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We narrowed to 26 results for: streptococcus -(crispr) -(cas9)

Showing: 1 - 20 of 26 results

  1. What's New in CRISPR - March 2020

    Type
    Blog Post
    ...blog Download the CRISPR 101 eBook Find our CRISPR 101 blog posts Read our CRISPR cheat sheet Resources...catalytically dead Cas9 (dCas9) derived from Streptococcus pasteurianus  or the type II CRISPR3 module of Streptococcus...the new CRISPR plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid... lower average Cas9-independent off-target DNA editing, ~5–50-fold lower levels of Cas9-dependent off-...Resources on Addgene.org Read our CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids...editing CRISPRi in Caulobacter crescentus Multiplexed gRNA for human pluripotent stem cells CRISPR-based...that this blog series will help you find more new CRISPR tools for your research! This time: Optogenetic...

  2. Components of CRISPR/Cas9

    Type
    Blog Post
    ...most basic level, CRISPR/Cas9 genome editing systems use a non-specific endonuclease (Cas9 or closely related...the major CRISPR lingo and will be able to describe the functions of the various CRISPR/Cas9 components...sequence, Cas9 will neither bind nor cut the target. Cas9 homologs from different organisms or Cas9 mutants...intended to provide a general overview of CRISPR components, new Cas9 variants are being discovered all the...increased targeting specificity). Cas9 endonuclease functions While native CRISPR/Cas systems have a variety ...for genome engineering, the only CRISPR protein required is the Cas9 endonuclease or a variant thereof...the PAM sequence. Cas9 Species/Variants and PAM Sequences Species/Variant of Cas9 PAM Sequence ...

  3. What's New in CRISPR - Winter 2018

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    Blog Post
    ...dual-nuclease Cas9-Cas9 chimeras Scot Wolfe’s lab has developed dual-nuclease Cas9-Cas9 chimeras with ...Cas14 plasmids Anti-CRISPR proteins for optogenetic control of CRISPR-Cas9 Anti-CRISPR proteins that inhibit...anti-CRISPR proteins for optogenetic control of CRISPR-Cas9. By combining AcrIIA4, a Streptococcus pyogenes...compared to monomeric Cas9’s. Read the paper in Nature Communications Find the Cas9-Cas9 chimera plasmids...blog Download the CRISPR 101 eBook Find our CRISPR 101 blog posts Read our CRISPR cheat sheet Resources...the new CRISPR plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid...Resources on Addgene.org Read our CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids...

  4. Overcoming the AAV Size Limitation for CRISPR Delivery

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    Blog Post
    ... Learn more about Cas9 Variants and the Expanded CRISPR Toolbox Read about CRISPR enzyme Cpf1 Read our...one AAV, Cas9 must be made smaller. Previous attempts to “shrink” Cas9 include the use of St1Cas9 (~3.3 ...toxicity. More AAV-based CRISPR systems Smaller Cas proteins SaCas9 isn't the only CRISPR enzyme that’s small...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...for in vivo studies. One of the pitfalls of CRISPR/Cas9 genome editing is the potential for off-target effects...

  5. The PAM Requirement and Expanding CRISPR Beyond SpCas9

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    Blog Post
    ...dramatically increase the number of CRISPR applications. The first non-Cas9 CRISPR protein adapted for genome ...VQR, EQR and VRER SpCas9 variants effectively double the targeting range of CRISPR/Cas9 within the human...as a binding signal for Cas9 and this sequence is a strict requirement for Cas9-mediated DNA cleavage. ...of novel S. pyogenes Cas9 variants with varying PAM sequences, 2) the use of Cas9 homologs derived from...2020). Characterization of Cas9 from additional bacterial species Many more Cas9 orthologs have been isolated...same species. Expanding the CRISPR toolbox The isolation of novel CRISPR proteins has and will continue...trying to decide which CRISPR tools are best for your experiment, check out our CRISPR guide or leave a comment...

  6. What's New in CRISPR - December 2019

    Type
    Blog Post
    ...blog Download the CRISPR 101 eBook Find our CRISPR 101 blog posts Read our CRISPR cheat sheet Resources...more new CRISPR tools for your research! This time: CRISPRi in Burkholderia Base editors CRISPR toolkit...the new CRISPR plasmids available at Addgene. We will still periodically focus on specific CRISPR plasmid...Read the paper in bioRxiv Find Target-ACE   CRISPR/Cas9-based toolkit for epitope tagging in neurons ...capsid-based bionanoparticle Transient expression of CRISPR/Cas9 in cells has advantages like reduced off-target...Resources on Addgene.org Read our CRISPR guide Find CRISPR plasmids by function Find recently deposited plasmids...deaminase (TadA) to a catalytically impaired Streptococcus pyogenes Cas9. They called this editor Target-ACE (...

