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We narrowed to 535 results for: genome

Showing: 141 - 160 of 535 results

  1. CRISPR 101: Off-Target Effects

    Type
    Blog Post
    ...mechanisms. The RNA guide is typically 20 nts and the genomic locus must often be proximal to a PAM site for ...gRNA with low sequence similarity elsewhere in the genome. There are many predictive online tools which can...gRNA with low sequence similarity elsewhere in the genome to reduce off-targets, it is time to consider your...Even if there are similar sequences present in the genome, certain Cas enzymes are less compatible with the...several options to quantify these events. Whole genome sequencing The only way to quantify off-target ...off-target effects entirely is to perform whole genome sequencing. While this may be unnecessary for many applications...gRNA which doesn’t perfectly match any site in the genome. While this may effectively serve as a transfection...

  2. What's New in CRISPR - December 2019

    Type
    Blog Post
    ...for the Application of Neuronal Genome Editing) mediates targeted genomic integration of fluorescent tags... editors, which decrease the rate of off-target genome edits compared to rat APOBEC1. Now, they’ve engineered... developed a CRISPR-based toolkit for targeted genomic integration of fluorescent tags in neurons. Their...

  3. Another Pathway into Cells: iTOP

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    Blog Post
    ...method and its potential applications to CRISPR/Cas9 genome editing.   Protein-only transduction? Niels Geijsen...see if iTOP would be compatible with CRISPR/Cas9 genome editing. Although CRISPR/Cas9 is all the rage, ...mutations and gene expression changes elsewhere in the genome. Second, expression is by nature transient, which... these reasons, iTOP, especially in tandem with genome editing, may make primary cell work much more efficient... genome editing...

  4. Nanoblades: Tiny CRISPR Ninjas for Genome Editing Difficult Cells

    Type
    Blog Post
    ...and accessible genome editing tool.   References Mangeot, Philippe E., et al. "Genome editing in primary...CRISPR is a simple and versatile tool for genome engineering, but its utility is dependent on its ability...) virus-like particles (VLPs). VLPs lack viral genomes which means they are non-infectious and non-replicative...Nanoblades? Plasmids are available from Addgene. Genome editing primary cells with Nanoblades Primary cells...

  5. CRISPR Kinome Libraries Available: Pooled and Individual Plasmid Formats

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    Blog Post
    ...scale. Or you don’t have enough cells to execute genome-wide perturbations. So, while some might argue ...mouse and human kinomes. While any subset of the genome is limited by definition, the kinome is a well-...as opposed to the 70,000 or more gRNAs found in genome-wide libraries, and thus can be screened in pooled...Resources on the Addgene Blog Learn to Conduct Genome-wide Screens with CRISPR/Cas9 Get John Doench's...

  6. Prime Editing: Adding Precision and Flexibility to CRISPR Editing

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    Blog Post
    ...cataloged in the ClinVar database. Previously developed genome editing methods using nucleases and base editors... published in Nature, is a “search-and-replace” genome editing technique that mediates targeted insertions...also encodes the desired edit and homology to the genomic DNA locus. After nicking by Cas9, the homologous...location The prime editor extends the reach of CRISPR genome editing, as it can edit near to or far from PAM... Fyodor Urnov refers to as “PAM deserts” in the genome. More versatile and precise than base editing (...achieve the best efficiency. The type of edit, genomic context, delivery strategy, cell type, and goal...(though up to 45-fold) higher across different genomic sites compared to PE1 (Anzalone et al., 2019). ...

  7. Introducing Addgene's Microbiology Pages

    Type
    Blog Post
    ...Check out our Genome Engineering Overview and our CRISPR guide to find out how to use genome editing techniques...explaining how CRISPR is being used for bacterial genome engineering. To make it easier for you to find...

  8. CRISPR 101: Targeting Non-Coding RNAs with CRISPR/Cas9

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    Blog Post
    ...our genome is made of protein-coding genes, and you might be wondering what the rest of our genome could...splice sites. (C) Removal of an exon or a large genomic fragment. (D) Knock-in: insertion of a synthetic...with specific chromatin structures or other local genomic elements (Hazan and Bester 2021). Other Cas variants...doi:10.1038/s41587-020-0428-0 Rinn JL, Chang HY. Genome Regulation by Long Noncoding RNAs. Annual Review...annurev-biochem-051410-092902 Liu Y, Cao Z, Wang Y, et al. Genome-wide screening for functional long noncoding RNAs...

  9. Adenoviral Vector Production and Troubleshooting

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    Blog Post
    ... inner core which contains the adenoviral genome. The genome itself is a linear double-stranded DNA of...dividing cells, and do not integrate into the host’s genome. The main challenge with using AdV is that it triggers... have done significant work to improve the Adv genome’s utility in research and its therapeutic potential...proteins: fiber, penton and hexon proteins. The viral genome DNA is further protected by histone-like proteins...10 days) Physical titer (particle count, rAdV genomes/mL) can be measured by: Optical density: particle...

  10. Mobile-CRISPRi: Bringing CRISPRi to Diverse Bacteria

    Type
    Blog Post
    ...transferred, Mobile-CRISPRi stably integrates into the genome and is propagated during normal DNA replication...element is first introduced into the B. subtilis genome. Mobile-CRISPRi is then transferred from B. subtilis...mating. Following excision from the B. subtilis genome, the Mobile-CRISPRi ICE element forms a conjugative... downstream of the glmS gene in the recipient's genome. Antibiotic plates lacking DAP select against donor...colonies. Higher transfer rates are better suited for genome-wide CRISPRi library screening experiments where... Learn about other CRISPR methods for bacterial genome engineering   Learn about human CRISPRko, CRISPRi...

