Luciferase Inhibitors
Luciferase Inhibitors - Related Videos
05:55
Identifying Inhibitors of the HBx-DDB1 Interaction Using a Split Luciferase Assay System
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Cited by 4 •
2019
Here, we present a method for screening anti-hepatitis B viral agents that inhibit the HBx-DDB1 interaction using a split luciferase assay system. This system allows easy detection of protein-protein interactions and is suitable for identifying inhibitors of such interactions.
03:44
Luciferase Assay to Study Efficacy of Antiparasitic Chemicals Against Parasites
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2025
The video demonstrates the luciferase assay used to determine the efficacy of an antiparasitic chemical inhibitor against the intracellular pathogen Toxoplasma gondii. The study involves luciferase-expressing parasites invading the host cells to replicate and survive. The chemical inhibitor binds with the cysteine proteases of the parasite and inhibits replication. The luciferase activity detected is proportional to the fold changes in parasite growth, determining the drug's efficacy against...
02:01
Assessing Pseudovirus Infection Using Luciferase Reporter Assay
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2026
Source: Chang, X., et al. Preparation of Pseudo-Typed H5 Avian Influenza Viruses with Calcium Phosphate Transfection Method and Measurement of Antibody Neutralizing Activity. J. Vis. Exp. (2021).This video demonstrates a luciferase-based assay to quantify pseudovirus infection in epithelial cells. The pseudovirus encodes the luciferase gene, which is expressed in infected cells. After washing, and cells are incubated with lysis buffer at an ultra-low temperature, and then thawed to induce lysis.
02:59
Luciferase Assay for Measuring γ-Secretase Activity in Human Cells
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2025
This video demonstrates the procedure of measuring γ-secretase activity in genetically modified human cells using a tetracycline-inducible system. The process involves inducing APP gene expression with tetracycline, generating amyloid-β peptides, and activating luciferase production. The bioluminescence resulting from the luciferase-substrate reaction is then measured, reflecting γ-secretase activity.
01:52
Eukaryotic Transcription Inhibitors
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2020
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells. Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
FAQs
Their effects can arise at several points in the light-producing reaction. A compound may occupy the luciferase active site, compete with luciferin or ATP, or interfere with the catalytic oxidation that generates light. These distinct mechanisms matter because two compounds producing similar signal reductions may affect different parts of the reaction and therefore carry different implications for enzyme structure and kinetics.
Inhibition reduces the enzyme’s light-producing activity, whereas quenching reduces the detected emission without necessarily disrupting catalysis. This distinction is important when interpreting a weak reporter signal: an apparent loss of activity may reflect interference with the reaction or with the light itself. Separating these possibilities helps identify assay interference and prevents incorrect conclusions about biological regulation.
The effect of a compound depends on the luciferase enzyme and the interaction involved. Selectivity analysis can show whether a molecule targets a particular enzyme system or broadly affects bioluminescent measurements. That information strengthens comparisons of enzyme structure and kinetics and helps determine whether a reduced signal reflects the intended experimental mechanism rather than a general assay artifact.
Because some compounds compete with luciferin or ATP, the availability of these reaction components influences the observed reduction in light. A signal change therefore cannot be interpreted solely by its magnitude; researchers must consider which substrate or cofactor may be affected. This comparison supports more precise analysis of catalytic behavior and helps distinguish active-site competition from other inhibitory mechanisms.
Evaluation centers on measuring how a compound changes the reporter signal and then determining whether the effect is consistent with enzyme inhibition, substrate or ATP competition, catalytic disruption, or light quenching. Researchers can use this analysis to identify assay interference before interpreting gene-expression results. The outcome is a more reliable connection between luminescence and the biological process being measured.
They are useful whenever bioluminescent output serves as an experimental readout. In drug-screening studies, inhibitors help reveal whether a candidate compound directly interferes with the reporter assay. In imaging and biosensor research, controlled effects on signal strength support system evaluation and interpretation. Their use is especially relevant when signal changes must be separated from changes in the underlying biology.