  7. Generating Mouse Models Using CRISPR/Cas9

    Type
    Blog Post
    ...widely used CRISPR genome editing system derived from Streptococcus pyogenes. An alternative Cas9, from Streptococcus... guest bloggers, Wenning Qin and Haoyi Wang. CRISPR/Cas9 is revolutionizing the mouse gene-targeting field...than ever to manipulate the mouse genome using CRISPR/Cas9. Similar to the human genome, the mouse genome...Crossing Mice. My first CRISPR mouse experiment Everything changed with the advent of CRISPR in 2013 (Cong et...robust in performance. In its natural setting, CRISPR-Cas9 is an acquired immune system in bacteria and ...knock in models). CRISPR mouse model basics To create a mouse model, the gRNA, Cas9, and donor oligonucleotide... AAV can also be used as a vector to deliver CRISPR/Cas9 either through injection into either an oocyte...

  8. Your Top Requested Plasmid in 2016!

    Type
    Blog Post
    ...of mammalian cell lines. Cas9, of course, is the key component of most CRISPR systems and generates double...F. Ann, et al. "Genome engineering using the CRISPR-Cas9 system." Nature protocols 8.11 (2013): 2281-2308...on the Addgene Blog Browse Our CRISPR Posts Learn about Using CRISPR to Generate Knockouts Read Some ...Deliver CRISPR Plasmids to Mammalian Cells Resources on the Addgene Website Visit our CRISPR Guide Pages...plasmid expresses Streptococcus pyogenes (Sp) Cas9 from a Cbh promoter. Cbh is a modified version of CAG promoter... from 2016 is an expression vector for CRISPR nuclease, SpCas9 from the Zhang Lab. It's name, though a...cleaving" peptide causes the ribosome to translate Cas9-2A and the Puromycin resistance gene as separate...

  9. Some Like it Hot: Thermostable GeoCas9

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    Blog Post
    ...Read about CRISPR Methods for Bacterial Genome Engineering   Interested in using CRISPR/Cas9 RNPs? Check...discovery of GeoCas9 by the Doudna lab has opened up the field of thermophilic bacteria to CRISPR/Cas9 genome...human plasma. The discovery of GeoCas9 clears the way for CRISPR/Cas9 genome editing in facultative and...heat loving) bacteria, such as Streptococcus pyogene’s SpCas9. These Cas9 proteins don’t work well at high...Other Blog Posts on CRISPR Additional Resources on Addgene.org Brush Up on Your CRISPR Background with ...Addgene’s CRISPR Guide Page Find CRISPR plasmids at Addgene ... 1. Comparing SpCas9 and GeoCas9. *For in vitro Cas9 RNP activity or longevity. GeoCas9 is active at high...

  10. Choosing a CRISPR Nuclease: Site Accessibility, Specificity, and Sensitivity

    Type
    Blog Post
    ...frequently used Cas9, spCas9 from Streptococcus pyogenes, this sequence is 3’-NGG. But Cas9s found in other.... Recent alternatives to Cas9 While Cas9 remains the most widely used CRISPR nuclease, recent work has...Addgene.org Visit our CRISPR plasmids and resources page Read our CRISPR guide Find CRISPR plasmids for mammalian...accessible by Cas9. Our previous blog post The PAM Requirement and Expanding CRISPR Beyond SpCas9 described...published a blog post titled: Which Cas9 Do I Choose for My CRISPR Experiment? The three years flew by...assessment of the off-target activity of Cas9. This can occur when Cas9 cleaves a site that is not a perfect...the PAM specificity of Cas9s isolated from different organisms and engineered Cas9 variants that were able...

