Evidence map›Paper›PMID 38688943›Full record

ArticleNature communications2024

Unraveling the mechanisms of PAMless DNA interrogation by SpRY-Cas9.

Grace N Hibshman, Jack P K Bravo, Matthew M Hooper, Tyler L Dangerfield, Hongshan Zhang, Ilya J Finkelstein, Kenneth A Johnson, David W Taylor

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
11.7field-weighted citation impact, top 1% of its field
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

43 citing papers in PubMed, 50 citations in OpenAlex.

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  12. How Genomic and Structural Context Could Shape JAK-STAT Variant Pathogenicity.Twin research and human genetics : the official journal of the International Society for Twin Studies · 2026
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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

8 authors at 3 institutions in 2 countries.

Grace N HibshmanDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.ORCID http://orcid.org/0000-0002-3470-4861
Jack P K BravoDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA. jack.bravo@ist.ac.at.
Matthew M HooperDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.ORCID http://orcid.org/0000-0002-4889-3288
Tyler L DangerfieldDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.
Hongshan ZhangDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.
Ilya J FinkelsteinDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.ORCID http://orcid.org/0000-0002-9371-2431
Kenneth A JohnsonDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA.
David W TaylorDepartment of Molecular Biosciences, University of Texas at Austin, Austin, TX, 78712, USA. dtaylor@utexas.edu.ORCID http://orcid.org/0000-0002-6198-1194
The University of Texas at Austin · USInstitute of Science and Technology Austria · ATLivestrong Foundation · US

Funding

Kinetic and structural basis for SARS-CoV-2 RNA-dependent RNA polymerase specificity and inhibitionR01AI163336 · NIAID · UNIVERSITY OF TEXAS AT AUSTIN · PI JOHNSON, KENNETH ALLEN · 2021 to 2025
$2.9M
Imaging macromolecular machines in gene regulationR35GM138348 · NIGMS · UNIVERSITY OF TEXAS AT AUSTIN · PI TAYLOR, DAVID W · 2020 to 2024
$1.9M
Dynamics of Hepatis C viral RNA-dependent RNA replicationR01AI110577 · NIAID · UNIVERSITY OF TEXAS AT AUSTIN · PI JOHNSON, KENNETH ALLEN · 2015 to 2018
$1.8M
Mechanism, specificity, and design of CRISPR RNA-mediated gene regulationR01GM124141 · NIGMS · UNIVERSITY OF TEXAS AT AUSTIN · PI FINKELSTEIN, ILYA J · 2017 to 2020
$1.2M
NIAID NIH HHS R01 AI110577NIAID NIH HHS R01 AI163336NIGMS NIH HHS R01 GM124141NIGMS NIH HHS R35 GM138348
6 · The paper itself

Abstract

CRISPR-Cas9 is a powerful tool for genome editing, but the strict requirement for an NGG protospacer-adjacent motif (PAM) sequence immediately next to the DNA target limits the number of editable genes. Recently developed Cas9 variants have been engineered with relaxed PAM requirements, including SpG-Cas9 (SpG) and the nearly PAM-less SpRY-Cas9 (SpRY). However, the molecular mechanisms of how SpRY recognizes all potential PAM sequences remains unclear. Here, we combine structural and biochemical approaches to determine how SpRY interrogates DNA and recognizes target sites. Divergent PAM sequences can be accommodated through conformational flexibility within the PAM-interacting region, which facilitates tight binding to off-target DNA sequences. Nuclease activation occurs ~1000-fold slower than for Streptococcus pyogenes Cas9, enabling us to directly visualize multiple on-pathway intermediate states. Experiments with SpG position it as an intermediate enzyme between Cas9 and SpRY. Our findings shed light on the molecular mechanisms of PAMless genome editing.

Indexed as

CRISPR-Associated Protein 9CRISPR-Cas SystemsDNAGene EditingStreptococcus pyogenesBacterial ProteinsRNA, Guide, CRISPR-Cas SystemsBacterial ProteinsCRISPR-Associated Protein 9DNARNA, Guide, CRISPR-Cas Systems

Identifiers

PMID38688943
PMCPMC11061278
OpenAlexW4396558368

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.