Evidence map›Paper›PMID 33353963›Full record

ArticleNature communications2020

In vivo diversification of target genomic sites using processive base deaminase fusions blocked by dCas9.

Beatriz Álvarez, Mario Mencía, Víctor de Lorenzo, Luis Ángel Fernández

Abstract read
In one paragraph

Article in Nature communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 48 papers.

0numbers the graph read from it
0cells of the map it votes in
48citing 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

48 citing papers in PubMed.

  1. Review
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  8. Targeted Transition Mutations in Phage-Assisted Evolution.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  9. Review
  10. Article
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  13. In vivo directed evolution of an ultrafast Rubisco from a semianaerobic environment imparts oxygen resistance.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  14. Review
  15. Article
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  19. Targeted mutagenesis of specific genomic DNA sequences in animals for thebioRxiv : the preprint server for biology · 2024
    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

4 authors.

Beatriz ÁlvarezDepartment of Microbial Biotechnology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, Campus UAM Cantoblanco, 28049, Madrid, Spain.
Mario MencíaCentro de Biología Molecular "Severo Ochoa" (Consejo Superior de Investigaciones Científicas - Universidad Autónoma de Madrid), Nicolas Cabrera 1, Campus UAM Cantoblanco, 28049, Madrid, Spain.
Víctor de LorenzoSystems Biology Program, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, Campus UAM Cantoblanco, 28049, Madrid, Spain.ORCID 0000-0002-6041-2731
Luis Ángel FernándezDepartment of Microbial Biotechnology, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas (CNB-CSIC), Darwin 3, Campus UAM Cantoblanco, 28049, Madrid, Spain. lafdez@cnb.csic.es.ORCID 0000-0001-5920-0638

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In vivo mutagenesis systems accelerate directed protein evolution but often show restricted capabilities and deleterious off-site mutations on cells. To overcome these limitations, here we report an in vivo platform to diversify specific DNA segments based on protein fusions between various base deaminases (BD) and the T7 RNA polymerase (T7RNAP) that recognizes a cognate promoter oriented towards the target sequence. Transcriptional elongation of these fusions generates transitions C to T or A to G on both DNA strands and in long DNA segments. To delimit the boundaries of the diversified DNA, the catalytically dead Cas9 (dCas9) is tethered with custom-designed crRNAs as a "roadblock" for BD-T7RNAP elongation. Using this T7-targeted dCas9-limited in vivo mutagenesis (T7-DIVA) system, rapid molecular evolution of the antibiotic resistance gene TEM-1 is achieved. While the efficiency is demonstrated in E. coli, the system can be adapted to a variety of bacterial and eukaryotic hosts.

Indexed as

Genome, BacterialAminohydrolasesbeta-LactamasesCRISPR-Associated Protein 9Directed Molecular EvolutionDNA-Directed RNA PolymerasesEscherichia coliMicrobial Sensitivity TestsMutagenesisMutationRecombinant Fusion ProteinsRNA, Guide, CRISPR-Cas SystemsViral ProteinsAminohydrolasesbacteriophage T7 RNA polymerasebeta-Lactamasesbeta-lactamase TEM-1CRISPR-Associated Protein 9DNA-Directed RNA PolymerasesRecombinant Fusion ProteinsRNA, Guide, CRISPR-Cas SystemsViral Proteins

Identifiers

PMID33353963
PMCPMC7755918

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.