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Showing: 151 - 175 of 175 results
  1. Bacterial Expression Systems

    Type
    Collection
    ...see here . pgRNA-bacteria 44251 CRISPR Stanley Qi Expression of customizable guide RNA (gRNA) for bacterial...can be combined with expression of a gRNA from a plasmid like pgRNA-bacteria to knock down endogenous gene...Marraffini Bacterial expression of Cas9 nuclease gRNA. For a more comprehensive list of our bacterial ...molecule, 3OC6HSL, from a promoter repressed by EsaR. Designed to be used with the pAC-EsaR Series . pAC-EsaR...
  2. CRISPR-mediated Plant Base Editors

    Type
    Blog Post
    ...expression system. We use a single polycistronic tRNA-gRNA (PTG) gene system to clone multiple protospacers... SpCas9-VRER TadA-TadA* NGCG 8  Tips for designing base editing experiments in plants Choose a base...
  3. SARS-CoV-2/COVID-19 Detection Methods Based on CRISPR/Cas

    Type
    Blog Post
    ...one temperature. Two Cas12a-crRNA complexes are designed, each binding to one strand of the reverse-transcribed... Cas13, upon finding complementarity between the gRNA and a given fluorescently labelled substrate, gets... E and the N2 gene of SARS-CoV-2. If the Cas12a-sgRNA complex binds to the target sequences, Cas12a activity...Fluorescently labelled dCas9 complexes containing sgRNA that have no mismatches bind to the immobilised ...
  4. Guide to Using Pooled Libraries

    Type
    Guide
    ...each plasmid contains a unique cDNA. In shRNA or gRNA libraries, each plasmid contains a unique gene targeting...effects of expressing multiple genes at once. A well-designed screen can help you begin to understand what genes...important to a certain phenotype, and allow you to design additional hypothesis-directed experiments. As ...tube. Pooled libraries can be small, if they are designed to cover only a subset of genes, or very large...library from the Moffat lab has over 175,000 different gRNA-containing plasmids). Amplifying and Using the Library... screen. The figure above is an outline of how a gRNA library is used. Below are the general steps to ...experimental and control cells Generate a list of gRNAs that disappear with addition of the selection mechanism...
  5. CRISPR 101: Epigenetics and Editing the Epigenome

    Type
    Blog Post
    ...certainly not the only CRISPR-based technology designed to alter gene expression. Fusing dCas9 to a transcriptional...Check out Our CRISPR Guide Pages Find Validated gRNAs to Target Your Genomic Locus of Interest Browse ...
  6. CRISPR 101: Cytosine Transversion Editors

    Type
    Blog Post
    ... Acronym Full name Notes CRISPR terms gRNA/sgRNA Guide RNA RNA used by Cas9 to locate a matching... the DNA strand that does not base pair with the gRNA. Base editors target this “non-target strand.” To... predicting CGBE editing outcomes and assisting sgRNA selection is available at http://www.sunlab.fun:... in different cell types, available at www.crisprbehive.design. CGBEs fused to pioneer factors to improve...
  7. New Optimized Genome-wide CRISPRko, CRISPRi, and CRISPRa Libraries

    Type
    Blog Post
    ...CRISPR library with 6 sgRNAS, highlighting the benefit of sgRNA design in CRISPR libraries. Thus, the Brunello...2018). These libraries utilize optimized sgRNAs that were designed based on the rules identified in Doench...gene and 1,000 non-coding control sgRNAs. This library was designed to improve on-target activity while...confirming again that sgRNA design plays a significant role in library efficiency. Try the Dolcetto library...uses an improved activator design that consists of inactive Cas9-VP64, a sgRNA with two MS2 RNA aptamers.... Doench, John G., et al. "Rational design of highly active sgRNAs for CRISPR-Cas9–mediated gene inactivation...MC4262738. 2. Doench, John G., et al. "Optimized sgRNA design to maximize activity and minimize off-target...
  8. Rewiring Metabolic Circuitry with CRISPR RNA Scaffolds [Video]

    Type
    Blog Post
    ...stepwise protocol on designing and using RNA scaffolds: Delebecque, C. J. et al. Designing and using RNA scaffolds... of transcriptional regulator or the number of designed scaffold binding sites. With hundreds of characterized...tunability of transcription is possible. From a design perspective, this is appealing since the RNA scaffold...pairing, allowing for rational, straightforward design. Since the technique relies on base pairing, it...and multidirectional multiplex control via scRNA design is readily apparent in metabolic engineering. The...targeted site. Multiple scaffold RNAs can be designed to allow simultaneous, multidirectional and tunable...activity coupled with a customizable single guide RNA (sgRNA) that bears complementarity to a 20bp target sequence...
  9. Genomic Deletions in Mammalian Cell Lines

