Cystatin B Variants
Cystatin B Variants - Related Videos
02:30
Histone Variants at the Centromere
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2020
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...
14:06
Detection of Rare Genomic Variants from Pooled Sequencing Using SPLINTER
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Cited by 10 •
2012
Pooled DNA sequencing is a fast and cost-effective strategy to detect rare variants associated with complex phenotypes in large cohorts. Here we describe the computational analysis of pooled, next-generation sequencing of 32 cancer-related genes using the SPLINTER software package. This method is scalable, and applicable to any phenotype of interest.
03:20
Generation of Influenza Virus Escape Variants against Neutralizing Antibodies
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2025
This video demonstrates a technique for generating escape variants of neutralizing influenza virus monoclonal antibodies. Antibody-neutralized virus suspension is injected into embryonated chicken eggs to propagate escape variants selectively. This results in a virus population predominantly of escape variants, confirmed via a Hemagglutination assay.
07:55
Generation of Escape Variants of Neutralizing Influenza Virus Monoclonal Antibodies
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Cited by 10 •
2017
We describe a method by which we identify critical residues required for the binding of human or murine monoclonal antibodies that target the viral hemagglutinin of influenza A viruses. The protocol can be adapted to other virus surface glycoproteins and their corresponding neutralizing antibodies.
11:19
Merging Absolute and Relative Quantitative PCR Data to Quantify STAT3 Splice Variant Transcripts
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Cited by 2 •
2016
Tandem splicing events occur at sites less than 12 nucleotides apart. Quantifying ratios of such splice variants is feasible using an absolute quantitative PCR approach. This manuscript describes how splice variants of the gene STAT3, in which two splicing events results in Serine-701 inclusion/exclusion and α/β C-termini, can be quantified.
FAQs
Their effects can arise at distinct levels: a variant may change the protein’s structure, reduce how much cystatin B is produced, decrease its stability, or alter its cellular localization. These mechanisms are not interchangeable. Separating them helps explain why two inherited CSTB changes can produce different effects on protease inhibition and provides a basis for assessing their biological significance.
Cystatin B must be present in the appropriate cellular location to regulate its target cysteine proteases effectively. A variant that lowers protein abundance, destabilizes the protein, or redirects it within the cell may weaken this control even if some inhibitory activity remains. The resulting imbalance can disturb intracellular protein turnover and clarify how a molecular change affects cell function.
Cathepsins are among the cysteine proteases regulated by cystatin B, so weakened inhibition may change proteolytic activity inside cells. Because intracellular protein turnover contributes to cellular maintenance, disruption of this balance offers a mechanistic connection between CSTB dysfunction and neuronal health. This relationship is particularly relevant when interpreting the biology of Unverricht–Lundborg disease.
Analysis links an inherited CSTB change with its possible molecular consequence, such as altered protein stability, abundance, localization, or protease inhibition. That interpretation can support genetic diagnosis by moving beyond the presence of a sequence change alone. It also helps distinguish variants that are more likely to disrupt cystatin B function from changes whose significance remains uncertain.
Pathogenicity assessment centers on whether the variant plausibly disrupts cystatin B biology. Relevant considerations include predicted effects on protein structure or production, stability, cellular localization, and regulation of cysteine proteases. Connecting these molecular consequences with conditions associated with CSTB dysfunction strengthens interpretation and helps place a variant within a biologically coherent disease model.
Comparing specific CSTB changes with observed disease features can reveal whether different molecular effects correspond to different phenotypes. Researchers can then relate variant classes to protease regulation, intracellular protein turnover, and neuronal health. This approach extends beyond diagnosis by using inherited variation to investigate how cystatin B dysfunction contributes to Unverricht–Lundborg disease and other associated conditions.