Merck, ESPCAS9RFP-1EA, CMV-ESPCAS9-2A-RFP Plasmid

General description
This product is an expression plasmid that utilizes the CMV promoter for strong transient expression of eSpCas9 and RFP linked by a 2A peptide (CMV-eSpCas9-2A-RFP) allowing for easy visualization of successful transfection. The eSpCas9 expression plasmid is one part of a two part CRISPR system with individual eSpCas9 and gRNA expression vectors.

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Application
Functional Genomics/Target Validation
Creation of gene knockouts in multiple cell lines
Complete knockout of genes not amenable to RNAi
Creation of knock-in cell lines with promoters, fusion tags, or reporters integrated into endogenous genes

Biochem/physiol Actions
CRISPR/Cas systems are employed by bacteria and archaea as a defense against invading viruses and plasmids. Recently, the type II CRISPR/Cas system from the bacterium Streptococcus pyogenes has been engineered to function in eukaryotic systems using two molecular components: a single Cas9 protein and a non-coding guide RNA (gRNA). The Cas9 endonuclease can be programmed with a single gRNA, directing a DNA double-strand break (DSB) at a desired genomic location. Similar to DSBs induced by zinc finger nucleases (ZFNs), the cell then activates endogenous DNA repair processes, either non-homologous end joining (NHEJ) or homology-directed repair (HDR), to heal the targeted DSB. Newly engineered eSpCas9 enables the efficient targeted gene editing of established CRISPR systems with the benefit of reduced off-target effects. Point mutations in the chromosome-binding motif of SpCas9, as described by Slaymaker, et al., provide higher on-target fidelity without loss of cleavage efficiency.
Features and Benefits
Enhanced specificity compared to wild type Cas9
Highly active
Ready to use purified plasmid DNA

Legal Information
CRISPR Use License Agreement

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