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Related Concept Videos

Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

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Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
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Nuclear Protein Sorting01:34

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Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
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Nuclear Export01:42

Nuclear Export

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The nucleus restricts several proteins within and allows others to pass. The restricted proteins possess a nuclear retention sequence or NRS, anchoring them to the nuclear lamins and preventing their transport to the cytosol. The non-restricted proteins, after their synthesis, are transported to their site of action, such as the cytosol or other organelles, with the help of nuclear export signals or NES.
NES are of three types- the canonical 10-residue long leucine-rich signal and other...
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Directionality of Nuclear Transport01:42

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Ras-related nuclear protein or Ran is a small G protein that cycles between its GTP and GDP bound states. Ran specific regulators, a Ran GTPase Activating Protein or RanGAP present in the cytosol and a Ran guanine nucleotide exchange factor or RanGEF present inside the nucleus regulate GTP/GDP exchange. A high concentration of GTP inside the cells, in addition to this asymmetric distribution of  Ran-specific regulators, leads to a higher RanGTP concentration inside the nucleus. This...
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Nuclear Localization Signals and Import01:46

Nuclear Localization Signals and Import

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Proteins targeted to the nucleus carry short stretches of amino acid sequences called the nuclear localization signal or NLS. Classical nuclear localization signals are of two types: monopartite and bipartite NLS. Monopartite classical NLS (cNLS) consists of a single cluster of 4-8 amino acids. Bipartite cNLS consists of two clusters of  2-3 amino acids and a 9-12 residue long proline-rich linker bridging the two clusters. Signal clusters are rich in positively charged amino acids such as...
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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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Updated: Jul 2, 2025

Assay to Measure Nucleocytoplasmic Transport in Real Time within Motor Neuron-like NSC-34 Cells
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Nuclear pore dysfunction and disease: a complex opportunity.

Charlotte M Fare1, Jeffrey D Rothstein1

  • 1Department of Neurology and Brain Science Institute, Johns Hopkins University, Baltimore, MD, USA.

Nucleus (Austin, Tex.)
|February 21, 2024
PubMed
Summary
This summary is machine-generated.

Disruptions in nucleocytoplasmic trafficking and nuclear pore function are linked to neurodegenerative diseases. This review explores nuclear pore biology and potential therapies for these conditions.

Keywords:
Neurodegenerative diseasenuclear envelopenuclear pore complexnucleocytoplasmic transportnucleoporintherapeutics

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Area of Science:

  • Cell Biology
  • Neuroscience
  • Molecular Biology

Background:

  • Eukaryotic complexity evolved with genetic material compartmentalization.
  • Disruptions in nucleocytoplasmic trafficking impact cellular function and survival.
  • Nuclear pore injury and transport errors are implicated in neurodegenerative diseases, especially in post-mitotic neurons.

Purpose of the Study:

  • To review current knowledge of nuclear pore biology in health and disease.
  • To discuss the role of nuclear pore injury and nucleocytoplasmic transport in neurodegeneration.
  • To explore potential therapeutic strategies targeting these pathways.

Main Methods:

  • Literature review of physiological and pathological contexts of nuclear pore biology.
  • Analysis of the association between nuclear pore dysfunction and neurodegenerative disease.
  • Synthesis of current therapeutic approaches for nuclear pore-related disorders.

Main Results:

  • Nuclear pore integrity and nucleocytoplasmic transport are crucial for cell survival.
  • Dysfunctional nucleocytoplasmic trafficking is a significant factor in neurodegenerative pathologies.
  • Specific links exist between nuclear pore injury and diseases affecting post-mitotic neurons.

Conclusions:

  • Understanding nuclear pore biology is key to addressing neurodegeneration.
  • Therapeutic interventions targeting nuclear pore injury and transport dysfunction show promise.
  • Further research into nuclear pore mechanisms could reveal novel treatment strategies.