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Related Concept Videos

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.
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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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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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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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A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton
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Nucleoskeleton proteins for nuclear dynamics.

Kei Miyamoto1, Masahiko Harata2

  • 1Graduate School of Biology-Oriented Science and Technology, Kindai University, 930 Nishimitani, Kinokawa-shi, Wakayama 649-6493, Japan.

Journal of Biochemistry
|January 22, 2021
PubMed
Summary
This summary is machine-generated.

The cell nucleus contains a nucleoskeleton, a network of protein filaments like lamins and actin. This structure is crucial for organizing the nucleus and regulating gene transcription and DNA repair.

Keywords:
laminnuclear actinnuclear dynamicsnucleoskeleton

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • The eukaryotic nucleus is densely packed with chromosomes and proteins.
  • A cytoskeleton-like network of protein filaments was not previously thought to exist within the nucleus.
  • Emerging evidence points to structural filamentous components, termed nucleoskeleton proteins, supporting nuclear organization.

Purpose of the Study:

  • To discuss the role of the nucleoskeleton in orchestrating nuclear dynamics.
  • To highlight the importance of nucleoskeleton proteins in cellular processes.

Main Methods:

  • This commentary synthesizes existing evidence and research findings.
  • It focuses on the functional roles of nucleoskeleton proteins.

Main Results:

  • Nucleoskeleton proteins, including lamins and actin, form a filamentous network within the nucleus.
  • These proteins influence transcriptional regulation, chromatin organization, and DNA damage responses.
  • Nucleoskeleton proteins are vital for cellular differentiation and animal development.

Conclusions:

  • The nucleoskeleton plays a critical role in maintaining nuclear structure and function.
  • Nucleoskeleton-based regulatory mechanisms are essential for orchestrating nuclear dynamics.
  • Further research into the nucleoskeleton will illuminate fundamental cellular processes.