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Showing: 31 - 60 of 77 results
  1. CRISPR-mediated Plant Base Editors

    Type
    Blog Post
    ...by tethering cytosine deaminase with Cas9 nickase (nCas9). nCas9 creates a nick in the DNA by cutting ...Nickase Cas9 (D10A) Deaminase PAM requirements Reference CBE SpCas9 rAPOBEC1 NGG 6 SpCas9 Target-AID...Bastian Minkenberg, and Yinong Yang. "Boosting CRISPR/Cas9 multiplex editing capability with the endogenous...Targeted base editing in rice and tomato using a CRISPR-Cas9 cytidine deaminase fusion." Nature biotechnology...Precise base editing in rice, wheat and maize with a Cas9-cytidine deaminase fusion." Nature biotechnology...Expanding the base editing scope in rice by using Cas9 variants." Plant biotechnology journal (2018). PubMed..."Expanded base editing in rice and wheat using a Cas9-adenosine deaminase fusion." Genome biology 19.1...
  2. Donations from Addgene to Yield Answers for Rare Disease Researchers

    Type
    Blog Post
    ...pluripotent stem cell (iPS) technology and CRISPR-Cas9 constructs from Addgene to gene-edit mutations into...looking at a bunch of different strategies with CRISPR-Cas9. There are so many different variants and strategies... of those mutations, they now plan to use CRISPR-Cas9 technology to create cell lines and/or mouse models...ve proposed to use plasmids with modified nickase Cas9 protein in order to target the specific gene region...the Rare Genomics Institute sponsors a global competition for researchers working on rare diseases, offering...
  3. Typing CRISPR Systems

    Type
    Blog Post
    ...–C, with the beloved SpCas9 (from Streptococcus pyogenes) belonging in II-A. Cas9 was the first to be ...first time. The discovery and application of CRISPR-Cas9 kicked off over a decade of frenzied interest in...while Class 2 use single protein Cas effectors, like Cas9. The Cascade complex doesn’t usually carry out the...type VI, each relying on a unique Cas effector — Cas9, Cas12, or Cas13. If you’d like to explore Class...most popular and well-known type, as this is where Cas9 falls. The mechanism of type II is, unsurprisingly... Figure 3: Schematic of the basic CRISPR-Cas9 mechanism, representing type II-A. Created with ...effectors and is one of the most popular alternatives to Cas9. Cas12 is unique because it can process multiple...
  4. CRISPR History and Development for Genome Engineering

    Type
    Collection
    ...High fidelity Cas9s: Three high fidelity Cas9 variants , SpCas9-HF, eSpCas9, and HypaCas9 display very ...III and Cas9 enzymes, which together separate the individual crRNAs. (3) The tracrRNA and Cas9 nuclease...Staphylococcus aureus (SaCas9) is smaller than SpCas9 and more easily packaged in AAV. Cas9 orthologs also have...beyond SpCas9, moving us closer to being able to target every locus in every genome. Multiple Cas9 orthologs...capability of Cas9 to make other types of modifications at specific loci. Activate or Repress : dCas9 fused to...Gonzales AP, Li Z, Peterson RT, Yeh JR, Aryee MJ, Joung JK. 2015. Engineered CRISPR-Cas9 nucleases with altered...the crRNA would bind. (5) After the complex binds, Cas9 separates the double stranded DNA target and cleaves...
  5. Site Directed Mutagenesis by PCR

    Type
    Blog Post
    ...critical for Cas9 cleavage), thereby rendering the resulting construct resistant to Cas9 induced cleavage...through homology-directed repair (HDR) of a CRISPR/Cas9 induced double-stranded break. This site-directed... the repair, the template should be resistant to Cas9 cleavage. If a plasmid contains the template, site-directed...footnote; a similar approach can be used to identify Cas9/CRISPR-induced genome modifications. Occasionally...your primers should be free of palindromic and repetitive sequences, but if present, a minor extension ...template should be isolated from a methylation competent bacterial strain (e.g. DH5α which is dam+). Methylation...
  6. Reaching out to China: Canton Nucleic Acids Forum (CNAF) 2015

    Type
    Blog Post
    ... tetracycline cas9 inducible knock-out system. His lab is also exploring the use of cas9 proteins from...proposes using bacterial phage vectors with CRISPR/cas9 sensitizing gene cassettes. Thse vectors are engineered...There are many clever ways labs are using CRISPR/cas9 and more are being reported. Zhou Songyang from ...pathways are involved in RNA based surveillance of repetitive gene families and provide a way to guide inheritance...
  7. CRISPR Plasmids - Mammalian Expression