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    Collection
    ...PDF posted at the top of the page. CRISPR Design Design sgRNAs manually or using freely available online... be 24-mer oligos ( Table 4 ). Design Deletion Screening Primers Design one set of primers internal to...not be impacted by a small indel at the sgRNA target site. Design additional primers to analyze for scarring...Here we present a simple methodology for CRISPR design, cloning, and delivery for the production of genomic...ng gDNA, and H 2 O up to 20 μl. Use the primers designed in step 2 above. Conduct PCR for “non-deletion.... Optimize PCR conditions for each primer pair designed based on testing the bulk sorted cells. Run samples...example, sgRNA-A’s protospacer sequence and PAM happen to fall on the bottom (Crick) strand while sgRNA-B’s...
  10. Uncovering Ancestral Bias in CRISPR Research

    Type
    Blog Post
    ...they designed a tool that could analyze CRISPR sgRNAs and report the likelihood of any given sgRNA having... guides used in the screens they analyzed were designed to have a perfect match to the reference genome...Brown from Broad's Genetic Perturbation Platform to design a new library that is agnostic to ancestry which...CRISpick algorithm to prevent guides from being designed that target regions with high genomic variability...actually an artifact introduced by bias within the design of the experiment or dataset itself. It is important...scientists to be aware of and actively use tools designed to help reduce or eliminate bias, just like the...indicating loci where SNPs reside on sgRNA target sequences for sgRNAs that target ancestry-associated genes...
  11. 28 Hot Plasmid Technologies from 2015

    Type
    Blog Post
    ... endogenous loci using validated gRNAs from Addgene and well designed homology directed repair templates...cell events Three years ago, Brian Kuhlman’s lab designed photoswitchable dimers by fusing the SsrA peptide...the authors recently used computational protein design, phage display and high throughput binding assays...gene is inserted. It is important that primers be designed to minimize the possibility of dimer formation...platform for imaging and flow cytometry applications Designing customized fluorescent reporters can be challenging...preposterous. Luckily, the Pierre Neveu laboratory designed a new iterative, chaining-based cloning method...the field of all-optical electrophysiology is designing the perfect voltage indicator and optogenetic ...
  12. Pooled CRISPR Libraries Offer Genome-Wide Control for Large-Scale Functional Screens

    Type
    Blog Post
    ...first generation of CRISPR-Cas9 plasmids were not designed with gene activation in mind. “We had not managed...from the structure to guide and improve activator design,” she said. “Before it was a little like tapping...instead of at the protein’s C terminus. With that new design in place, Konermann immediately saw an order of... activator (CRISPRa) sgRNA library uses the sunCas9 system and contains 10 sgRNAs for each transcription...nucleolytically inactive Cas9-VP64 fusion; 2. A sgRNA incorporating two MS2 RNA aptamers at the tetraloop...gain-of-function screening when combined with a compact pooled sgRNA library. Our SAM-mediated screens exhibited a high...transcriptional repressor (CRISPRi) library contains 10 sgRNAs for each transcription start site in those 15,977...
  13. Addgene's eBook Collection

    Type
    Guide
    ... for planning your CRISPR experiment and designing your gRNA and how to use pooled libraries in genome-wide...
  14. Hot Plasmids: Fall 2024

    Type
    Blog Post
    ...promising tool for future structure-guided drug design and studies of protein ubiquitination and degradation...CRBNmidi plasmid here!   Kroupova, A. et al. (2024). Design of a Cereblon construct for crystallographic and...specifically for C. elegans (Cao et al., 2024). The team designed coding sequences for mScarlet3 and mScarlet-I3...recombination methods). By using mCherry for selection of sgRNA plasmid transformants, they avoid M. abscessus’ ...Using an inducible Cas9 expression and removing the sgRNA plasmid after identifying successful knockouts limits... KanR. This strain is then transformed with the sgRNA cassette on a plasmid expressing mCherry and resistance... of the target gene. Lastly, curing the mCherry-sgRNA plasmid leaves an edited strain carrying Cas9 to...
  15. Hot Plasmids and Viral Preps - September 2021

