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Overview of Transposition and Recombination

Overview of Transposition and Recombination

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...

Transposons

Transposons

Transposons, or "jumping genes," are small mobile genetic elements (MGEs) that range from 700 to 40,000 base pairs in length. They are found in all organisms and can move within the same chromosome or transfer to different chromosomes. In some cases, transposons can also jump between different host DNA molecules, such as plasmids or viruses, contributing to genetic variability.Barbara McClintock first discovered these mobile genetic elements in the 1940s while studying maize genetics, and she...

DNA-only Transposons

DNA-only Transposons

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.
The donor site from where the transposon is excised is either degraded or...

Conservative Site-specific Recombination and Phase Variation

Conservative Site-specific Recombination and Phase Variation

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.
The recognition sites for Cre recombinase called LoxP...

In-vitro Mutagenesis

In-vitro Mutagenesis

To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.

Transgenic Organisms

Transgenic Organisms

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Related Experiment Video

Updated: Dec 31, 2025

Determination of the Optimal Chromosomal Locations for a DNA Element in Escherichia coli Using a Novel Transposon-mediated Approach

Determination of the Optimal Chromosomal Locations for a DNA Element in Escherichia coli Using a Novel Transposon-mediated Approach

Published on: September 11, 2017

Developing Transposable Element Marker System for Molecular Breeding.

R S Bhat¹, K Shirasawa², Y Monden³

¹Department of Biotechnology, University of Agricultural Sciences, Dharwad, Karnataka, India. bhatrs@uasd.in.

Methods in Molecular Biology (Clifton, N.J.)

|January 2, 2020

Summary

This summary is machine-generated.

Transposable element (TE) marker systems leverage abundant genomic DNA sequences for genetic analysis. These markers are valuable tools for crop improvement and genomics research.

Keywords:

Application of transposable element marker system in molecular breeding Suppression PCR Transposable element marker system Transposon display Whole genome in silico search for AhMITE1

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Last Updated: Dec 31, 2025

Determination of the Optimal Chromosomal Locations for a DNA Element in Escherichia coli Using a Novel Transposon-mediated Approach

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Published on: September 11, 2017

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The Production of C. elegans Transgenes via Recombineering with the galK Selectable Marker

The Production of C. elegans Transgenes via Recombineering with the galK Selectable Marker

Published on: January 11, 2011

Area of Science:

Genomics
Molecular Biology
Plant Science

Background:

Transposable elements (TEs) are abundant in animal and plant genomes.
TEs exhibit high insertion polymorphism and are easily detectable.
TE marker systems offer significant advantages for genetic studies.

Purpose of the Study:

To describe methods for developing transposable element (TE) markers.
To review the application of TE markers in molecular breeding.
To highlight the utility of TE markers in genomics.

Main Methods:

Development of transposable element (TE) marker systems.
Application of various methods for TE marker development in crop plants.
Whole genome search for identifying TE insertion sites.

Main Results:

TE marker systems are effective for genomics studies.
TE markers facilitate the identification of genetic variations.
TE markers have practical applications in molecular breeding.

Conclusions:

Transposable element (TE) marker systems are powerful tools in genomics.
TE markers contribute to advancements in crop molecular breeding.
The described methods enable efficient TE marker development.