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Related Concept Videos

Transformation01:26

Transformation

15
Microbial communities are dynamic environments where cell lysis releases free DNA into the surroundings. Other cells can take up this extracellular DNA through a process known as transformation.When a cell incorporates this foreign DNA into its genome, resulting in genetic modification, the process is known as transformation. Cells capable of this process are termed competent. Competence can be natural, as observed in certain bacteria and archaea, or artificially induced in the...
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
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Altering under-represented DNA sequences elevates bacterial transformation efficiency.

Shuai Hu1, Stefani Giacopazzi1, Ryan Modlin1,2

  • 1Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, California, USA.

Mbio
|October 31, 2023
PubMed
Summary
This summary is machine-generated.

Genetic engineering in bacteria is improved by removing specific DNA sequences. This "stealth DNA" modification enhances the integration of new genetic material into bacterial genomes, simplifying bacterial genome manipulation.

Keywords:
genomesrestriction enzymetransformation

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Genetics

Background:

  • Bacterial genome manipulation is essential for various scientific fields.
  • Genetic engineering introduces new DNA into bacterial genomes.
  • Bacteria possess defense systems, including restriction enzymes, that degrade foreign DNA based on specific recognition sequences.

Purpose of the Study:

  • To identify specific DNA sequences that are unusually absent in bacterial genomes.
  • To determine if removing these sequences from introduced DNA can improve its integration frequency.
  • To develop a strategy for enhanced bacterial transformation.

Main Methods:

  • Bioinformatic analysis to identify underrepresented DNA sequences in bacterial genomes.
  • Comparative analysis of DNA integration efficiency with and without the identified sequences.
  • Experimental validation of the
  • stealth DNA
  • approach in bacterial transformation.

Main Results:

  • A set of DNA sequences, normally absent in bacterial genomes, was identified.
  • Removing these identified sequences from foreign DNA significantly increased its incorporation rate into the bacterial genome.
  • The strategy demonstrated a higher transformation efficiency compared to standard methods.

Conclusions:

  • Eliminating specific, naturally absent DNA sequences allows foreign DNA to evade bacterial defense mechanisms.
  • This
  • stealth DNA
  • approach offers a straightforward and broadly applicable method to enhance bacterial genetic engineering.
  • The findings facilitate more efficient manipulation of bacterial genomes.