Exon Intron Structure
Exon Intron Structure - Related Videos
06:10
A Fluorescence-based Exonuclease Assay to Characterize DmWRNexo, Orthologue of Human Progeroid WRN Exonuclease, and Its Application to Other Nucleases
0 Views •
Cited by 4 •
2013
Exonucleases play critical roles in ensuring genome stability. Loss of WRN exonuclease function results in premature aging. Studying substrates and other requirements of the nuclease in vitro can help elucidate its role in vivo. Here we demonstrate a rapid and reproducible fluorescence-based assay to measure its nuclease activity.
02:41
Chromatin Structure Regulates pre-mRNA Processing
0 Views •
2020
In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell. The chromatin structure, especially...
06:48
A Reporter Assay to Analyze Intronic microRNA Maturation in Mammalian Cells
0 Views •
Cited by 1 •
2022
We developed an intronic microRNA biogenesis reporter assay to be used in cells in vitro with four plasmids: one with intronic miRNA, one with the target, one to overexpress a regulatory protein, and one for Renilla luciferase. The miRNA was processed and could control luciferase expression by binding to the target sequence.
12:03
Dynamics of Structures
0 Views •
2023
Source: Roberto Leon, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA It is rare nowadays that a whole year goes by without a major earthquake event wreaking havoc somewhere around the world. In some cases, like the 2005 Banda Ache earthquake in Indonesia, the damage involved large geographic areas and casualties in the six figures. In general, the number and intensity of earthquakes is not increasing, however, the vulnerability of the built environment is...
09:54
Structure Of Ferrocene
0 Views •
2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University In 1951, Kealy and Pauson reported to Nature the synthesis of a new organometallic compound, ferrocene.1 In their original report, Pauson suggested a structure for ferrocene in which the iron is singly bonded (sigma bonds) to one carbon atom of each cyclopentadiene ligand (Figure 1, Structure I).1,2,3 This initial report led to wide-spread interest in the structure of ferrocene, and many leading scientists participated...
FAQs
The spliceosome recognizes conserved sequences located at intron boundaries in the newly transcribed pre-mRNA. These signals guide the molecular cutting and joining steps, allowing neighboring exons to be connected in the correct order. Accurate boundary recognition is essential because an error can alter the resulting messenger RNA and may change the protein produced from the gene.
Alternative splicing allows cells to select different combinations of exons when processing the same pre-mRNA. Each selected combination can generate a distinct messenger RNA, which may then produce a different protein variant. This mechanism gives exon-intron structure an important role in regulated gene expression and helps explain how one gene can support multiple biological outputs.
Mutations near intron boundaries can interfere with the conserved signals required for spliceosome recognition and RNA processing. As a result, exon joining may be disrupted, producing an altered messenger RNA rather than the expected transcript. Researchers therefore examine these regions when interpreting genetic variants and investigating whether abnormal splicing could contribute to disease.
Genome annotation uses exon-intron organization to help identify and describe gene structures within genomic sequences. By determining which regions contribute to mature RNA and how they are separated by introns, researchers can build models of gene organization and compare possible transcript arrangements. This information supports interpretation of gene function and subsequent studies of RNA processing.
Examining exon-intron structure reveals how transcription is followed by RNA processing and how regulated exon selection can influence gene output. Researchers can compare transcript arrangements to determine whether a gene may produce multiple messenger RNA or protein variants. This provides a framework for connecting gene organization with changes in expression during molecular or developmental studies.
Researchers can map exon and intron arrangements, examine conserved boundary regions, and compare the RNA products generated after processing. These analyses help test whether alternative exon selection accompanies regulated expression or developmental changes. The same approach can also support experiments that evaluate how sequence alterations affect splicing, transcript structure, and the protein variants expected from a gene.