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Showing: 101 - 120 of 419 results
  1. Twenty Years of Addgene Sharing: CRISPR

    Type
    Blog Post
    ...CRISPR plasmids containing a nuclease into three functional groups: nucleases, modulators, and chimeric ...chimeric effectors. Nucleases generate a classic double-stranded break, while modulators regulate transcription...function, from 2014 to 2023. As you can see, nucleases, the original CRISPR tool, remain the most popular...
  2. PITChing MMEJ as an Alternative Route for Gene Editing

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    Blog Post
    ...such a system is likely to introduce additional nucleotides flanking the insertion. If the DNA ends anneal...MMEJ may also introduce, substitute, or delete nucleotides in addition to the expected deletion, but the...compare to CRISPR sticky-end insertion using the nuclease Cpf1. Since Cpf1 cuts in a staggered pattern, ...this editing platform lies in the diversity of nucleases and their applications. It will be interesting...
  3. Hot Plasmids - August 2020

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    Blog Post
    ...improve nuclear localization of fluorescent proteins, they found that adding a triple nuclear localization...protease allows a transcription factor to enter the nucleus and modulate transcription of the mCitrine gene...includes 95 plasmids consisting of CRISPR/Cas nucleases, base editors, gRNA backbones, and promoters for...
  4. Advanced Uses of Cre-lox and Flp-FRT - A Neuroscientist’s View

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    Blog Post
    ...further improved, by adding a nuclear localization sequence (SV40 Large T nuclear localization sequence) and...sites. FRT sites and loxP sites differ at the nucleotide level but share an overall structure of 13 base...the fusions allowing Cre/FLP translocate to the nucleus where they exert their recombinase activity (Logie...
  5. Tips for CRISPR Gene Editing in Mice

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    Blog Post
    ...target sequence was digested by sgRNA guided Cas9 endonuclease, homology dependent repair (HR, homologous recombination...however, if the microinjection was done as the pronuclei were fusing, you may have several mosaic mice....off-target effects of CRISPR/Cas-derived RNA-guided endonucleases and nickases." Genome research 24.1 (2014): ...Daisuke, et al. "Generation of mutant mice by pronuclear injection of circular plasmid expressing Cas9...
  6. CRISPR 101: Homology Directed Repair

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    Blog Post
    ...can be caused by intracellular factors such as nucleases and reactive oxygen species, or external forces...: The 5’ DNA end of the break is resected by nucleases to create a ssDNA 3’ overhang. This will serve...ssDNA templates (referred to as ssODNs (oligodeoxynucleotides)) are commonly used for smaller modifications...alleles using long ssDNA donors and CRISPR ribonucleoproteins. Quadros RM, et al. Genome Biol. 18(1); (...
  7. Easi-CRISPR: Generating Knock-In and Conditional Mouse Models

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    Blog Post
    ...CRISPR machinery, Quadros et al. recommend ribonucleoprotein (RNP) complexes of Cas9 protein and the separated...alleles using long ssDNA donors and CRISPR ribonucleoproteins.” Genome Biol. 18 (2017) (1):92. DOI: 10.1186...situ germline genome engineering using CRISPR nucleases. Genome Biol. 19 (2018) (1):25. DOI: 10.1186/s13059...Homology Directed Repair Learn about Cas9 Ribonucleoprotein (RNP) Delivery Resources on Addgene.org ...
  8. CRISPR 101: Epigenetics and Editing the Epigenome

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    Blog Post
    ...came epigenome-engineering tools - zinc finger nucleases and TALENs fused to epigenetic modifiers enabled...Christopher Newgard’s Lab has fused LSD1 to the smaller nuclease-dead Staphylococcus aureus Cas9 (Sa-Cas) and deposited... expression and dCas9-based epigenome editing. Nucleic Acids Research 47:e23–e23. https://doi.org/10.1093...CRISPR-Cas9 system for targeted DNA methylation. Nucleic Acids Research 44:5615–5628 . https://doi.org/10.1093...
  9. 27 Hot Plasmids from 2016

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    Blog Post
    ...incorporate multiple single-strand DNA (ssDNA) oligonucleotides (oligos), and thereby rapidly create desired...transient suppression of DNA repair during oligonucleotide integration, allowing MAGE in otherwise unmodified...2016. PubMed PMID: 26884157 Aronshtam, et al. Nucleic Acids Res. 1996. PubMed PMID: 8692687 Tracking... the IL6ST and BACH2 promoters. Vojta A, et al. Nucl. Acids Res. 2016. PubMed PMID: 26969735 Updated...26912792 FusX-TALEN assembly system TALEs as nucleases (TALENs) are genome-editing tools that are deployed...fusion proteins in a target cell. In addition to nucleotide-based linking strategies, post translational ...
  10. An “elegans” Approach to Better CRISPR/Cas9 Editing Efficiency

