Gfp Reporter Gene
Gfp Reporter Gene - Related Videos
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.
09:22
Rapid Synthesis and Screening of Chemically Activated Transcription Factors with GFP-based Reporters
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Cited by 11 •
2013
This protocol describes an experimental procedure for the rapid construction of artificial transcription factors (ATFs) with cognate GFP reporters and quantification of the ATFs ability to stimulate GFP expression via flow cytometry.
02:41
Clonal Isolation and PCR Screening of GFP-Excised Recombinant Herpesvirus Retaining the Target Gene
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2026
Source: Tang, N., et al. Generating Recombinant Avian Herpesvirus Vectors with CRISPR/Cas9 Gene Editing. J. Vis. Exp. (2019)This video demonstrates the clonal isolation and PCR-based screening of recombinant herpesvirus following site-specific excision of a GFP marker. Fluorescence-activated cell sorting is used to isolate non-fluorescent infected cells, and junction PCR confirms retention of the target gene in GFP-negative clones.
02:11
Reporter Genes
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2021
Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell. Commonly used reporter...
12:58
Transfecting RAW264.7 Cells with a Luciferase Reporter Gene
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Cited by 13 •
2015
Transfection into the macrophage cell line, RAW264.7, is difficult due to the cell’s natural response against foreign materials. We described here a gentle yet robust procedure for transfecting luciferase reporter genes into RAW264.7 cells.
FAQs
The promoter placed upstream of GFP determines which regulatory activity controls fluorescence. If that promoter responds to a particular cellular signal, the reporter provides a visible readout of that signal rather than a general measure of all gene activity. In infection studies, promoter choice can therefore focus analysis on pathogen-associated or host-cell responses relevant to the experimental question.
Fluorescence depends on more than GFP production alone: the protein must form its chromophore and then emit light after excitation at appropriate wavelengths. Consequently, the detected signal reflects the production and maturation of detectable GFP. This helps explain why fluorescence can provide information about the timing of promoter activity while still requiring careful interpretation as a measurable reporter output.
Because GFP fluorescence can be detected in living cells and tissues, researchers can observe changes without relying exclusively on destructive sampling at each time point. Repeated observation can reveal when and where reporter activity appears during an experiment. This temporal and spatial information is especially valuable for examining dynamic host-pathogen interactions or changing immune-cell responses.
A GFP reporter provides an indirect readout by coupling fluorescence to promoter activity, whereas a direct measurement would examine the target molecule itself. Its strength is the ability to visualize transcription-associated activity in living material, including its location and timing. Interpretation must therefore remain tied to the selected promoter and the relationship between that promoter and the biological process under study.
The workflow begins by selecting a promoter whose activity represents the process of interest and linking its activity to GFP production. Researchers then observe fluorescence after the GFP chromophore forms and the protein is excited at suitable wavelengths. Comparing signal location or timing across conditions can provide a readout of transcriptional activity in living cells or tissues.
In infection research, fluorescence can mark pathogen-associated activity and allow investigators to follow where infection-related signals appear in cells or tissues. Monitoring the signal over time supports analysis of pathogen entry and subsequent spread without requiring every observation to come from a destructive sample. The resulting spatial and temporal patterns help characterize host-pathogen interactions.
A reporter controlled by a promoter associated with an immune response can make activation or signaling visible through changes in fluorescence. Researchers can examine where the signal occurs and when it develops in living cells or tissues. This approach supports investigation of immune responses during infection while providing a visual, transcription-linked measurement rather than relying only on endpoint observations.
GFP reporters can provide a visible readout of whether a selected promoter is active in the context of therapeutic gene delivery or regulation. Fluorescence helps researchers assess the location and timing of reporter activity in living material. In immunology and infection studies, this supports quantitative analysis of how therapeutic gene expression relates to host responses or pathogen-associated processes.