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Related Concept Videos

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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The Nucleus01:32

The Nucleus

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The nucleus is a membrane-bound organelle that acts as a control center in a eukaryotic cell. It contains chromosomal DNA, which controls gene expression and precisely regulates the production of proteins within the cell. In contrast, the DNA inside the mitochondria and chloroplast only carries out functions that are specific to those organelles.
Arrangement of DNA within Nucleus
The regulation of gene expression inside the nucleus is dependent on many factors, including the DNA structure. The...
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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. 
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
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The Nucleolus02:55

The Nucleolus

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The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
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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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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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Related Experiment Video

Updated: Aug 23, 2025

Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion
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Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion

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Nuclear movement in multinucleated cells.

Jorel R Padilla1, Lillie M Ferreira1, Eric S Folker1

  • 1Biology Department, Boston College, Chestnut Hill, MA 02467, USA.

Development (Cambridge, England)
|October 28, 2022
PubMed
Summary
This summary is machine-generated.

Nuclear positioning is vital for cell and organism development. This review explores how multiple nuclei move and align in various systems, offering insights into conserved mechanisms.

Keywords:
CytoskeletonLINC complexNuclear movementSyncytia

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Nuclear Migration in the Drosophila Oocyte
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A Direct Force Probe for Measuring Mechanical Integration Between the Nucleus and the Cytoskeleton
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Related Experiment Videos

Last Updated: Aug 23, 2025

Exploiting Live Imaging to Track Nuclei During Myoblast Differentiation and Fusion
09:03

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Nuclear Migration in the Drosophila Oocyte
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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Genetics

Background:

  • Nuclear movement is essential for cellular function and organism development.
  • Multinucleated cells and syncytia play critical roles in homeostasis and development.
  • Understanding nuclear positioning is key to deciphering complex biological processes.

Approach:

  • This review synthesizes current knowledge on nuclear movement regulation.
  • It examines well-understood developmental contexts like pronuclear migration and syncytial development.
  • Principles from model systems are applied to broader biological contexts.

Key Points:

  • Conserved mechanisms govern nuclear positioning across diverse species.
  • Specific examples include Drosophila, C. elegans, skeletal muscle, and fungi.
  • Regulation of multiple nuclear movements is critical for proper development.

Conclusions:

  • The study of nuclear positioning provides fundamental insights into developmental biology.
  • Conserved principles of nuclear migration can be extrapolated to various biological systems.
  • Further research into nuclear dynamics will illuminate developmental processes and cellular functions.