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  1. Keeping Up With CRISPR/Cas9

    Type
    Blog Post
    ...Looking for CRISPR Plasmids? CRISPR-Cas9 Plasmids available at Addgene CRISPR-Cas9 References, Protocols...CRISPR/Cas9 system to precisely edit specific genes in monkeys. "Our study shows that the CRISPR/Cas9 system...advances in the understanding and application of CRISPR/Cas9 technology are coming along at a fast and furious...Beisel and Rodolphe Barrangou, had applied the CRISPR/Cas9 system to developing an antibiotic that selectively...important details in their understanding of how CRISPR/Cas9s actually work. Last month, the Lawrence Berkeley... Nogales presented the first detailed picture of Cas9's three-dimensional shape via x-ray crystallography...Institute and MIT published another report showing Cas9's structural details. "Understanding this structure...
  2. CRISPR 101: Mammalian Expression Systems and Delivery Methods

    Type
    Blog Post
    ...in vivo viral delivery. Cas9 mRNA and gRNA Plasmids containing gRNA and Cas9 are used in in vitro transcription... CRISPR tools for your application: Wildtype Cas9 or Cas9 nickase are appropriate for generating knockouts...generating transgenic embryos. Cas9-gRNA ribonucleoprotein complexes Purified Cas9 protein and in vitro transcribed...need to deliver. Minimally, one or more sgRNAs and Cas9 are required for any application. If you want to...add a tag, you will also need to deliver a donor plasmid or single-stranded DNA oligonucleotide, so you ...Application Mammalian expression vector Promoter driving Cas9 expression can be constitutive or inducible. U6 ...stable cell lines. Transient or stable expression of Cas9 and/or gRNA in a mammalian cell line that can be...
  3. What's New in CRISPR - December 2019

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    Blog Post
    ...CRISPR plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid tools...CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids ...toolkit for epitope tagging Lentiviral capsid-based Cas9/gRNA ribonucleoprotein delivery Cytosine deaminase... a catalytically impaired Streptococcus pyogenes Cas9. They called this editor Target-ACE (adenine and...Read the paper in bioRxiv Find Target-ACE   CRISPR/Cas9-based toolkit for epitope tagging in neurons Harold... the paper in bioRxiv Find the ORANGE toolkit   Cas9/gRNA ribonucleoprotein delivery by lentiviral capsid-based...capsid-based bionanoparticle Transient expression of CRISPR/Cas9 in cells has advantages like reduced off-target ...
  4. Overcoming the AAV Size Limitation for CRISPR Delivery

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    Blog Post
    ...one AAV, Cas9 must be made smaller. Previous attempts to “shrink” Cas9 include the use of St1Cas9 (~3.3 ...amino acids in length, Cas9 from Campylobacter jejuni (CjCas9) is the smallest Cas9 ortholog characterized...vehicle for Cas9. However, to allow for more room for regulatory sequences while still fitting Cas9 and its...equally potent Cas9 protein, the Zhang lab took a different approach. They analyzed over 600 Cas9 orthologs... aureus Cas9 (SaCas9, 1053 amino acids) displayed cleavage activity in mammalian cells. SaCas9 produced...capabilities of full-length SpCas9. This set of plasmids includes AAV-Cas9C-VPR for targeted gene activation...truncated Cas9. Unfortunately, certain drawbacks limit the utility of these systems: St1Cas9 requires ...
  5. What's New in CRISPR - September 2019

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    Blog Post
    ...CRISPR plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid tools...inducible CRISPR/Cas9 systems for transcriptional activation and genome editing by fusing Cas9 to a mutated...Nucleic Acids Research Find the drug inducible Cas9 plasmids E. coli genome-wide inhibition library In the...CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids ...vectors to create knock-ins CasX Drug inducible CRISPR/Cas9 activation E. coli genome-wide inhibition library...vectors GeneWeld from Jeffrey Essner’s lab uses CRISPR/Cas9 and a donor vector to create knock-ins of fluorescent..., or transcriptional regulators. In this system, Cas9 generates a double-stranded DNA break at the genomic...
  6. Google Forums Round Up: First Impressions of NgAgo

