather than treating every mutation as equivalent. This makes glycoprotein monitoring useful for tracking emerging viral characteristics.