SAMVP64BSTV
dCas9-VP64-Blasticidin SAM CRISPRa Helper Construct 1 Lentiviral Transduction Particles
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About This Item
UNSPSC Code:
12352200
NACRES:
NA.51
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packaging
pkg of 8x25 μL (vials)
concentration
≥1x106 VP/ml (via p24 assay)
application(s)
CRISPR
shipped in
dry ice
storage temp.
−70°C
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General description
Ready to use dCas9-VP64 lentiviral particles enable immediate transduction of a wide range of cell lines. dCas9-VP64 lentiviral particles efficiently and stably integrate dCas9-VP64 and blasticidin resistance cassette linked by a 2A peptide and driven by the EF1 alpha promoter (EF1a-dCas9-VP64-2A-Blasticidin) for strong expression in both dividing and non-dividing cell lines. They are ideal for avoiding the tedious lentivirus production process and are one part of a three part CRISPR system with individual dCas9-VP64. MS2-p65-HSF1 and gRNA expression vectors.
To order gRNA in any format click here
To order gRNA in any format click here
Application
Functional Genomics/Target Validation
- Unbiased forward genetic screening
- Strong transcriptional activation in multiple cell lines
- Creation of cell lines stably expressing dCas9-VP64.
Features and Benefits
- Highly specific and highly active
- Sequence verified high purity, high titer lentiviral particles
- Activates genes through transcriptional activation rather than cDNA based overexpression
Learn more about SAM CRISPR Activators at SigmaAldrich.com/CRISPRa
Principle
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 rendered inactive (dCas9) with mutations to the two protein domains, RuvC and HnH (D10A and H840A respectively), which are responsible for nuclease activity. The nuclease deficient protein can then be fused with the transcriptional activator VP64 and used in conjunction with a guide RNA modified with MS2 RNA aptamers that function to recruit the additional transcriptional coactivators p65 and HSF1. The assembled SAM complex is then used as a cargo delivery system to target gene promoters, enabling site-specific transcriptional activation of the gene of interest.
Unit Definition
VP/mL is the concentration unit of measure for viral titer estimated by p24 assay.
Storage Class
12 - Non Combustible Liquids
wgk_germany
WGK 3
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Julia Joung et al.
Nature protocols, 12(4), 828-863 (2017-03-24)
Forward genetic screens are powerful tools for the unbiased discovery and functional characterization of specific genetic elements associated with a phenotype of interest. Recently, the RNA-guided endonuclease Cas9 from the microbial CRISPR (clustered regularly interspaced short palindromic repeats) immune system
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