  11. CRISPR Methods for Bacteria: Genome Engineering, CRISPRa, CRISPRi, Base Editing, and More

    Type
    Blog Post
    ...pCRISPomyces-1 includes Cas9, a tracrRNA, and a CRISPR array, while pCRISPomyces-2 contains Cas9 and a gRNA cassette...functions more similarly to CRISPR/Cas9 systems adapted for eukaryotes in that Cas9-mediated cleavage induces...multi-spacer CRISPR array, CRISPR-transposons can be multiplexed. Transcriptional repression (CRISPRi) in bacteria...Will Arnold. Although CRISPR systems were first discovered in bacteria, most CRISPR-based genome engineering...inefficiency? Use CRISPR to make it a selectable process! As NHEJ is ineffective in bacteria, CRISPR-induced double...eukaryotes in that CRISPR isn’t the primary editing force. In contrast, in E. coli, CRISPR is primarily a ...to directly modify a given gene. CRISPR-tranposons By combining CRISPR editing and transposons, the Sternberg...

  12. CRISPR 101: Anti-CRISPR Proteins Switch Off CRISPR-Cas Systems

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    Blog Post
    ...While Streptococcus pyogenes Cas9 (SpyCas9) is the most used and well studied CRISPR system, N. meningitidis...over 50 anti-CRISPR proteins that interact with CRISPR-Cas systems such as Cascade-Cas3, Cas9, Cas12, and... do anti-CRISPR proteins work? Anti-CRISPRs proteins are highly diverse but most block CRISPR activity... off CRISPR activity. The ability to turn off CRISPR activity is an important step towards CRISPR-based...Adenovirus Vector Expressing Anti-CRISPR Peptides Decreases CRISPR/Cas9 Toxicity in Human Hematopoietic ...Z (2017) Structural basis of CRISPR–SpyCas9 inhibition by an anti-CRISPR protein. Nature 546:436–439 ..... Discovery of anti-CRISPR proteins That is, until the discovery of anti-CRISPR proteins in 2012 (Bondy-Denomy...

  13. Hot Plasmids - September 2019 - CRISPR, Auxin Inducible Degradation, MerMAID Channelrhodopsins, and Genome Looping

    Type
    Blog Post
    ...sequence targeted by the Cas9 nuclease. The Streptococcus pyogenes Cas9 (SpCas9) requires an NGG PAM to...range of CRISPRCas9 by engineering SpCas9 Article contributed by Shreya Vedantam CRISPR/Cas9 is widely...2016).  The Kanemaki lab previously developed a CRISPR/Cas9 based method to tag endogenous proteins in HCT116...and other tags (Yesbolatova et al., 2019) using CRISPR. This toolkit makes it easy to tag your protein...widely used genome editing tool. However, Cas9’s endonuclease activity can be limited by the need for a specific...recognize the target. Osamu Nureki’s lab engineered SpCas9 (SpCas9-NG) with relaxed preferences for the third ...NGG. In addition to the engineered SpCas9, they also fused the SpCas9-NG with the activation-induced cytidine...

  14. 15 Years of Addgene: The Top 15 Plasmids

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    Blog Post
    ....G. pSpCas9(BB)-2A-GFP (PX458) - This plasmid from the Zhang lab expresses Cas9 from Streptococcus pyogenes...other CRISPR plasmids are from the Zhang lab. In fact, the Zhang lab has shared over 40,000 CRISPR-Cas9...Addgene!) pX330-U6-Chimeric_BB-CBh-hSpCas9 - The S. pyogenes Cas9 (SpCas9) has been widely popular in genome... with lentiCas9-Blast or with cell lines already expressing Cas9. Find lentiGuide-Puro. pSpCas9n(BB)-2A-GFP... Similar to pSpCas9(BB)-2A-Puro (PX458), pSpCas9n(BB)-2A-GFP (PX461) expresses both a Cas9 protein and...makes lentiCRISPR v2 great? It produces a ~10 fold higher titer virus, making it ideal for CRISPR pooled...and a gRNA. But instead of Cas9, this plasmid expresses Cas9n (a D10A nickase mutant) to nick, rather than...

  15. Truncated gRNAs for Regulating Gene Expression

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    Blog Post
    ...Institute for Biologically Inspired Engineering. CRISPR/Cas9 technology has revolutionized the fields of molecular... gRNA, Cas9 binds the target site, but does not cut either strand of DNA. Traditional Cas9 regulators... a potent Cas9-based transcriptional regulator without making any functional changes to Cas9. For instance...repression with nuclease-competent Cas9. When complexed with a truncated gRNA, Cas9 is still able to bind DNA ...tight control over Cas9 nuclease activity while eliminating the reliance on orthogonal Cas9 species. Within...PMC3844869. 2. Chari, Raj, et al. "Unraveling CRISPR-Cas9 genome engineering parameters via a library-on-library...PMCID: PMC4747789. 6. Platt, Randall J., et al. "CRISPR-Cas9 knockin mice for genome editing and cancer modeling...

