Evidence map›Paper›PMID 27798611›Full record

ArticleNature methods2016

Directed evolution using dCas9-targeted somatic hypermutation in mammalian cells.

Gaelen T Hess, Laure Frésard, Kyuho Han, Cameron H Lee, Amy Li, Karlene A Cimprich, Stephen B Montgomery, Michael C Bassik

Open access · greenAbstract read
In one paragraph

Article in Nature methods, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 294 papers.

0numbers the graph read from it
0cells of the map it votes in
294citing papers in PubMed
31.2field-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

294 citing papers in PubMed, 472 citations in OpenAlex.

  1. Review
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  12. 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
  13. Review
  14. Review
  15. Article
  16. Article
  17. CRISPR/Cas Genome Editing and Its Applications in Cereal Crop Improvement.Plant-environment interactions (Hoboken, N.J.) · 2026
    Review
  18. Precision A3G base editors for disease modeling and correction.Molecular therapy : the journal of the American Society of Gene Therapy · 2026
    Article
  19. Article
  20. Review

234 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

8 authors at 1 institution in 1 country.

Gaelen T HessDepartment of Genetics, Stanford University, Stanford, California, USA.
Laure FrésardDepartment of Pathology, Stanford University, Stanford, California, USA.
Kyuho HanDepartment of Genetics, Stanford University, Stanford, California, USA.
Cameron H LeeDepartment of Genetics, Stanford University, Stanford, California, USA.
Amy LiDepartment of Genetics, Stanford University, Stanford, California, USA.
Karlene A CimprichDepartment of Chemical and Systems Biology, Stanford University, Stanford, California, USA.
Stephen B MontgomeryDepartment of Genetics, Stanford University, Stanford, California, USA.
Michael C BassikDepartment of Genetics, Stanford University, Stanford, California, USA.
Stanford University · US

Funding

INSTITUTIONAL TRAINING GRANT IN GENOME SCIENCET32HG000044 · NHGRI · STANFORD UNIVERSITY · PI MICHAEL P. SNYDER · 1995 to 2026
$32.2M
GENETICS TRAINING PROGRAM FOR PHD CANDIDATEST32GM007790 · NIGMS · STANFORD UNIVERSITY · PI BRUNET, ANNE, KINGSLEY, DAVID M · 1985 to 2020
$12.8M
Regulation of the DNA Damage ResponseR01ES016486 · NIEHS · STANFORD UNIVERSITY · PI CIMPRICH, KARLENE A · 2007 to 2025
$6.2M
Accelerating drug development and repurposing using systematic genetic interactioDP2HD084069 · NICHD · STANFORD UNIVERSITY · PI BASSIK, MICHAEL C · 2014 to 2014
$2.4M
Predicting causal non-coding variants in a founder populationR01HG008150 · NHGRI · STANFORD UNIVERSITY · PI MONTGOMERY, STEPHEN · 2015 to 2017
$1.4M
COMPUTATIONAL METHODS FOR PROTEOMIC ANALYSISK22HG000044 · NHGRI · UNIVERSITY OF UTAH · PI GIDDINGS, MORGAN CORINNE · 2000 to 2005
$1.3M
Regulation of the DNA damage ResponseR56ES016486 · NIEHS · STANFORD UNIVERSITY · PI CIMPRICH, KARLENE A · 2024 to 2024
$500k
Four Laser, 18 Color Cell Sorter in the SSFFS10RR025518 · NCRR · STANFORD UNIVERSITY · PI HERZENBERG, LEONARD A · 2009 to 2009
$500k
NCRR NIH HHS S10 RR025518NHGRI NIH HHS K22 HG000044NHGRI NIH HHS R01 HG008150NHGRI NIH HHS T32 HG000044NICHD NIH HHS DP2 HD084069NIEHS NIH HHS R01 ES016486NIEHS NIH HHS R56 ES016486NIGMS NIH HHS T32 GM007790
6 · The paper itself

Abstract

Engineering and study of protein function by directed evolution has been limited by the technical requirement to use global mutagenesis or introduce DNA libraries. Here, we develop CRISPR-X, a strategy to repurpose the somatic hypermutation machinery for protein engineering in situ. Using catalytically inactive dCas9 to recruit variants of cytidine deaminase (AID) with MS2-modified sgRNAs, we can specifically mutagenize endogenous targets with limited off-target damage. This generates diverse libraries of localized point mutations and can target multiple genomic locations simultaneously. We mutagenize GFP and select for spectrum-shifted variants, including EGFP. Additionally, we mutate the target of the cancer therapeutic bortezomib, PSMB5, and identify known and novel mutations that confer bortezomib resistance. Finally, using a hyperactive AID variant, we mutagenize loci both upstream and downstream of transcriptional start sites. These experiments illustrate a powerful approach to create complex libraries of genetic variants in native context, which is broadly applicable to investigate and improve protein function.

Indexed as

Point MutationBortezomibClustered Regularly Interspaced Short Palindromic RepeatsCRISPR-Associated ProteinsCytidine DeaminaseDirected Molecular EvolutionDrug ResistanceGreen Fluorescent ProteinsHumansK562 CellsLevivirusProteasome Endopeptidase ComplexProtein EngineeringRNA, Guide, CRISPR-Cas SystemsBortezomibCRISPR-Associated ProteinsCytidine Deaminaseenhanced green fluorescent proteinGreen Fluorescent ProteinsProteasome Endopeptidase ComplexPSMB5 protein, humanRNA, Guide, CRISPR-Cas Systems

Identifiers

PMID27798611
PMCPMC5557288
OpenAlexW2542621333

What OpenQuestion holds

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LicenceTDM
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.