Evidence map›Paper›PMID 32042170›Full record

ArticleNature biotechnology2020

Continuous evolution of SpCas9 variants compatible with non-G PAMs.

Shannon M Miller, Tina Wang, Peyton B Randolph, Mandana Arbab, Max W Shen, Tony P Huang, Zaneta Matuszek, Gregory A Newby, Holly A Rees, David R Liu

Abstract read
In one paragraph

Article in Nature biotechnology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 219 papers.

0numbers the graph read from it
0cells of the map it votes in
219citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

219 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Targeted mutagenesis and base editing using engineeredPlant biotechnology (Tokyo, Japan) · 2026
    Article
  6. Anti-CRISPR-mediated continuous directed evolution of CRISPR-Cas9 in human cells.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  7. Towards precision medicine for brain arteriovenous malformations.The Journal of clinical investigation · 2026
    Review
  8. Review
  9. Article
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article

159 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Shannon M Miller *Merkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
Tina Wang *Merkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
Peyton B RandolphMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.ORCID http://orcid.org/0000-0001-6385-364X
Mandana ArbabMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
Max W ShenMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
Tony P HuangMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
Zaneta MatuszekMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
Gregory A NewbyMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.ORCID http://orcid.org/0000-0001-7869-2615
Holly A ReesMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA.
David R LiuMerkin Institute of Transformative Technologies in Healthcare, Broad Institute of Harvard and MIT, Cambridge, MA, USA. drliu@fas.harvard.edu.ORCID http://orcid.org/0000-0002-9943-7557

Funding

Center for Genomic Editing and Recording: Development and Application of Next-Generation Genome and Epigenome Editing Methods to Advance the Study and Treatment of Human DiseaseRM1HG009490 · NHGRI · WHITEHEAD INSTITUTE FOR BIOMEDICAL RES · PI Brittany S. Adamson, Martin Joseph Ankrah Aryee · 2017 to 2026
$22.7M
Integrating Chemistry and Evolution to Illuminate Biology and Enable Novel TherapeuticsR35GM118062 · NIGMS · HARVARD UNIVERSITY · PI LIU, DAVID R · 2016 to 2025
$6.4M
ePACE: automation platforms for adaptable and scalable continuous evolution of biomolecules with therapeutic potentialR01EB027793 · NIBIB · BROAD INSTITUTE, INC. · PI Ahmad Samir Khalil, DAVID R LIU · 2019 to 2026
$6.1M
Graduate Training in Computational and Systems BiologyT32GM087237 · NIGMS · MASSACHUSETTS INSTITUTE OF TECHNOLOGY · PI BURGE, CHRISTOPHER B · 2009 to 2023
$4.6M
Expanding the Scope of Base EditingU01AI142756 · NIAID · BROAD INSTITUTE, INC. · PI LIU, DAVID R · 2018 to 2022
$2.1M
Continuous Evolution of Proteins with Novel Therapeutic PotentialR01EB022376 · NIBIB · HARVARD UNIVERSITY · PI LIU, DAVID R · 2016 to 2019
$1.8M
Engineering Protein Stability Through Phage-Assisted Continuous EvolutionF32GM119228 · NIGMS · HARVARD UNIVERSITY · PI WANG, TINA · 2016 to 2018
$174k
Howard Hughes Medical InstituteNHGRI NIH HHS RM1 HG009490NIAID NIH HHS U01 AI142756NIBIB NIH HHS R01 EB022376NIBIB NIH HHS R01 EB027793NIGMS NIH HHS F32 GM119228NIGMS NIH HHS R35 GM118062NIGMS NIH HHS T32 GM087237
6 · The paper itself

Abstract

The targeting scope of Streptococcus pyogenes Cas9 (SpCas9) and its engineered variants is largely restricted to protospacer-adjacent motif (PAM) sequences containing G bases. Here we report the evolution of three new SpCas9 variants that collectively recognize NRNH PAMs (where R is A or G and H is A, C or T) using phage-assisted non-continuous evolution, three new phage-assisted continuous evolution strategies for DNA binding and a secondary selection for DNA cleavage. The targeting capabilities of these evolved variants and SpCas9-NG were characterized in HEK293T cells using a library of 11,776 genomically integrated protospacer-sgRNA pairs containing all possible NNNN PAMs. The evolved variants mediated indel formation and base editing in human cells and enabled A•T-to-G•C base editing of a sickle cell anemia mutation using a previously inaccessible CACC PAM. These new evolved SpCas9 variants, together with previously reported variants, in principle enable targeting of most NR PAM sequences and substantially reduce the fraction of genomic sites that are inaccessible by Cas9-based methods.

Indexed as

CRISPR-Associated Protein 9CRISPR-Cas SystemsDirected Molecular EvolutionDNADNA CleavageGene EditingGenetic VariationGenome, HumanHEK293 CellsHumansMutationNucleotide MotifsStreptococcus pyogenesSubstrate SpecificityCRISPR-Associated Protein 9DNA

Identifiers

PMID32042170
PMCPMC7145744

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.