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Title: CasX enzymes comprise a distinct family of RNA-guided genome editors

Journal Article · · Nature (London)
 [1];  [2];  [3];  [4];  [3];  [3];  [4];  [5];  [4];  [4];  [4];  [6];  [7];  [3];  [3];  [3];  [8];  [9]
  1. Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences
  3. Univ. of California, Berkeley, CA (United States). Innovative Genomics Inst.
  4. Univ. of California, Berkeley, CA (United States)
  5. Salk Institute for Biological Studies, La Jolla, CA (United States). Clayton Foundation Laboratories of Peptide Biology
  6. Max-Planck Inst. for Biochemistry, Planegg (Germany)
  7. Ludwig-Maximilians-Univ., Munich (Germany)
  8. Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences, and Howard Hughes Medical Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  9. Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences, Howard Hughes Medical Inst., and Innovative Genomics Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

The RNA-guided CRISPR-associated (Cas) proteins Cas9 and Cas12a provide adaptive immunity against bacteriophage and function as powerful tools for genome editing in wide-ranging cell types. Here we present a third and fundamentally distinct RNA-guided platform, CRISPR-CasX, which uses a unique structure and mechanism for programmable double-stranded DNA cleavage. Biochemical and in vivo data demonstrate that CasX is active for E. coli and human genome modification. Eight cryo-EM structures of CasX in different states of assembly with its guide RNA and double-stranded DNA substrates reveal an extensive RNA scaffold and an unanticipated domain required for DNA unwinding. These data demonstrate how CasX activity arose through convergent evolution to establish an enzyme family that is functionally separate from both Cas9 and Cas12a.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1605229
Journal Information:
Nature (London), Journal Name: Nature (London) Journal Issue: 7743 Vol. 566; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (45)

The Progress of CRISPR/Cas9-Mediated Gene Editing in Generating Mouse/Zebrafish Models of Human Skeletal Diseases journal January 2019
Ex Vivo/In vivo Gene Editing in Hepatocytes Using “All-in-One” CRISPR-Adeno-Associated Virus Vectors with a Self-Linearizing Repair Template journal January 2020
Delivery Aspects of CRISPR/Cas for in Vivo Genome Editing journal May 2019
Recent advances in the CRISPR genome editing tool set journal November 2019
Visualisation of dCas9 target search in vivo using an open-microscopy framework journal August 2019
Increasing the specificity of CRISPR systems with engineered RNA secondary structures journal April 2019
Editor's cut: DNA cleavage by CRISPR RNA-guided nucleases Cas9 and Cas12a journal December 2019
Multiplex genome editing of microorganisms using CRISPR-Cas journal April 2019
CRISPRpic: fast and precise analysis for CRISPR-induced mutations via prefixed index counting journal February 2020
Cardiac tissue engineering: state-of-the-art methods and outlook journal June 2019
Methods for Enhancing Clustered Regularly Interspaced Short Palindromic Repeats/Cas9-Mediated Homology-Directed Repair Efficiency journal June 2019
DETECTing Merkel Cell Polyomavirus in Merkel Tumors journal February 2020
A New Era of Prostate Cancer Precision Medicine journal November 2019
Exploration of Plant-Microbe Interactions for Sustainable Agriculture in CRISPR Era journal August 2019
Emerging Species and Genome Editing Tools: Future Prospects in Cyanobacterial Synthetic Biology journal September 2019
Allele-specific genome targeting in the development of precision medicine journal January 2020
CasLocusAnno: a web‐based server for annotating cas loci and their corresponding (sub)types journal July 2019
CRISPR/Cas9: Nature's gift to prokaryotes and an auspicious tool in genome editing journal November 2019
Evaluation of the CRISPR/Cas9 directed mutant TP53 gene repairing effect in human prostate cancer cell line PC-3 journal November 2019
CRISPR-associated nucleases: the Dawn of a new age of efficient crop improvement journal November 2019
Next Generation Precision Medicine: CRISPR-mediated Genome Editing for the Treatment of Neurodegenerative Disorders journal April 2019
Cas9 Protein Triggers Differential Expression of Inherent Genes Especially NGFR Expression in 293T Cells journal December 2019
The Expanding Class 2 CRISPR Toolbox: Diversity, Applicability, and Targeting Drawbacks journal August 2019
Development of CRISPR-Cas systems for genome editing and beyond journal January 2019
Visualisation of dCas9 target search in vivo using an open-microscopy framework journal August 2019
The emerging and uncultivated potential of CRISPR technology in plant science journal July 2019
Selective organ targeting (SORT) nanoparticles for tissue-specific mRNA delivery and CRISPR–Cas gene editing journal April 2020
Increasing the specificity of CRISPR systems with engineered RNA secondary structures journal April 2019
Leveraging implicit knowledge in neural networks for functional dissection and engineering of proteins journal May 2019
Direct observation of the formation of a CRISPR–Cas12a R-loop complex at the single-molecule level journal January 2020
Editor's cut: DNA cleavage by CRISPR RNA-guided nucleases Cas9 and Cas12a journal December 2019
Making the cut(s): how Cas12a cleaves target and non-target DNA journal October 2019
Multiplex genome editing of microorganisms using CRISPR-Cas journal April 2019
PAM recognition by miniature CRISPR nucleases triggers programmable double-stranded DNA target cleavage preprint February 2020
Evaluating Protein Transfer Learning with TAPE preprint June 2019
RNA-guided DNA insertion with CRISPR-associated transposases journal June 2019
Blood disease–causing and –suppressing transcriptional enhancers: general principles and GATA2 mechanisms journal July 2019
A catalog of CasX genome editing sites in common model organisms journal June 2019
Cardiac tissue engineering: state-of-the-art methods and outlook journal June 2019
Methods for Enhancing Clustered Regularly Interspaced Short Palindromic Repeats/Cas9-Mediated Homology-Directed Repair Efficiency journal June 2019
A New Era of Prostate Cancer Precision Medicine journal November 2019
Epigenetic Control of a Local Chromatin Landscape journal January 2020
Exploration of Plant-Microbe Interactions for Sustainable Agriculture in CRISPR Era journal August 2019
Emerging Species and Genome Editing Tools: Future Prospects in Cyanobacterial Synthetic Biology journal September 2019
Evaluating Protein Transfer Learning with TAPE preprint January 2019

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