    Type
    Blog Post
    ...without end-point sequencing assays.  This tool was designed by putting together the coding sequence of a mCherry...MYC-CRISPR library targets E-boxes genome-wide. It was designed based on MYC-ChIP-seq data from several MYC-dependent...Veening is now available with one sgRNA per operon or gene. The sgRNA pool can also target core operons... cell lines. The Turner Lab Human messenger-RBP sgRNA Library targets human mRNA binding proteins with...operons in other pneumococcal strains. The BARBEKO sgRNA library uses CRISPR cytosine base editors to disrupt...
  16. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    ...domain (FokI). Zinc finger nucleases were first designed in 2005. The DNA-binding domain can be engineered...editors, new amino acid recognition sites had to be designed each time we wanted to target new genomic sites...chasing an anti-villain geneticist named Zobrist who designs a virus that can potentially kill one-third of ... in genome editing is prime editing, which was designed in 2019. It’s based on a prime editor which is... Using an elongated template + guide RNA called pegRNA (prime editing RNA), the prime editor can install...
  17. Prime Editing: Adding Precision and Flexibility to CRISPR Editing

    Type
    Blog Post
    ...nicking increases indel formation slightly. Designing the sgRNA with a spacer that only binds the edited ...different constraints and affect how you select and design your prime editing tools. Here, we’ll briefly cover...engineered pegRNA” or epegRNA. Although the addition of the RNA pseudoknot sometimes altered epegRNA expression...does just this by including an additional sgRNA. Using this sgRNA, the prime editor nicks the unedited strand...4.0 license. epegRNAs: Structured RNAs with improved stability Traditional sgRNAs are protected from...degraded, the truncated pegRNA can still guide Cas9 and compete with full pegRNAs for access to the target... compared to PEmax with normal pegRNAs, but combining PE7 with epegRNAs resulted in similar or reduced...
  18. A Needle in a Base-Stack: Cas9 Structural Biology

    Type
    Blog Post
    ...Have you ever designed a CRISPR guide RNA and wondered why it is limited to only 20 bases, or why it’...understand the parameters of CRISPR experimental design. Let’s dive into some structural biology! Major...Once supplied with a guide RNA — whether it’s an sgRNA or a crRNA:tracrRNA duplex — Cas9’s two lobes move...yellow; REC lobe, light blue; bridge helix, purple; sgRNA, dark blue.   The REC lobe binds tightly to ...yellow; REC lobe, light blue; bridge helix, purple; sgRNA, dark blue.   DNA sequence recognition Once ...yellow; REC lobe, light blue; bridge helix, purple; sgRNA, dark blue; target DNA strand, light gray; non-target... and marks the transition back to a DNA duplex. sgRNA, dark blue; target DNA strand, light gray; non-target...
  19. Transgenic Organisms, Cas9 Gene Drives, and Appropriate Safeguards

    Type
    Blog Post
    ...one mistake can be enough. Reversal drives are designed to overwrite a previous gene drive and thereby...cassette encoding the cas9 gene and single guide RNAs (sgRNAs) with appropriate flanking homology into a germline...don't use a DNA vector that encodes both Cas9 and sgRNA. What if I want to work with gene drives? Then do...organisms but not wild organisms. For example, an sgRNA-only drive will spread exclusively through populations...express Cas9 from an unlinked locus, while a Cas9+sgRNA drive targeting a synthetic sequence will only spread...restore the wild-type sequence (save for the residual sgRNAs and possibly cas9 gene). An immunizing reversal...
  20. Hot Plasmids Spring 2024

    Type
    Blog Post
    ...elements. The team designed sgRNAs that include an internal barcode and separated multiple sgRNAs with tRNAs,...engineered pegRNAs (epegRNAs), which add a structural motif to stabilize the 3’ end of the pegRNA. As research...BFP2.     Figure 1: CROPseq-multi uses two sgRNAs with internal barcodes (iBARs), multiplexed using...lentiviral integration, producing a second copy of the sgRNAs. Image reused from Walton et al. 2024 under a CC-BY-NC-ND...occurs on the RNA polymerase III transcript, the sgRNAs were encoded on the lentiviral minus strand in ...of host cell proteins, and modifications to the pegRNA. The Britt Adamson Lab recently used a CRISPRi ...to La binding and stabilizing the 3’ end of the pegRNA, which is not well protected by Cas9. This is similar...
  21. Analyzing CRISPR Editing Results with ICE from Synthego

    Type
    Blog Post
    ..., which also includes our CRISPR knockout guide design tool, guide validation tool, and guaranteed editing...those generated by multiplexed delivery of multiple sgRNAs. Since multiplexing is commonly used to create ...helps the researcher see which of the multiplexed sgRNA was involved in a particular edit, and which type...
Showing: 151 - 175 of 175 results