Luciferase Activity
Luciferase Activity - Related Videos
12:02
High-throughput Analysis of Mammalian Olfactory Receptors: Measurement of Receptor Activation via Luciferase Activity
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Cited by 16 •
2014
Olfactory receptor activation patterns encode odor identity, but the lack of published data identifying odorant ligands for mammalian olfactory receptors hinders the development of a comprehensive model of odor coding. This protocol describes a method to facilitate high-throughput identification of olfactory receptor ligands and quantification of receptor activation.
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.
10:06
Slice Preparation, Organotypic Tissue Culturing and Luciferase Recording of Clock Gene Activity in the Suprachiasmatic Nucleus
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Cited by 32 •
2011
The procedure of preparing slices containing the adult mouse hypothalamic suprachiasmatic nucleus (SCN), and a rapid way to culture the SCN tissue in organotypic culture condition, are reported. Further, the measurement of oscillatory clock gene protein expression using dynamic luciferase reporter technology is described.
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.
03:38
Measuring Mycobacterium smegmatis Mistranslation Rates Using a GFP/Luciferase Reporter System
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2025
Source: Chen, Y., et al., Measurement of Specific Mycobacterial Mistranslation Rates with Gain-of-function Reporter Systems. J. Vis. Exp. (2019)This video demonstrates a method to quantify mistranslation in Mycobacterium smegmatis using an inducible GFP and secreted mutant luciferase reporter system. It shows how luminescence resulting from mistranslation is measured and compared to GFP fluorescence to evaluate the impact of a test molecule on translational accuracy.
FAQs
The reaction depends on more than enzyme presence: luciferase requires its specific substrate, required cofactors, and suitable reaction conditions. Under those circumstances, substrate oxidation produces photons that can be measured. Because signal intensity generally reflects enzyme abundance or reporter expression, changes in light output can serve as a quantitative indicator of altered biological activity.
Signal intensity should be interpreted according to what controls reporter production. In a promoter assay, changing light output can indicate altered promoter activity or gene regulation; in a pathway assay, it can indicate a response to signaling changes. The measurement therefore links emitted light to the biological event controlling luciferase expression, rather than treating photons as an independent cancer endpoint.
The two formats answer different questions. Reporter assays connect light output with promoter activity, gene regulation, or signaling pathway responses. Luciferase-labeled cells instead provide a way to follow tumor growth, metastasis, and treatment effects in living models. This distinction helps researchers select a molecular readout for regulatory processes or a whole-model readout for cancer behavior over time.
A basic measurement requires providing the luciferase system with its specific substrate and required cofactors under suitable conditions, then recording the emitted photons as a quantitative signal. Researchers interpret the resulting light output in relation to enzyme abundance or reporter expression. Maintaining the appropriate reaction conditions is essential because the signal depends on successful substrate oxidation.
These assays are suited to questions about how promoters, genes, or signaling pathways respond during cancer-related experiments. By monitoring reporter-associated light, researchers can assess changes in regulatory activity rather than relying only on a final biological outcome. The approach is particularly useful when the goal is to track dynamic gene regulation or pathway responses quantitatively.
Luciferase-labeled cells enable researchers to monitor tumor growth, metastasis, and treatment effects in living models through bioluminescent measurements. Repeated measurements can reveal how these processes change over time, supporting evaluation of experimental therapies. This longitudinal perspective is valuable because it connects treatment exposure with evolving cancer behavior instead of providing only a single endpoint.