Degradation Kinetics Assay
Degradation Kinetics Assay - Related Videos
08:07
Enzyme Assays and Kinetics
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2023
Enzyme kinetics describes the catalytic effects of enzymes, which are biomolecules that facilitate chemical reactions necessary for living organisms. Enzymes act on molecules, referred to as substrates, to form products. Enzyme kinetic parameters are determined via assays that directly or indirectly measure changes in substrate or product concentration over time. This video will cover the basic principles of enzyme kinetics (including rate equations) and kinetic models. The concepts governing...
10:56
Assays for the Degradation of Misfolded Proteins in Cells
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Cited by 5 •
2016
This report describes protocols for measuring degradation rates of misfolded proteins by either western blot or fluorescence-based assays. The methods can be applied to analysis of other misfolded proteins and for high throughput screening.
02:59
Fluorescence Microplate-Based Cycloheximide Chase Assay: A Technique to Monitor the Degradation Kinetics of Fluorescent Nuclear Misfolded Proteins
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2025
This video describes an in vitro fluorescence-based microplate assay to study the degradation kinetics of a fluorescently-labeled misfolded luciferase mutant protein expressed in the nuclei of transfected mammalian cells. The assay involves the treatment of cells expressing the fluorescent mutant protein with a translation inhibitor and a proteasome inhibitor to assess the proteasome-mediated degradation of the misfolded protein.
07:43
Assaying Proteasomal Degradation in a Cell-free System in Plants
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Cited by 26 •
2014
Targeted protein degradation represents a major regulatory mechanism for cell function. It occurs via a conserved ubiquitin-proteasome pathway, which attaches polyubiquitin chains to the target protein that then serve as molecular “tags” for the 26S proteasome. Here, we describe a simple and reliable cell-free assay for proteasomal degradation of proteins.
03:27
Insoluble Chromogenic Biomass-Based Enzyme Screening: An Assay to Evaluate the Degradation Activity of Plant Biomass-Degrading Enzymes
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2025
This video demonstrates an assay to screen enzymes effective in degrading complex polysaccharides in plant biomass using insoluble chromogenic biomass or ICB. The enzymes hydrolyze ICB to release soluble dye-linked oligosaccharides, and the enzyme activity is assessed by colorimetric analysis of the reaction product.
FAQs
Measurements collected at defined time points create a time-course profile showing how the remaining substance changes. Researchers fit these data with an appropriate kinetic model to estimate a degradation rate, then use that rate to calculate half-life, the time associated with the measured decline. This analysis converts repeated observations into quantitative stability and persistence values.
The assay interprets changes in concentration or measurable signal as evidence of remaining material. If the measurement approach or conditions vary between time points, observed differences may reflect the assay rather than degradation. Consistent measurements therefore allow the time-course pattern to be analyzed reliably and support meaningful comparisons of rates, half-lives, or persistence.
A Degradation Kinetics Assay can compare how different formulations or controlled experimental conditions affect the persistence of a biological molecule, compound, or material. The resulting rates show whether a substance breaks down more quickly or slowly under each condition. Such comparisons help identify influential variables and clarify which formulation offers greater stability for storage or use.
Researchers first place the substance under defined, controlled conditions, then measure its concentration or another measurable signal at selected time points. They organize the resulting measurements as a time course and analyze the pattern with kinetic models. The final calculations provide degradation rates or half-life estimates that can be compared across formulations, conditions, or materials.
The method is useful when researchers need quantitative evidence about stability, persistence, or turnover over time. Applications described for biological research include studying enzyme activity, drug stability, and biomolecule turnover. By following the measurable amount that remains, investigators can compare behavior under controlled conditions and assess how quickly the tested substance loses stability.
Results from the time-course analysis allow researchers to compare formulations, identify conditions associated with faster or slower breakdown, and estimate how long a substance may persist. For biomaterials, the measurements help evaluate performance over time; for formulations, they support stability assessment. These outcomes can also help predict behavior during storage or intended use.