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p53-related Assays (DNA damage / Apoptosis)

luciferase reporter constructs validated for DNA damage / apoptosis

The LightSwitch™ Validated p53 Pathway Collection is a comprehensive set of sequence-verified, transfection-ready, promoter reporter constructs that can be used to accurately quantify transcriptional activation and repression in response to induction of the p53 pathway. These constructs are a subset of the 18,000-member LightSwitch Promoter Reporter GoClone™ Collection that were selected based on sequence motif analysis, published information and in-house analysis of each promoter's activity* using our LightSwitch Luciferase Assay.

The p53 Biomarker Set contains 8 of the highest responding promoters under our chosen test conditions, as well as the promoters of 2 housekeeping genes (Figure 1). The p53 Profiling Plate contains 88 promoter reporter constructs that showed significant activation or repression in response to induction (See the p53 Profiling Plate tab below for data and a list of constructs). The E2F7 promoter construct, which is a member of both the Biomarker Set and the Profiling Plate, is also available as a Pathway Reporter Stable Cell Line to facilitate high-throughput screening.

Graph showing the induction ratios of the promoter reporter constructs of the p53 Biomarker Set after transfection into HT1080 human fibrosarcoma cells and treatment with Nutlin.
Figure 1: Induction ratios for each member of the p53 Biomarker Set.

HT1080 human fibrosarcoma cells were transfected with the promoter reporter constructs shown, then treated with 10 µM Nutlin or vehicle only. After 24 hours, each sample was assayed using the LightSwitch Luciferase Assay Kit. The graph shows the ratio of treated/untreated signal on a log scale; error bars represent one standard deviation. “NONE” = No gene annotation. Please see the heatmap under the Profiling Plate tab below for relative promoter activities under untreated conditions.

*Experimental results and the absolute values of luciferase units may vary depending on cell line, treatment and protocols. All data shown is solely for use as a guide for selecting candidate promoters and panels for your particular experimental design.

Name Format Cat No. Price  
LightSwitch™ p53 Biomarker Set 1 set 32085 $3,500 Buy Now

p53 Pathway

p53, a transcription factor that regulates the cell cycle, is well-characterized for its role in tumor suppression. A broad range of stressors such as hypoxia, DNA damage, and viral infection stabilize and activate p53, inducing a large cascade of genes that play significant roles in cell cycle arrest, DNA repair and apoptosis.


The collection of validated LightSwitch p53-related promoter reporters enables you to:

  • Understand the mechanisms by which p53 regulated genes are induced or repressed
  • Quantify the functional consequences of transcription factor binding – while many other technologies give a qualitative view of transcription factor level, our promoter reporter assays quantify the effects of transcription factor binding
  • Confirm data from ChIP, ChIP-chip or ChIP-Seq experiments
  • Measure the effect of sequence variants and mutagenesis on promoter function
  • Screen for promoter activation or develop activity profiles across the p53 signaling pathway for many compounds or conditions in parallel

LightSwitch Luciferase Assay System

The LightSwitch Luciferase Assay System is a complete solution for studying transcriptional & post-transcriptional gene regulation in living mammalian cells. It enables you to directly measure the functional activity of promoters and 3´UTRs through use of an engineered luciferase gene (RenSP) and optimized assay & transfection reagents that ensure superior, reproducible results. In addition to Validated Pathway Collections, the LightSwitch System includes collections of over 30,000 cloned human promoter reporter constructs and human 3´UTR reporter constructs, miRNA mimics and inhibitors, stable cell lines, as well as collections of synthetic long-range response element constructs and synthetic 3´UTRs target validation constructs that can provide more sensitivity than endogenous sequences. Comprehensive Custom Services are also available

Diagram of the LightSwitch Luciferase Promoter Reporter Assay.
LightSwitch Promoter Reporter Assays.

To study a promoter's regulation, it is cloned into a LightSwitch Reporter vector upstream of the RenSP luciferase gene and then transfected into mammalian cells. The cells are stimulated, if required, to induce transcription of RenSP luciferase from the cloned promoter. Promoter activity is then quantified using a LightSwitch Luciferase Assay Kit and a luminometer to measure the amount of luminescence produced.