    Type
    Collection
    ... to immunoprecipitate FLAG-tagged Cas9. In the CAPTURE system, Cas9 is tagged with a biotin acceptor site... Publication Purify A catalytically inactive Cas9 (dCas9) can be used to purify a region of genomic DNA...Publication Visualize A catalytically inactive Cas9 (dCas9) fused to a fluorescent protein (FP) can help...Promoter Selectable Marker Publication Prime Edit Cas9 H840A nickase fused to a reverse transcriptase (...PI Publication Interfere Catalytically dead dCas9, or dCas9 fused to a transcriptional repressor peptide...Editing Other Applications Purify Tag Visualize dCas9-FokI Screen Pooled Libraries gRNAs Empty gRNA Vectors... CRISPR Blog Posts Base Edit Catalytically dead dCas9 fused to a cytidine deaminase protein becomes a ...
  8. Viral Vectors 101: Integrase-Deficient Lentiviral Vectors

    Type
    Blog Post
    ...using CRISPR/Cas9 to edit a gene, the expression of Cas9 is no longer necessary. However, Cas9 can be toxic...like creating stable cell lines, delivering CRISPR/Cas9 to cells for genome editing, and introducing inducible...the production of lentiviral vectors that are competent for one round of infection (AKA transduction in...
  9. Video Library

    Type
    Protocol
    ... deletions in mammalian cells lines using CRISPR/Cas9 Genomic Deletions with CRISPR Protocol Over-Agar...Mulitchannel Pipetting Technique Learn how to pipette multiple samples at once using a multichannel pipette and...and avoid inconsistent pipetting with our simple tips Bacterial Transformations We walk you through a standard...
  10. PiggyBac-ing Through the Genome Editing Field

    Type
    Blog Post
    ...the development of site-specific nucleases (CRISPR/Cas9, TALENs, and ZFNs). However, several challenges ...piggyBac™ transposon system can be combined with CRISPR/Cas9 to efficiently perform genetic manipulations in ...along with a site-specific nuclease (such as CRISPR/Cas9) to create a double-stranded DNA break. After DNA...technologies including Zinc Fingers, TALENs, and CRISPR-Cas9 nucleases. Mathew applies his specialized knowledge...transposase (PBx), which contains mutations making it competent for excision, but defective for integration [4...
  11. Plasmids 101: Gibson Assembly and Other Long-Homology Based Cloning Methods

    Type
    Blog Post
    ...restriction enzyme or PCR to make linearized vector, the Cas9 enzyme along with a specific gRNA was used to cleave...Li K, Wang B, Jin S, Reiser M, Lockey RF. CRISPR/Cas9 nuclease cleavage combined with Gibson assembly ... Zhao X, Gabrieli T, Lou C, Ebenstein Y, Zhu TF. Cas9-Assisted Targeting of CHromosome segments CATCH ...sample is immediately ready to transform into competent cells. The master mix of enzymes can be purchased...master mix for 1 hour, and then transform into competent cells. The success rate of this reaction is typically...terminator sequence), since this would directly compete with the required single-stranded annealing and...
  12. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    ... the genome. They fused a catalytically impaired Cas9 protein to a DNA-editing enzyme to generate the ...based on a prime editor which is a fusion between Cas9 and reverse transcriptase. Using an elongated template...The new frontier of genome engineering with CRISPR-Cas9. Science 346:1258096 . https://doi.org/10.1126/science...Zhang F (2013) Genome engineering using the CRISPR-Cas9 system. Nature Protocols 8:2281–2308 . https://doi.org...successful in the box office, indicating the insatiable appetite of the moviegoers for dinosaurs wreaking havoc...
  13. Experimenting in an Open Source lab: from CRISPR to Cats

    Type
    Blog Post
    ...with  Addgene. We now have the incredible CRISPR/cas9 tools at our disposal to to modify the worm genome...be useful to our model  so that we can use CRISPR/cas9 to build the mutants, analyse their motor behaviour... a team at UVic to compete in iGem, an MIT-sponsored synthetic biology competition. In 2010, he founded...
  14. Visualizing Genomic Loci with CRISPR-Sirius

