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pNiFty : NF-κB(5x) - ELAM - AmpR - Luc
TLR-signaling reporter plasmid- AmpicillinR - Luciferase
pNiFty-Luc plasmid is composed of three key elements: an ELAM proximal promoter, five NF-κB repeated transcription factor binding sites (TFBS) and a Luc (Luciferase) reporter gene.Back to the top
Transcription factor binding sites: NF-κB (5x)
Minimal Promoter: ELAM
Reporter Gene: LuciferaseBack to the top
- 20 µg of lyophilized DNA
Product is shipped at room temperature.
Lyophilized DNA should be resuspended upon receipt and stored at -20°C.Back to the top
The proximal promoters are shorter than 500 bp and contain transcription factor binding sites. Upon stimulation in 293 cells, their expression level remains undetectable. With the addition of repeated TFBS, the proximal promoters become inducible by the appropriate stimulus and drive the expression of the reporter gene.
ELAM promoter: the proximal promoter of the endothelial cell-leukocyte adhesion molecule (ELAM-1; E-selectin) gene contains three NF-κB sites and is truly NF-kB specific, as it lacks an AP1/CREB site found in the full-length promoter [1, 2].
Transcription factor binding sites (TFBS)
NF-kB binding site: Nuclear factor (NF)-κB is a “rapid-acting” primary transcription factor activated by a wide variety of PRRs. NF-κB is a protein complex that belongs to the Rel-homology domain-containing protein family. The prototypical NF-κB is composed of the p65(RelA) and p50 subunits . NF-κB binds specific decameric DNA sequences (GGGRNNYYCC, R-purine Y=pyrimidine) and activates genes involved in the regulation of the innate and adaptative immune response.
Luc reporter gene: The firefly luciferase gene is a highly sensitive reporter gene and thus is ideal for detecting low-level gene expression. Luc activity can be quantified in cell extracts by using kits commercially available from other companies.
1. Schindler U., Baichwal VR., 1994. Three NF-kappa B binding sites in the human E-selectin gene required for maximal tumor necrosis factor alpha-induced expression. Mol Cell Biol. 14(9):5820-31.
2. Jensen LE. & Whitehead AS., 2003. ELAM-1/E-selectin promoter contains an inducible AP-1/CREB site and is not NFkB-specific. Biotechniques 35:54-58.
3. Kawai T. & Akira S., 2007. Signaling to NF-kappaB by Toll-like receptors. Trends Mol Med. 13(11):460-9.
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