Advantages of the LightSwitch Luciferase Assay System

  • Quantitative – Novel RenSP luciferase technology allows you to measure promoter activity with industry-leading sensitivity and dynamic range.
  • Simple, fast, complete solution – With pre-cloned LightSwitch Reporter vectors and optimized transfection & assay reagents, you can study regulation of your gene today. No cloning, DNA preparation or optimization is needed, and most studies do not require any internal transfection controls.
  • Comprehensive and verified – The genome-wide LightSwitch Reporter Collections are sequence-verified, transfection-ready promoter and 3´UTR reporter vectors.
  • Functionally insightful – Learn about the actual effects of transcription factor binding to verify computational predictions and supplement microarray or sequencing data.
  • Cost-effective – Efficiently screen for activation and/or repression using a multitude of conditions.

LightSwitch™ p53 Pathway Profiling Plate

The p53 Profiling Plate is a subset of promoter reporter constructs chosen from the LightSwitch Promoter Reporter GoClone™ Collection. Promoters that were expected to be up- or down-regulated in the p53 pathway were chosen based on motif analysis and published information. In-house luciferase testing was then performed to select those promoter reporter constructs that were activated or repressed in response to our induction method, which was to treat HT1080 cells with 200 ng/ml Nutlin for 24 hours following transfection.

p53 Profiling Plate heatmap

The heatmap at right shows the untreated and induced activity for all constructs that are members of the pathway profiling plate. On the right side of the figure, the colors represent log2 transformed ratios of treated/untreated activity according to the color scale shown at the base of the heatmap. Black indicates no change; the intensity of red or blue color indicates levels of induction or repression, respectively. On the left side of the figure, the intensity of yellow color depicts the activity of each promoter in the unstimulated (untreated) condition. All untreated signals are relative to the highest and lowest values within the individual experiment. (“Nutlin” = HT1080 human fibrosarcoma cells treated with 200 ng/ml Nutlin for 24 hours.)

p53 Profiling Plate contents

The p53 Profiling Plate includes 88 promoter reporter constructs (including the 8 top-responding constructs that comprise the p53 Biomarker Set, as well as 7 housekeeping / random promoters that are unlikely to respond to conditions that induce p53). The controls can be used to correct for non-specific changes in overall signal in response to the stimulus. For example, some compounds used for induction are very toxic and result in a significant decrease in overall luciferase signal across the entire panel of constructs in a non-promoter-specific manner. Also included in the plate are 8 transfection controls that are used to determine the conditions that yield maximum transfection efficiency and reproducibility.

View plate map (.xlsx).


If you would like to order 5 or fewer members of the p53 Profiling Plate, you can use the Product IDs found in the file for the plate map above to order directly on Active Motif's SwitchGear Genomics website. If you wish to order the entire plate (or a minimum of 5 or more members), click here to send us an e-mail detailing which constructs you would like, and what amount (5 µg, 10 µg, 1 mg, etc.). We will send you a quote based on your request.

Heatmap data showing the untreated activity and induction response for each construct in the p53 Pathway Profiling Plate using HT1080 human fibrosarcoma cells treated with 200 ng/ml Nutlin for 24 hours
Click image to enlarge.

The p53 Biomarker Set contains 5 µg aliquots each of 8 promoter reporter constructs and 2 housekeeping promoter constructs (NO_ANNOTATION & NUB1) for use as controls. Click on the links below for clone information.

The p53 Profiling Plate includes 88 promoter reporter constructs and 8 transfection control constructs (4 constructs from housekeeping genes with promoter activities of varying strengths (P1-P4), and 4 constructs with random 1 kb fragments (R1-R4)). To download a plate map with links to clone information, please click here.

** The E2F7 promoter construct, which is a member of both the Biomarker Set and the Profiling Plate, is also available as a Pathway Reporter Stable Cell Line to facilitate high-throughput screening.