    Type
    Blog Post
    ...fluorescent protein to various Cas9 variants, SpCas9, NmCas9, and St1Cas9. These fusions localized to specific...The catalytically dead Cas9 protein (dCas9) is well known for its ability to bind DNA targets without...inhibition, among others. Over the past few years, dCas9 has also become a robust visualization tool to study...University of Massachusetts Medical School developed a dCas9-based multicolor labeling system to visualize chromosomal...this system out on chromosome 19 by targeting 46 repetitive loci that contained  ≥20 copies of the gRNA target... al. “Multiplexed labeling of genomic loci with dCas9 and engineered sgRNAs using CRISPRainbow.” Nature...
  15. The CRISPR Software Matchmaker: A New Tool for Choosing the Best CRISPR Software for Your Needs

    Type
    Blog Post
    ... tools yet. As a genome editing tool, the CRISPR/Cas9 technology has been surrounded by a whirlwind of... parasite Plasmodium falciparum using the CRISPR-Cas9 system." Nature biotechnology(2014). PubMed PMID... et al. "DNA targeting specificity of RNA-guided Cas9 nucleases." Nature biotechnology 31.9 (2013): 827...Rational design of highly active sgRNAs for CRISPR-Cas9-mediated gene inactivation." Nature biotechnology...speed up the sgRNA design process by removing repetitive tasks and/or by providing features to help with...with R. For the Java enthusiasts, take a look at sgRNAcas9. Top tools for transferring CRISPR technology ...
  16. CRISPR Plasmids for Genomic Visualization

    Type
    Collection
    ... inactive Cas9 (dCas9) fused to a fluorescent marker like GFP, researchers have turned dCas9 into a customizable...has been used for dynamic tracking of repetitive and non-repetitive genomic loci, as well as chromosome ...Editing Other Applications Purify Tag Visualize dCas9-FokI Screen Pooled Libraries gRNAs Empty gRNA Vectors...given region. For example, chromosome-specific repetitive loci can be efficiently visualized in living ... targeted sequences in close proximity. A non-repetitive genomic locus can also be labeled by co-delivering...
  17. Addgene’s Top 10 Blog Posts from 2014

    Type
    Blog Post
    ...Plasmids 101: Yeast Vectors By Marcy Patrick CRISPR-Cas9 FAQs Answered! By Caroline LaManna Plasmids 101...learn more about. Our post on “Making Your Own Competent Cells” has been extremely popular, generating ...Morgan Save Time and Money by Making Your Own Competent Cells By Melina Fan Plasmids 101: The Promoter...
  18. INTEGRATE: Bacterial Genome Engineering Using CRISPR-Transposons

    Type
    Blog Post
    ...effectors employed by Type II systems (such as CRISPR-Cas9). Unlike in regular Type I CRISPR-Cas systems, however...bacteria, alongside more established tools such as Cas9-recombineering, CRISPRa/i, and base editing. Leveraging...CRISPR-transposons by the Sternberg and Zhang labs (Peters et al., 2017; Klompe et al., 2019; Strecker et ...225 . https://doi.org/10.1038/s41586-019-1323-z Peters JE, Makarova KS, Shmakov S, Koonin EV (2017) Recruitment...
  19. Hot Plasmids and Viral Preps - January 2021

    Type
    Blog Post
    ... ~70kDa, with a molecular weight roughly half of Cas9 or Cas12a. This is in part due to the fact that ...CRISPR Plasmids and Resources page.  CDDR (CRISPR–Cas9-based Dual-fluorescent DSB Repair) is a double-strand...cells. Casɸ from Biggiephage can eliminate competing mobile genetic elements. Image by Basem Al-Shayeb...by Kivanc Birsoy. Find the library here A new SaCas9 ABE variant (microABEI744) has improved on-target...footprint compared to current N-terminal linked SaCas9 ABE variants. It's also one of the smallest AAV-deliverable...
  20. PRIDICT: Predicting Efficiencies of Prime Editing Guide RNAs

    Type
    Blog Post
    ...2023). This method uses a prime editor (typically a Cas9 H840A nickase fused to a reverse transcriptase) ...Steensel, B. (2021). Impact of chromatin context on Cas9-induced DNA double-strand break repair pathway balance...Yoon, S., & Kim, H. H. (2019). SpCas9 activity prediction by DeepSpCas9, a deep learning–based model with... and PE5 prime editing strategies) based on a DeepSpCas9 score ranking (Kim et al., 2019). PRIDICT saves.... M., Pallaseni, A., Kuzmin, I., Raudvere, U., Peterson, H., Liberante, F. G., & Parts, L. (2023). Prediction...
  21. Neurodegeneration Plasmid Collection

