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Related Concept Videos

DNA-only Transposons02:57

DNA-only Transposons

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DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
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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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Overview of Transposition and Recombination02:13

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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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CRISPR01:59

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Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
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Related Experiment Video

Updated: Jul 1, 2025

Mouse Genome Engineering Using Designer Nucleases
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RNA-guided genome engineering: paradigm shift towards transposons.

Chin-Wei Chang1, Vy Anh Truong1, Nam Ngoc Pham1

  • 1Department of Chemical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan.

Trends in Biotechnology
|March 5, 2024
PubMed
Summary

CRISPR-Cas systems cause DNA double-strand breaks (DSBs), but transposon-based tools like CRISPR-associated transposons (CASTs) and obligate mobile element guided activity (OMEGA) offer DSB-free genome editing. These compact systems enhance precision and efficiency in prokaryotic and eukaryotic cells.

Keywords:
CASTsCRISPROMEGARNA-guided genome engineeringdouble-strand breaktransposon

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Area of Science:

  • Molecular Biology
  • Genomics
  • Biotechnology

Background:

  • CRISPR-Cas systems are powerful genome engineering tools but require double-strand breaks (DSBs) and face delivery challenges due to large protein size.
  • Alternative systems are needed to overcome the limitations of traditional CRISPR-Cas approaches for genome editing.

Purpose of the Study:

  • To review recent developments and applications of CRISPR-associated transposons (CASTs) and obligate mobile element guided activity (OMEGA) proteins in genome engineering.
  • To compare the advantages and disadvantages of these transposon-based systems against other CRISPR systems.

Main Methods:

  • Literature review of recent advancements in CASTs and OMEGA technologies.
  • Comparative analysis of transposon-based genome editing tools versus CRISPR-Cas systems.
  • Exploration of applications in both prokaryotic and eukaryotic cellular systems.

Main Results:

  • CASTs enable RNA-guided, DSB-free integration, offering an alternative to traditional CRISPR-Cas.
  • OMEGA proteins provide hypercompact, RNA-guided genome editing capabilities.
  • Both CASTs and OMEGA show promise for precise and efficient genome editing.

Conclusions:

  • CASTs and OMEGA represent innovative, transposon-based genome engineering tools.
  • These systems offer potential advantages in terms of reduced DNA damage and improved delivery.
  • Further research and application of CASTs and OMEGA can significantly advance genome editing technologies.