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    Blog Post
    ...uses the direct injection of a CRISPR/Cas9 ribonucleoprotein complex with linear DNA as repair templates...non-homologous sequence or a series of single-nucleotide substitutions along a 1.5 kb tract, all without...recombination donors in cultured Drosophila cells. Nucleic Acids Research 42:e89–e89 . https://doi.org/10.1093...elegans by CRISPR-targeted homologous recombination. Nucleic Acids Research 41:e193–e193 . https://doi.org/10.1093...
  11. Typing CRISPR Systems

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    Blog Post
    ... Cas3. Cas3 functions as both a helicase and a nuclease, unwinding and cutting up DNA after recruitment...consider to be an integral component of CRISPR — a nuclease effector. However, IV-C does in fact have a helicase...Classification and evolution of type II CRISPR-Cas systems. Nucleic Acids Research, 42(10), 6091–6105. https://doi.... and involved in competition between plasmids. Nucleic Acids Research, 48(4), 2000–2012. https://doi.org...
  12. What's New in CRISPR - May 2019

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    Blog Post
    ...enhance HDR repair using a single-stranded oligodeoxynucleotide HDR template covalently attached to the ...the Cas9-gRNA RNP complex via the fused HUH endonuclease PCV. This increases HDR efficiency up to 30-fold...meningitidis, Nme2Cas9, that recognizes a simple dinucleotide PAM (N4CC), lending to high target site density...
  13. CRISPR Protocol for Genomic Deletions in Mammalian Cell Lines [Video]

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    Blog Post
    ...experiments of Kim and colleagues using zinc finger nucleases to harness non-homologous end joining repair (...chromosomal deletions in human cells using zinc finger nucleases. Genome Res. 2010 Jan;20(1):81-89. PubMed. 2. ... interspaced palindromic repeats (CRISPR)/Cas9 nuclease system in mammalian cells. J.Biol.Chem. 2014 Aug...
  14. CRISPR Guide

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    Collection
    ...like zinc finger nucleases (ZFNs) or transcription-activator-like effector nucleases (TALENs) required...popular Cas endonuclease, with many modified versions engineered to increase specificity and nuclease activity...increase nuclease fidelity SpCas9-NG - NG; increase in vitro activity SpG - NGN; increase nuclease activity...break; the wild type function of most Cas nucleases dCas9 Nuclease dead Cas9, an enzymatically inactive form...required scientists to design and generate a new nuclease pair for every genomic target. Due to its comparative...RNA ( gRNA or sgRNA ) and a CRISPR-associated endonuclease (Cas enzyme). The gRNA is a short synthetic ...necessary for Cas-binding and a user-defined ∼20-nucleotide spacer that defines the genomic target to be ...
  15. SunTag and Fluorescent Imaging

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    Blog Post
    ...activation. Multiple nuclear localization signals (NLS) increase protein import into the nucleus. In developing...-molecule imaging deep inside the cell, in the nucleus and cytoplasm. Again, they found that SunTag marked...
  16. CRISPR 101: Cas9 Nickase Design and Homology Directed Repair

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    Blog Post
    ...By mutating one of two Cas9 nuclease domains, researchers created the CRISPR nickase. Nickases create...insert an EcoRI site using a single-stranded oligonucleotide (ssODN) donor. Using a D10A nickase to insert...small insertions or tags (ssODN; IDT Ultramer® Oligonucleotides) Use 100 nt homology arms for large insertions...
  17. Viral Vectors 101: Parts of the AAV Packaging Plasmid

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    Blog Post
    ...its endonuclease activity to generates a ssDNA substrate which is then nicked by its endonuclease domain...of Rep78 and Rep68 contains a DNA-binding and endonuclease domains, all four Rep proteins share a common...
  18. History of CRISPR Cas - A tale of survival and evolution

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    Blog Post
    ...genome. Cas genes, which code for polymerases, nucleases, and helicases, were also disrupted to elucidate...CRISPR loci to generate RNA, which guide a Cas nuclease to the specified exogenous genetic material next...mutation in the PAM sequence, preventing the Cas nucleases from re-identifying it (3). Surprisingly, few ...
  19. Another Pathway into Cells: iTOP

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    Blog Post
    ... Cas9 and a gRNA, which subsequently enter the nucleus and cleave the specified target. Figure adapted...expression is by nature transient, which may lower nuclease toxicity or the potential for off-target effects... Biol. 2000 Jul;10(7):290-5. PubMed. Is VP22 nuclear homing an artifact? Lundberg M, Johansson M. Nat...
Showing: 101 - 120 of 419 results