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    Blog Post
    ... preassembled Cas9/gRNA complexes or with guide RNA- and Cas9-expression plasmids. Cas9 guide RNA delivery...genome, which seem resistant to Cas9 cleavage (1). Both the CRISPR-Cas9 and NgAgo genome engineering methods...Targeting Specificity with eSpCas9 and SpCas9-HF1 See How Cpf1 Stacks Up to Cas9 and NgAgo Resources on ...sequencing on select regions of all distributed plasmids as part of quality control, but does not perform...engineer sharing the stage with much-lauded CRISPR-Cas9 is DNA-guided endonuclease NgAgo! We'll discuss ...head-to-head.  Exciting features of NgAgo First, unlike Cas9, NgAgo does not require a PAM sequence for target... guide sequence rather than an RNA guide as with Cas9. Third, it can be used to target “difficult” GC-...
  7. Plasmids for Endogenous Gene Tagging in Human Cells

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    Blog Post
    ...Designing the donor plasmid Figure 2: Donor plasmid design strategy. A donor plasmid contains 1 kb homology... areas of the plasmid to prevent the plasmid from being cut and destroyed by CRISPR/Cas9 during transfection...components of CRISPR/Cas9 (Cas9 protein and the crRNA-tracrRNA complex) and the donor plasmid into the cells...many labs. We’ve created and tested plasmids that use CRISPR/Cas9 to endogenously tag a wide variety of... the tag. Created with BioRender.com. Plasmids, plasmids everywhere To find out more about gene edited...regulatory control. But even with the advent of CRISPR/Cas9 technology, inserting large tags into a precise ... of genes with GFP. These plasmids are available through Addgene, and the stem cell lines we’ve made using...
  8. Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells

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    Blog Post
    ...releasing Cas9. Nanoblades can also deliver Cas9 variants, such as a transcriptional activator dCas9-VPR, ...Nanoblades by association with the the Cas9 portion of the Gag-Cas9 fusion protein. A single Nanoblade particle...compared to DNA transfection of gRNA and Cas9 expression plasmids. These results are in line with previous...along with the gRNA and Cas9. An “all-in-one” Nanoblades which carries a gRNA, Cas9, and a HDR donor template...centrifugation. Gag-Cas9 fusion protein The MLV Gag protein fused to a Flag-tagged SpCas9 is incorporated ...infiltrate cells. Options for CRISPR delivery include plasmid transfection, RNP electroporation, and viral transduction... leukemia virus (MLV)-like particles loaded with Cas9-gRNA ribonucleoproteins (RNPs). According to the...
  9. What's New in CRISPR - May 2019

    Type
    Blog Post
    ...in Communications Biology Find the Cas9-PCV and PCV-Cas9 plasmids Selective curbing of unwanted RNA ...CRISPR plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid tools...CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids ...Read the paper in mSphere Find the dCas9 and dCas9-Mxi1 plasmids If you have a new CRISPR tool you’ve...Covalent tethering of DNA template to Cas9 SECURE base editors Nme2Cas9 CRISPR interference in Candida albicans... AAV delivery of Nme2Cas9 with gRNA cassette Erik Sontheimer’s lab identified a Cas9 protein from Neisseria...library Covalent tethering of DNA repair template to Cas9 Homology-directed repair (HDR) can be used to make...
  10. Optimizing Donor DNA for Enhanced CRISPR Genome Editing

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    Blog Post
    ...Postdoctoral Researcher in Jacob Corn’s lab. CRISPR-Cas9 (Cas9) is an RNA-guided nuclease that targets and cuts...replacement by HDR. Understanding Cas9 biophysics enhances HDR We first measured Cas9 dissociation rates and discovered...interaction with the Cas9-DNA duplex. Image from Richardson et al., 2016.   dCas9 enables sequence replacement...normally accompanies Cas9 cutting. We still don’t know the mechanism underlying dCas9 editing, but it could... cuts genomic DNA. The interplay between Cas9 (which causes the breaks) and host cell DNA repair factors...factors (which repair those breaks) makes Cas9 extremely effective as a genome editing reagent. This interplay... and thus, causes two types of editing outcomes: Cas9 breaks repaired by the non-homologous end-joining...
Showing: 21 - 30 of 284 results