    Type
    Collection
    ...Gideon Dreyfuss 71875 pET-Sac-Abeta(M1-42) APP T7 Alzheimer's Dominic Walsh 71876 pET-Sac-Abeta(M1-40) APP...Bruce Beutler 127151 pET-Sac-Abeta(MC1-42) APP T7 Alzheimer's James Nowick 127152 pET-Sac-Abeta(MC1-40) ... 190191 pET-Duet1-His-TEV-mCherry-OPTN WT OPTN His, TEV, mCherry ALS Sascha Martens 190192 pET-Duet1-6xHis-TEV-OPTN...sgHTT1-7sk-sgCas9 HTT U6, 7sk Huntington's Nicole Deglon 190901 pAAVss-U6-sgHTT51-7sk-Cas9 HTT U6, 7sk...GFP CMV Spinal muscular atrophy Greg Matera 38005 pET-21a(+)/MBP-His-PINK1 PINK1 His, MBP T7 Parkinson'...IDR-mCherry-Cry2-NLS TBP Parkinson's Denes Hnisz 145283 pET-45b-TBP(38Q)-IDR-mCherry TBP Parkinson's Denes Hnisz...CMV Ataxia telangiectasia Charles Swanton 173759 pET-Sac-Abeta(M1-42/C18C33) APP T7 Alzheimer's James ...
  22. Adeno-associated virus (AAV) Guide

    Type
    Guide
    ...plasmids available from Addgene. The popular CRISPR/Cas9 genome editing system has been modified for use ...use in AAV, or containing Staphylococcus aureus (SaCas9) . AAV is also a promising method for gene therapy... at a much lower frequency. As a replication-incompetent virus, AAV cannot enter the lytic cycle without...
  23. Virus Protocol - Generating Stable Cell Lines

    Type
    Protocol
    ...A549 cells stably expressing Cas9. A549 cells were transduced with lentiCas9-Blast and then selected with...single channel pipette 2–20 µL single channel pipette 20–200 µL single channel pipette 200–1000 µL single...single channel pipette Ice bucket CO 2 incubator Pipet controller Hazardous waste container Reagents DMEM...DMEM complete + 10 µg/mL polybrene. Mix well by pipetting or inverting the tube. Aliquot 1 mL of cell suspension...formed by expansion of single cells for 13 days. lentiCas9-Blast was a gift from Feng Zhang (Addgene plasmid...
  24. Cultivating Community Science at BosLab

    Type
    Blog Post
    ...journal club discussion on Kevin Esvelt’s CRISPR/Cas9 gene drive paper was very popular. People kept asking...filing cabinets, a rickety old incubator, a few pipettes, and some home-made equipment. It was humble in...year with a computer science degree and had zero pipetting experience. However, after a few months of dedicated...
  25. Cloning Mammalian Cells with the Agarose Method

    Type
    Blog Post
    ...well plate for further analysis. To assess CRISPR/Cas9 knockout efficacy, we have used both Western blotting...200 ul pipettor is set to 200 ul, wiped down with 70% ethanol, and a box of sterile truncated pipet tips...the pipettor, placed into wells, and partially dislodged from the agarose plug by rapid pipetting, as ...rapidly punch out cell clones with sterile truncated pipet tips. Indeed, an experienced operator can pick 48.... We highly recommend the use of an electronic pipettor with variable spacing (such as the Viaflo from...
  26. Pooled Library Amplifications

    Type
    Blog Post
    ...   For CRISPR libraries, Genome-scale CRISPR-Cas9 knockout and transcriptional activation screening...plasmids, they are generally electroporated into electrocompetent cells to ensure the highest possible transformation...use for your transformation(s). The amount of competent cells you need total and per transformation may...liquid culture, all of the bacteria can grow and compete in the same container, making it easier for a smaller...be its own colony, and will not be in direct competition with other colonies containing smaller, recombined...recommend ensuring the cells used are meant for repetitive sequences (such as STBL4 or Endura Duo), growing...
  27. Overcoming the Challenges of Lentiviral Production

    Type
    Blog Post
    ...single 72h harvest is best for larger genes such as Cas9. See figure 1 for an example of how changing transfection... formation of replication competent lentivirus (RCL). Replication competence can arise from recombination...
  28. Uncovering Ancestral Bias in CRISPR Research

    Type
    Blog Post
    ... the guide from binding to the genome or prevent Cas9 from cutting, both of which can introduce significant...mapped to a SNP would be ignored. Working with Lia Petronio and Katherine Huang from Broad’s Pattern team,...between biology and ancestry group as a means of perpetuating racial bias. It is easy, even unintentionally...Noorbakhsh, Isabella Boyle, Joshua Dempster, Lia Petronio, Katherine Huang, Alham Saadat, Thomas Green, ...
Showing: 31 - 60 of 77 results