Transposition Reaction
Transposition Reaction - Related Videos
02:13
Overview of Transposition and Recombination
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2020
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...
07:23
Surgery and Behavioral Testing in the Tibial Neuroma Transposition Model in Rats
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Cited by 2 •
2023
This protocol describes the tibial neuroma transposition model, which entails a lesion of the tibial nerve with subsequent transposition of the proximal nerve end toward a subcutaneous pretibial or lateral position. Behavioral testing of neuroma pain and plantar hyperalgesia is quantified using Von Frey monofilaments.
04:42
Generating a Rat Model of Tibial Neuroma Transposition
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2025
Source: Brakkee, E. M., et al. Surgery and Behavioral Testing in the Tibial Neuroma Transposition Model in Rats. J. Vis. Exp. (2023).This video demonstrates a procedure to generate a rat tibial neuroma transposition (TNT) model. After exposing the tibial nerve in the hind leg of an anesthetized rat, transect the nerve. Next, create a subcutaneous tunnel, thread the severed nerve through the tunnel, and suture it in place. In the absence of a target for reinnervation, disorganized axonal...
05:11
Glioblastoma Induction Using SB Mediated Transposition: A Technique for Generating Novel Mouse Model Using Transposon Mediated Integration of SB Plasmid into Neonatal Mouse Brain
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2025
This video describes an efficient technique to induce glioblastomas (GBM) using transposon DNA injected into the ventricles of neonatal mice. Cells of the subventricular zone, which take up the plasmid, transform, proliferate, and generate tumors with histopathological characteristics of human GBM.
03:06
Reaction Mechanisms
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2020
Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs. For instance, the decomposition of ozone appears to follow a mechanism with two steps:
FAQs
Terminal sequences act as recognition sites that identify the mobile DNA element to the transposase enzyme. After binding these ends, transposase coordinates the element’s removal in a cut-and-paste reaction and supports its integration into a different genomic target site. This recognition step gives the reaction molecular specificity and determines which DNA segment is mobilized.
Cut-and-paste transposition removes the mobile element from its original genomic position before insertion elsewhere, so the original location is no longer occupied by that element. Replicative transposition instead produces a copy at the new site while retaining the original. These distinct pathways can therefore lead to different changes in copy number and genome organization.
A newly inserted element can interrupt a gene, producing an insertional mutation, or influence how a nearby gene is expressed. The resulting effect depends on where the element integrates within the genome. Because transposition can change both coding regions and regulatory surroundings, it provides a mechanism for modifying phenotype and studying the consequences of altered gene activity.
Movement of mobile DNA can rearrange genome organization and introduce new insertions at different locations. If those changes affect gene function or expression, they may create genetic variation on which genome evolution can act. Transposition therefore connects local DNA movement with broader changes in genome structure and the distribution of functional sequences.
Engineered transposons adapt the mobility of these DNA elements for controlled experimental purposes. Researchers can use them for gene discovery, functional screening, genome mapping, and stable introduction of DNA into cells. Their value comes from linking movement or insertion with an observable genetic outcome, allowing investigators to identify affected genes or track genomic locations.
A transposition-based experiment can reveal which genes are disrupted by insertions, how those insertions affect gene expression, and where introduced DNA has integrated. Such results support functional screens and genome mapping, while stable DNA introduction enables persistent genetic analysis in cells. Interpretation centers on the insertion site and its relationship to observed genetic effects.