Related Experiment Video
Updated: Jul 12, 2025
08:19
Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing
Published on: July 7, 2020
10.4K
Microbial Primer: Transposon directed insertion site sequencing (TraDIS): A high throughput method for linking
Isabel A Warner1, Weine J Kok1, Nicole Martinelli1
1Institute for Molecular Bioscience, University of Queensland, St Lucia, Australia.
Microbiology (Reading, England)
|November 1, 2023
Summary
Transposon directed insertion-site sequencing (TraDIS) links genes to traits by analyzing transposon insertions across the genome. This next-generation sequencing method rapidly identifies genes associated with specific phenotypes.
Area of Science:
- Genetics and Genomics
- Molecular Biology
Background:
- Genetic screens are essential for connecting an organism's traits (phenotype) with its genetic makeup (genotype).
- Transposon mutagenesis was an early technique used to map genes responsible for observed phenotypes.
- Next-generation sequencing has revolutionized genetic screening by enabling high-throughput analysis of entire genomes.
Purpose of the Study:
- To describe the transposon directed insertion-site sequencing (TraDIS) method.
- To discuss recent technological advancements in TraDIS.
- To compare TraDIS with other genetic screening approaches.
Main Methods:
- Transposon mutagenesis coupled with next-generation sequencing.
- Detailed description of the TraDIS protocol.
- Comparative analysis of genetic screening methodologies.
Main Results:
- TraDIS allows for rapid and comprehensive interrogation of the genome.
- Identification of genes correlating with specific phenotypes through transposon insertion analysis.
- Evaluation of TraDIS's strengths and weaknesses relative to alternative methods.
Conclusions:
- TraDIS is a powerful tool for phenotype-genotype correlation.
- Technological advances have enhanced the efficiency and scope of TraDIS.
- Understanding TraDIS's advantages and disadvantages aids in selecting appropriate genetic screening strategies.
More Related Videos
Related Concept Videos
02:57DNA-only Transposons
14.5K
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...
The donor site from where the transposon is excised is either degraded or...
14.5K
01:24Transposons
38
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...
38
02:13Overview of Transposition and Recombination
15.6K
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...
15.6K
02:53Conservative Site-specific Recombination and Phase Variation
6.0K
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...
The recognition sites for Cre recombinase called LoxP...
6.0K
01:29Modern Molecular Taxonomy
23
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
23