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Related Concept Videos

Regulation of Nuclear Protein Sorting01:45

Regulation of Nuclear Protein Sorting

3.5K
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 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 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 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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Nuclear Export of mRNA02:31

Nuclear Export of mRNA

5.6K
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Additional Subnuclear Structures02:10

Additional Subnuclear Structures

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The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals. 
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Detection of Nuclear Blebbing and DNA Leakage in Mammalian Cells by Immunofluorescence
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Border Safety: Quality Control at the Nuclear Envelope.

Brant M Webster1, C Patrick Lusk1

  • 1Yale School of Medicine, New Haven, CT, USA.

Trends in Cell Biology
|October 7, 2015
PubMed
Summary
This summary is machine-generated.

Cells use quality control mechanisms like ESCRT and ERAD to maintain nuclear envelope integrity. These processes protect against protein damage and ensure healthy cell division, potentially mitigating diseases like laminopathies.

Keywords:
ERADESCRTcompartmentalizationinner nuclear membranenuclear envelopenuclear pore complexquality control

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Validation of a Mouse Model to Disrupt LINC Complexes in a Cell-specific Manner
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Area of Science:

  • Cell biology
  • Molecular biology
  • Biochemistry

Background:

  • The nuclear envelope is crucial for protecting the nucleus and maintaining cellular function.
  • Nuclear envelope integrity is vital for preventing disease.

Purpose of the Study:

  • To explore quality control mechanisms that maintain nuclear envelope integrity.
  • To understand how cells manage defective nuclear pore complexes.
  • To link these mechanisms to diseases like laminopathies.

Main Methods:

  • Investigated the roles of endosomal sorting complexes required for transport (ESCRT) machinery.
  • Examined endoplasmic reticulum-associated protein degradation (ERAD) pathways.
  • Studied cellular mechanisms for recognizing and triaging defective nuclear pore complexes.

Main Results:

  • Identified ESCRT and ERAD as key players in nuclear envelope protein quality control.
  • Demonstrated cellular strategies for removing damaged nuclear pore complexes.
  • Highlighted the importance of these mechanisms for preventing disease progression.

Conclusions:

  • Cells employ sophisticated quality control systems to maintain nuclear envelope structure and function.
  • These mechanisms are essential for preventing the accumulation of damaged components.
  • Dysfunction in these pathways may contribute to laminopathies and other nuclear envelope-related diseases.