  11. A New Generation of Adenine Base Editors Improves Editing in Primary Human Cells

    Type
    Blog Post
    ...that targets the complex of TadA and dCas to the genomic DNA of interest  Figure 1. When ABEs are... pyogenes Cas9 requires the target site in the genomic DNA to contain a specific protospacer adjacent ...ABE8 could target many additional locations in the genome. Compared to ABE7.10, NG-ABE8.xm/d showed a 1.6x... 8 selected ABE8s and ABE7.10. They quantified genomic editing by measuring the reduction in protein expression...note, ABE8s reported in this work did not cause genome-wide, guide-independent off-target deamination,...2017) Programmable base editing of A•T to G•C in genomic DNA without DNA cleavage. Nature 551:464–471 . ...

  12. Truncated gRNAs for Regulating Gene Expression

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    Blog Post
    ...complementary to the target site, or protospacer, in the genome. Native Cas9 has two catalytic domains, each of...of gene expression is observed in the absence of genome editing (Fig. 2 and 3) (5, 3). Figure 2:.... 2. Chari, Raj, et al. "Unraveling CRISPR-Cas9 genome engineering parameters via a library-on-library...Kiani, Samira, et al. "Cas9 gRNA engineering for genome editing, activation and repression." Nature methods...PMC4666719. 4. Mali, Prashant, et al. "RNA-guided human genome engineering via Cas9." Science 339.6121 (2013):...Randall J., et al. "CRISPR-Cas9 knockin mice for genome editing and cancer modeling." Cell 159.2 (2014)...

  13. CRISPR Cheat Sheet

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    Blog Post
    ...bacterial immune system. Genome Editing: Modifying the DNA sequence of an organism’s genome usually for a research... genome editing...

  14. Celebrating Outstanding CRISPR/Cas9 Achievements at the Dr. Paul Janssen Award Dinner

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    Blog Post
    ... will be bestowed upon discovers of CRISPR/Cas9 genome engineering, Dr. Jennifer Doudna and Dr. Emmanuelle...and its potential applications in rewriting the genome. Their award acceptance addresses were inspiring...discussed how J&J is already modifying cell and animal genomes to test hypotheses of disease. They are finding...more about safety and more about the how to use genome edited stem cells to treat disease. As for me, ...

  15. Viral Vectors 101: Viral Applications

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    Blog Post
    ...genetic payload. This cargo is typically their own genome, but this step can be engineered to be anything... then be either permanently integrated into the genome of the target cell or transiently expressed. It...higher than traditional transfection and random genomic integration of a plasmid. Viral transduction is...These libraries include sgRNAs targeting the entire genome, overexpression of all human transcription factors...Adenoviral Delivery of CRISPR/Cas9 Aims to Expand Genome Editing to Primary Cells Additional Resources ...

  16. All in a Twist: dsRNA

    Type
    Blog Post
    ...good. RNA:RNA dsRNA and viral infection Viral genomes come in all sorts of shapes and sizes. Many are...mitochondria. These organelles have their own circular genomes which can produce dsRNA as a result of bidirectional...regions, such as telomeres and centromeres. These genomic regions are prone to persistent R-loop formation...damage, and these structures can in turn lead to genome instability. Thus, it’s important to strike a balance...Human proteins that interact with RNA/DNA hybrids. Genome Res., 28(9): 1405-1414 (2018). 10.1101/gr.237362.118...

  17. Stabilized Bacterial Promoters: Constant Gene Expression at any Copy Number

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    Blog Post
    ...set of problems. Rapidly dividing cells initiate genome replication more than once per cell division and...constitutive promoters drove maximal gene expression near genomic origins of replication, the stabilized promoters...equivalent whether the genes were expressed from the genome or a plasmid. Thus, a stabilized promoter can allow...allow a system to be moved from a plasmid to the genome without greatly impacting the level of gene expression...constitutive promoter and then moved them into the genome, deoxychromoviridans production titers decreased...

  18. Plasmids 101: Transformation, Transduction, Bacterial Conjugation, and Transfection

    Type
    Blog Post
    ...into the genome and stable cell lines, where foreign DNA is incorporated into the cell’s genome and is ...genetic material is incorporated into the host’s genome at a particular integration site. The integrated..., or it can integrate into the host bacterium’s genome through homologous or site directed recombination...sequences of interest into a bacterial cell or a host’s genome. To do this scientists commonly use phagemids, ...

  19. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

    Type
    Blog Post
    ...the short time since its development, CRISPR/Cas9 genome editing has been used to study the effect of gene...expression of gRNAs from these constructs could lower genome editing efficiency. One previous strategy for... rice protoplasts. Each pair of gRNAs targeted genomic sites separated by 350-750 bp, allowing them to...CRISPR/Cas9 shows great potential for multiplexed genome editing. Interested in using PTG plasmids in your...CRISPR RNA-guided FokI nucleases for highly specific genome editing. Tsai SQ, Wyvekens N, Khayter C, Foden ...
Showing: 141 - 160 of 535 results