Evidence map›Paper›PMID 33692102›Full record

ArticleScience advances2021

Inhibition of CRISPR-Cas12a DNA targeting by nucleosomes and chromatin.

Isabel Strohkendl, Fatema A Saifuddin, Bryan A Gibson, Michael K Rosen, Rick Russell, Ilya J Finkelstein

Open access · goldAbstract read
In one paragraph

Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
4.3field-weighted citation impact, top 4% 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

27 citing papers in PubMed, 59 citations in OpenAlex.

  1. Gigabase-scale deletion scanning of the human genome.bioRxiv : the preprint server for biology · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Histone demethylases in autophagy and inflammation.Cell communication and signaling : CCS · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Decorating chromatin for enhanced genome editing using CRISPR-Cas9.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
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

6 authors at 3 institutions in 1 country.

Isabel StrohkendlDepartment of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA. istrohkendl@utexas.edu rick_russell@cm.utexas.edu ilya@finkelsteinlab.org.ORCID 0000-0002-6290-8685
Fatema A SaifuddinDepartment of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA.ORCID 0000-0003-4957-3849
Bryan A GibsonDepartment of Biophysics and Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.ORCID 0000-0002-9657-7466
Michael K RosenDepartment of Biophysics and Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.ORCID 0000-0002-0775-7917
Rick RussellDepartment of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA. istrohkendl@utexas.edu rick_russell@cm.utexas.edu ilya@finkelsteinlab.org.ORCID 0000-0002-4879-8563
Ilya J FinkelsteinDepartment of Molecular Biosciences and Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA. istrohkendl@utexas.edu rick_russell@cm.utexas.edu ilya@finkelsteinlab.org.ORCID 0000-0002-9371-2431
The University of Texas at Austin · USHoward Hughes Medical Institute · USUniversity of California, San Francisco · US

Funding

Time-resolved small angle X-ray scatteringP01GM066275 · NIGMS · STANFORD UNIVERSITY · PI HERSCHLAG, DANIEL · 2003 to 2017
$17.8M
Mechanisms and Specificity of Proteins that Manipulate DNA and RNA StructureR35GM131777 · NIGMS · UNIVERSITY OF TEXAS AT AUSTIN · PI Rick Russell · 2019 to 2026
$3.2M
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
NIGMS NIH HHS P01 GM066275NIGMS NIH HHS R01 GM124141NIGMS NIH HHS R35 GM131777
6 · The paper itself

Abstract

Genome engineering nucleases must access chromatinized DNA. Here, we investigate how AsCas12a cleaves DNA within human nucleosomes and phase-condensed nucleosome arrays. Using quantitative kinetics approaches, we show that dynamic nucleosome unwrapping regulates target accessibility to Cas12a and determines the extent to which both steps of binding-PAM recognition and R-loop formation-are inhibited by the nucleosome. Relaxing DNA wrapping within the nucleosome by reducing DNA bendability, adding histone modifications, or introducing target-proximal dCas9 enhances DNA cleavage rates over 10-fold. Unexpectedly, Cas12a readily cleaves internucleosomal linker DNA within chromatin-like, phase-separated nucleosome arrays. DNA targeting is reduced only ~5-fold due to neighboring nucleosomes and chromatin compaction. This work explains the observation that on-target cleavage within nucleosomes occurs less often than off-target cleavage within nucleosome-depleted genomic regions in cells. We conclude that nucleosome unwrapping regulates accessibility to CRISPR-Cas nucleases and propose that increasing nucleosome breathing dynamics will improve DNA targeting in eukaryotic cells.

Indexed as

ChromatinNucleosomesCRISPR-Cas SystemsDNAEndonucleasesHumansChromatinDNAEndonucleasesNucleosomes

Identifiers

PMID33692102
PMCPMC7946368
OpenAlexW3134237166

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.