6,030 results found
    1. Chromosomes and Gene Expression

    Nucleosomes impede Cas9 access to DNA in vivo and in vitro

    Max A Horlbeck et al.
    Nucleosomes provide a direct and profound block to the activity of the CRISPR effector protein Cas9, suggesting future sophisticated design rules for CRISPR targeting.
    1. Cell Biology
    2. Chromosomes and Gene Expression

    Enhanced homology-directed human genome engineering by controlled timing of CRISPR/Cas9 delivery

    Steven Lin et al.
    Building on previous work (Jinek et al., 2013), we report a simple and robust system to achieve high fidelity and high efficiency (30% of homologous recombination) genome engineering by homology-directed repair pathway in human cells using cell cycle synchronization and timed delivery of Cas9 ribonucleoprotein complexes.
    1. Chromosomes and Gene Expression
    2. Human Biology and Medicine

    Covalent linkage of the DNA repair template to the CRISPR-Cas9 nuclease enhances homology-directed repair

    Natasa Savic et al.
    Linking the DNA repair template to the Cas9 ribonucleoprotein complex enhances homology-directed repair of the induced DNA double strand break.
    1. Structural Biology and Molecular Biophysics

    Structural and functional insights into the bona fide catalytic state of Streptococcus pyogenes Cas9 HNH nuclease domain

    Zhicheng Zuo et al.
    The catalytic activation of the Cas9 HNH domain involves a unique conformational change in the ββα-metal motif that is collectively driven by the interactions with the metal ions and DNA.
    1. Chromosomes and Gene Expression
    2. Human Biology and Medicine

    Synthetically modified guide RNA and donor DNA are a versatile platform for CRISPR-Cas9 engineering

    Kunwoo Lee et al.
    The guide RNA and donor DNA of the CRISPR/Cas system tolerate large chemical modifications and can be engineered for enhanced delivery and gene editing.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    Nucleosome breathing and remodeling constrain CRISPR-Cas9 function

    R Stefan Isaac et al.
    The inhibitory influence of nucleosomes on CRISPR-Cas9 is mitigated by nucleosomal DNA breathing and chromatin remodeling.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    The Cas4-Cas1-Cas2 complex mediates precise prespacer processing during CRISPR adaptation

    Hayun Lee et al.
    During CRISPR adaptation, Cas4 forms a ternary complex with the Cas1-Cas2 spacer integration complex, an interaction that coordinates substrate hand-off following precise, PAM-dependent prespacer processing prior to integration.
    1. Microbiology and Infectious Disease

    Functional metagenomics-guided discovery of potent Cas9 inhibitors in the human microbiome

    Kevin J Forsberg et al.
    A high-throughput, activity-based selection identifies many phage-derived inhibitors of Cas9 from human fecal and oral metagenomes, with at least one inhibitor acting via a novel mechanism.
    1. Biochemistry and Chemical Biology

    RNA-dependent RNA targeting by CRISPR-Cas9

    Steven C Strutt et al.
    Divergent Cas9 enzymes direct site-specific single-stranded RNA cleavage, reducing infection by RNA phage in vivo and enabling programmable, PAM-independent repression of gene expression in bacteria.
    1. Cell Biology
    2. Genetics and Genomics

    Circular synthesized CRISPR/Cas gRNAs for functional interrogations in the coding and noncoding genome

    Martin Wegner et al.
    Cloning-free 3Cs technology is developed for the generation of sequence-bias-free covalently closed circular synthesized (3Cs) CRISPR/Cas gRNA libraries that can interrogate the coding and noncoding human genome.

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