
Ordering Information
| Product Name | Catalog # | UNIT | Price | Qty | FAVORITES | |
FcRn CRISPR Activation Plasmid (h) | sc-400689-ACT | 20 µg | $397.00 | |||
FcRn CRISPR Activation Plasmid (h2) | sc-400689-ACT-2 | 20 µg | $397.00 |
Human FCGRT encodes the neonatal Fc receptor (FcRn), an MHC class I–related heterodimer that associates with β2-microglobulin and regulates IgG and albumin homeostasis. FcRn mediates pH-dependent binding in endosomes and recycling or transcytosis back to the cell surface, thereby controlling lysosomal degradation and extending serum half-life of its ligands. This pathway integrates with endocytic trafficking, lysosome sorting, and mucosal barrier transport processes in epithelial and endothelial compartments. Altered FcRn expression or function is relevant to immune dysregulation and inflammatory disease biology through effects on IgG persistence, antigen handling, and tissue distribution.
FcRn CRISPR Activation Plasmid (h) provides a targeted, non-destructive approach to upregulating endogenous FCGRT expression without altering the underlying DNA sequence.
FcRn CRISPR Activation Plasmid (h) is a three-plasmid synergistic activation mediator (SAM) system engineered for highly efficient, site-specific transcriptional upregulation of the FCGRT 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 FCGRT transcriptional start site, where VP64, p65, and HSF1 act in concert to recruit transcriptional machinery and drive upregulation of endogenous FcRn expression. Unlike nuclease-active Cas9, dCas9 does not introduce double-strand breaks or modify the genomic sequence, preserving the native FCGRT locus and enabling the study of FcRn-dependent transcriptional responses at the endogenous locus, making it a valuable tool for functional studies, target gene identification, and the modeling of FcRn pathway restoration in tumor cells with silenced or reduced FCGRT expression.
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.