Exon Junction Complex
Exon Junction Complex - Related Videos
02:32
Exon Recombination
0 Views •
2021
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes. Exon shuffling follows “splice frame rules.” Each exon has three reading...
10:30
Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy
0 Views •
Cited by 23 •
2016
Exon skipping is currently a most promising therapeutic option for Duchenne muscular dystrophy (DMD). To expand the applicability for DMD patients and to optimize the stability/function of the resulting truncated dystrophin proteins, a multi-exon skipping approach using cocktail antisense oligonucleotides was developed and we demonstrated systemic dystrophin rescue in a dog model.
10:40
Measuring Neuromuscular Junction Functionality
0 Views •
Cited by 7 •
2017
A functional assessment of the neuromuscular junction (NMJ) can provide essential information on the communication between muscle and nerve. Here we describe a protocol to comprehensively evaluate both the NMJ and muscle functionality using two different muscle-nerve preparations, i.e. soleus-sciatic and diaphragm-phrenic.
11:02
Detecting Somatic Genetic Alterations in Tumor Specimens by Exon Capture and Massively Parallel Sequencing
0 Views •
Cited by 64 •
2013
We describe the preparation of barcoded DNA libraries and subsequent hybridization-based exon capture for detection of key cancer-associated mutations in clinical tumor specimens by massively parallel "next generation" sequencing. Targeted exon sequencing offers the benefits of high throughput, low cost, and deep sequence coverage, thus yielding high sensitivity for detecting low frequency mutations.
01:11
P-N junction
0 Views •
2024
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
FAQs
During splicing, the EJC core components eIF4AIII, MAGOH, Y14, and MLN51 assemble at a defined position upstream of the splice junction. This placement creates a molecular platform that can recruit additional regulatory factors after splicing. Consequently, one RNA mark can connect the completed splicing event with later steps in mRNA handling, rather than acting only during intron removal.
Its defined position, about 20–24 nucleotides upstream of a splice junction, provides a consistent molecular reference on the processed mRNA. That placement helps preserve a physical connection between exon joining and downstream regulation. Because the complex remains associated near the boundary, researchers can relate its location to later effects on mRNA export, translation, localization, and surveillance.
The EJC is a protein-RNA assembly that can participate in several stages of mRNA regulation, whereas nonsense-mediated decay is a surveillance pathway that removes transcripts containing premature stop codons. The complex therefore should not be treated as synonymous with decay. Its broader regulatory reach includes export, translation, and localization, while its relationship with decay represents one specific functional connection.
Studies can examine whether EJC activity affects mRNA export from the nucleus, translation, intracellular localization, or removal through nonsense-mediated decay. Considering these outcomes together is important because the complex coordinates multiple stages of gene expression after transcription. This broader view helps distinguish a general disruption in mRNA handling from an effect limited to one downstream process.
The EJC contributes to the regulatory context in which nonsense-mediated decay operates, linking splicing-related information with surveillance of mRNA. When a transcript contains a premature stop codon, this pathway removes the faulty message. Examining the EJC in this setting helps researchers study how cells use information retained from splicing to influence the fate of potentially abnormal transcripts.
Disruptions in EJC formation or function may interfere with coordinated control of mRNA export, translation, localization, or nonsense-mediated decay. Such disturbances can alter how gene expression proceeds after transcription and may contribute to disease. Research on the complex therefore connects molecular events at exon boundaries with broader consequences for RNA metabolism and cellular regulation.