
Ordering Information
| Product Name | Catalog # | UNIT | Price | Qty | FAVORITES | |
AHRR CRISPR Activation Plasmid (h) | sc-412812-ACT | 20 µg | $397.00 |
Human AHRR (aryl hydrocarbon receptor repressor) encodes a bHLH-PAS transcriptional regulator that provides negative feedback control of aryl hydrocarbon receptor (AHR) signaling. By competing for ARNT and binding xenobiotic response elements, AHRR attenuates AHR-driven transcriptional programs that influence xenobiotic metabolism, inflammatory signaling, oxidative stress responses, and cellular differentiation. Altered AHRR activity and epigenetic regulation have been linked to dysregulated detoxification pathways and immune-modulatory states, making it a useful node for studying environmentally responsive gene regulation. In biomedical research, AHRR is frequently interrogated in contexts such as epithelial homeostasis, vascular biology, and tumor-associated transcriptional reprogramming where AHR pathway tone can shape phenotype.
AHRR CRISPR Activation Plasmid (h) provides a targeted, non-destructive approach to upregulating endogenous AHRR expression without altering the underlying DNA sequence.
AHRR CRISPR Activation Plasmid (h) is a three-plasmid synergistic activation mediator (SAM) system engineered for highly efficient, site-specific transcriptional upregulation of the AHRR locus in human cell lines. The system is built around a catalytically inactive Cas9 (dCas9) carrying two inactivating mutations (D10A and N863A) that eliminate nuclease activity while preserving DNA binding. This dCas9 is fused to VP64, a potent transcriptional activator, and is co-expressed with a blasticidin resistance gene for selection. The second plasmid encodes the MS2-p65-HSF1 fusion protein, a secondary activator complex that works in concert with dCas9-VP64, alongside a hygromycin resistance gene. The third plasmid encodes a target-specific 20 nt sgRNA fused to two MS2 RNA aptamers that recruit the MS2-p65-HSF1 complex to the activation site, accompanied by a puromycin resistance gene. The three plasmids are delivered at a 1:1:1 mass ratio for balanced expression of all system components.
Once assembled at the target locus, the SAM complex binds within approximately 200 bp upstream of the AHRR transcriptional start site, where VP64, p65, and HSF1 act in concert to recruit transcriptional machinery and drive upregulation of endogenous AHRR expression. Unlike nuclease-active Cas9, dCas9 does not introduce double-strand breaks or modify the genomic sequence, preserving the native AHRR locus and enabling the study of AHRR-dependent transcriptional responses at the endogenous locus, making it a valuable tool for functional studies, target gene identification, and the modeling of AHRR pathway restoration in tumor cells with silenced or reduced AHRR expression.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.