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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

Nuclear Protein Sorting

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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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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...
7.8K
Directionality of Nuclear Transport01:42

Directionality of Nuclear Transport

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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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Neural Regulation01:37

Neural Regulation

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Related Experiment Video

Updated: Aug 29, 2025

Assay to Measure Nucleocytoplasmic Transport in Real Time within Motor Neuron-like NSC-34 Cells
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Assay to Measure Nucleocytoplasmic Transport in Real Time within Motor Neuron-like NSC-34 Cells

Published on: May 16, 2017

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Nuclear Pore Dysfunction in Neurodegeneration.

Olivia Spead1,2, Benjamin L Zaepfel1,2, Jeffrey D Rothstein3,4

  • 1Brain Science Institute, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.

Neurotherapeutics : the Journal of the American Society for Experimental Neurotherapeutics
|September 7, 2022
PubMed
Summary
This summary is machine-generated.

Nuclear pore complexes (NPCs) regulate transport between the nucleus and cytoplasm. NPC dysfunction is linked to neurodegenerative diseases like Alzheimer's and ALS, impacting neuronal health.

Keywords:
ALSAlzheimer’s diseaseHuntington’s diseaseNeurodegenerationNuclear pore complexNucleocytoplasmic transport

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Author Spotlight: Understanding the Impact of Pathological Proteins on Axonal Transport in Neurodegenerative Diseases
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Area of Science:

  • Cell Biology
  • Neuroscience
  • Molecular Biology

Background:

  • The nuclear pore complex (NPC) is a vital cellular machine with over 33 protein components.
  • NPCs regulate nucleocytoplasmic transport and have essential cellular functions beyond the nucleus.

Purpose of the Study:

  • To review the critical role of nucleocytoplasmic transport and NPC integrity.
  • To explore the contribution of NPC dysfunction to neurodegenerative diseases.

Main Methods:

  • Literature review of studies on NPC function and neurodegeneration.
  • Analysis of NPC component alterations in neurodegenerative conditions.

Main Results:

  • NPCs are crucial for selective material transport and cellular homeostasis.
  • NPC component mislocalization and altered expression are observed in neurodegeneration.
  • These NPC structural changes negatively affect neuronal function and survival.

Conclusions:

  • Maintaining NPC integrity is essential for neuronal health.
  • NPC dysfunction is a significant factor in the pathogenesis of neurodegenerative disorders.