  16. Hot Plasmids - October 2020

    Type
    Blog Post
    ....107804 The CRISPR corner By Jennifer Tsang Here are a few highlights from recent CRISPR plasmids. To...To find all of the CRISPR plasmids available from Addgene, head over to our CRISPR Plasmids and Resources... Addgene The Human GlycoGene CRISPR Library is a new lentiviral CRISPR library that targets human glycosyltransferase... Sc++ is a codon-optimized, engineered Streptococcus canis Cas9 nuclease that has a broad 5′-NNG-3′ PAM...Fluorescent timers for studying cell cycle length The CRISPR corner New from the viral service Labeling excitatory...arrays can lead to artifacts due to overexpression. CRISPR can insert the FP gene into the target gene’s native...introducing large genetic changes in C. elegans with CRISPR can be difficult since it requires the much less...

  17. A Needle in a Base-Stack: Cas9 Structural Biology

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    Blog Post
    ...engineered CRISPR enzymes with their own tradeoffs. And this article only covered Cas9! Other CRISPR enzymes...Addgene's CRISPR Guide Addgene's CRISPR 101 eBook  Resources on the Addgene blog Components of CRISPR  xCas9...the basic parts of the Cas9 enzyme.   Figure 1: A cartoon depiction of Cas9’s two major lobes, REC...completely unique to the CRISPR system (Nishimasu et al., 2014). Table 1. Summary of Cas9 domains, the lobe ...   Unbound Cas9 Now that we know what we’re looking at, let’s peek at unbound—“apo”—Cas9 from Streptococcus...Figure 8: Comparison of Cas9:RNA crystal structure (left, PDB ID 4ZT0) with Cas9:RNA:DNA electron microscopy...xCas9: Engineering a CRISPR Variant with PAM Flexibility Cas9 vs the Other Cases Further reading Wang, J...

  18. Typing CRISPR Systems

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    Blog Post
    ...blog CRISPR 101: Cas9 vs. The Other Cas(s) CRISPR 101: RNA Editing with Cas13 Build your CRISPR vocabulary...Additional resources on Addgene.org CRISPR guide CRISPR plasmids CRISPR references ...first time. The discovery and application of CRISPR-Cas9 kicked off over a decade of frenzied interest...Classification Structure Principles of CRISPR classification While CRISPR systems now seem neatly organized...versus class 2 There are two CRISPR classes: Class 1 and Class 2. Class 1 CRISPR systems use multi-Cas effectors..., like Cas9. The Cascade complex doesn’t usually carry out the function of the specific CRISPR type but... Type I CRISPR systems make up the majority of Class 1, and are the most common type of CRISPR overall...

  19. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    ... the ZFNs.   Genetic Engineering Era: Post CRISPR  CRISPR The strategy of using a protein to recognize... Find more blog posts about CRISPR Learn more about the history of CRISPR Read about other genome editing...methods Resources on Addgene.org Visit our CRISPR guide Find CRISPR plasmids for your research Browse plasmids... The new frontier of genome engineering with CRISPR-Cas9. Science 346:1258096 . https://doi.org/10.1126... Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nature Protocols 8:2281–2308 . https:...during this period.  Genetic Engineering Era: Pre-CRISPR  Having visualized and understood the DNA, the ...breakthrough in the world of genetic engineering as CRISPR-Cas editing soon replaced the protein-based DNA-binding...

  20. 15 Hot Plasmids from 2017

    Type
    Blog Post
    ...podcast segment on CRISPR tools for plants CRISPR inhibitors Bacteria utilize CRISPR Cas9 systems to defend...Ouabain New CRISPR base editors The popular CRISPR base editing technique uses dCas9/Cas9 nickase fused...to increase CRISPR editing efficiency across multiple CRISPR enzymes. Plasmids for CRISPR coselection ..., a base editor containing high fidelity Cas9 variant HF-Cas9. They subsequently tested the original BE3...-BE3  EQR-Cas9 (NGAG)  Lower off-target activity than BE3  85173  pBK-VRER-BE3  VRER-Cas9 (NGCG)   ...back using CRISPR inhibitors. Several such inhibitors have been characterized for type I CRISPR systems,... for the popular type II CRISPR systems, which include S. pyogenes (Spy) Cas9, been identified. In Rauch...
Showing: 1 - 20 of 26 results