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Related Experiment Video

Updated: Feb 4, 2026

Improved Genome Editing via Oviductal Nucleic Acids Delivery-based In Vivo Electroporation Technique for Knockout Mice Generation
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Retroelement-Based Genome Editing and Evolution.

Anna J Simon, Barrett R Morrow, Andrew D Ellington

    ACS Synthetic Biology
    |September 27, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed bacterial retrons for dynamic gene editing and mutagenesis. This novel system enhances mutation rates for continuous evolution of targeted DNA sequences in vivo.

    Keywords:
    continuous evolutiongenome editingpolymeraseretronsynthetic biology

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    Area of Science:

    • Molecular Biology
    • Genetics
    • Synthetic Biology

    Background:

    • Existing genome editing tools have limitations for continuous sequence evolution.
    • Bacterial retroelements (retrons) offer potential for targeted gene manipulation.

    Purpose of the Study:

    • To engineer retrons for dynamic, in vivo gene editing and mutagenesis.
    • To enhance the efficiency and versatility of retron-based editing systems.

    Main Methods:

    • Optimized retron expression and host machinery interactions to increase mutation incorporation.
    • Engineered a coupled mutagenic T7 RNA polymerase-retron system for novel mutations.
    • Applied the system to evolve antibiotic resistance genes.

    Main Results:

    • Achieved a 78-fold increase in preprogrammed mutation incorporation frequency.
    • Demonstrated simultaneous editing of 13 positions over a 31-base length.
    • Enabled targeted deletions and insertions for the first time with retrons.
    • Generated mutation rates 190-fold higher than background in targeted regions.

    Conclusions:

    • Optimized retrons provide a powerful tool for dynamic, in vivo gene editing.
    • The T7 RNA polymerase-retron system facilitates continuous evolution of targeted genes.
    • This technology enables the development of novel gene variants and phenotypes.