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Related Concept Videos

Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

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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...
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Translation01:31

Translation

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Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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Transcription01:10

Transcription

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Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
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Alternative RNA Splicing02:18

Alternative RNA Splicing

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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
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General Transcription Factors01:30

General Transcription Factors

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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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Nuclear Export of mRNA02:31

Nuclear Export of mRNA

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Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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Transcription-Export complex in neurodevelopmental disorders.

Rudrarup Bhattacharjee1, Shreya Agarwala2, Danielle Mazurkiewicz2

  • 1Adelaide Medical School and the Robinson Research Institute, The University of Adelaide, Adelaide, South Australia 5005, Australia; Adelaide Centre for Epigenetics, School of Biomedicine, University of Adelaide, Adelaide, South Australia, Australia; South Australian immunoGENomics Cancer Institute, University of Adelaide, Adelaide, South Australia, Australia.

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Summary
This summary is machine-generated.

The Transcription-Export (TREX) complex is vital for cellular function and brain development. Its dysfunction is linked to neurodevelopmental and neurodegenerative diseases, highlighting its therapeutic potential.

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Neuroscience

Background:

  • The nucleus houses genomic information, requiring efficient messenger RNA (mRNA) export for protein synthesis.
  • The Transcription-Export (TREX) complex is crucial for mRNA export and various RNA processing events.
  • TREX complex functions are essential for cellular processes, including brain development and genome stability.

Purpose of the Study:

  • To highlight the critical role of the TREX complex in cellular functions and neurological health.
  • To explore the implications of TREX complex dysfunction in neurodevelopmental and neurodegenerative diseases.

Main Methods:

  • Review of existing literature on the TREX complex and its components.
  • Analysis of genetic variants in TREX components (THOC2, THOC6, DDX39B) and their association with disorders.
  • Examination of evidence linking nucleocytoplasmic RNA transport defects to neurological conditions.

Main Results:

  • The TREX complex mediates essential mRNA export and RNA processing.
  • TREX complex dysfunction is associated with neurodevelopmental disorders through variants in THOC2, THOC6, and DDX39B.
  • Defective RNA transport is increasingly implicated in neurodegenerative diseases.

Conclusions:

  • The TREX complex is fundamental for normal cellular function and brain development.
  • Dysregulation of the TREX complex is a significant factor in neurological diseases.
  • The TREX complex represents a promising target for diagnosing and treating neurological disorders.