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Updated: Dec 22, 2025

Rapid Assembly of Multi-Gene Constructs using Modular Golden Gate Cloning
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Leveraging modern DNA assembly techniques for rapid, markerless genome modification.

Ilya B Tikh1, James C Samuelson1

  • 1Protein Expression and Modification Division, New England BioLabs, Inc., Ipswich, MA, 01938-2723, USA.

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|May 6, 2020
PubMed
Summary

We developed FAST-GE, a rapid and scarless genome editing method for Escherichia coli. This DNA assembly approach streamlines modifications, enabling faster research in synthetic biology and genetic engineering.

Keywords:
DNA assemblyGenome modificationI-SceIsynthetic biology

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Area of Science:

  • Microbiology
  • Synthetic Biology
  • Molecular Biology

Background:

  • Genomic alteration is crucial for understanding prokaryotic biology and enhancing biomolecule production.
  • Existing genome modification methods can be time-consuming and inefficient, particularly in the context of synthetic biology.

Purpose of the Study:

  • To develop a rapid, efficient, and scarless method for modifying the *Escherichia coli* genome.
  • To streamline the process of genome engineering for research and biotechnological applications.

Main Methods:

  • Developed FAST-GE (Fast Assembly-mediated Scarless Targeted Genome Editing), a DNA assembly-based approach.
  • Eliminated traditional cloning steps like plasmid transformation, propagation, and isolation.
  • Utilized I-SceI endonuclease and SacB counter-selection within a single allele-exchange vector (pDEL).

Main Results:

  • Achieved scarless *Escherichia coli* genome modifications (point mutations, deletions, gene replacements) within 48 hours of primer receipt.
  • Demonstrated high efficiency in modifying both *E. coli* B and K-12 strains.
  • Successfully eliminated the need for intermediate cloning steps.

Conclusions:

  • FAST-GE offers a significantly faster and more efficient alternative for *Escherichia coli* genome editing.
  • The method's principles may be applicable to other prokaryotic organisms that can uptake dsDNA and undergo homologous recombination.
  • This advancement accelerates research in prokaryotic genetics and synthetic biology.