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Related Concept Videos

Eukaryotic Compartmentalization01:37

Eukaryotic Compartmentalization

One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
For example, lysosomes in the animal cells...
Eukaryotic Compartmentalization01:46

Eukaryotic Compartmentalization

One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
For example, lysosomes in the animal cells...
Eukaryotic Compartmentalizations01:46

Eukaryotic Compartmentalizations

One of the distinguishing features of eukaryotic cells is that they contain membrane-bound organelles, such as the nucleus and mitochondria, that carry out specialized functions. Since biological membranes are only selectively permeable to solutes, they help create a compartment with controlled conditions inside an organelle. These microenvironments are tailored to the organelle's specific functions and help isolate them from the surrounding cytosol.
For example, lysosomes in the animal cells...
Additional Subnuclear Structures02:10

Additional Subnuclear Structures

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, paraspeckles, etc. These nuclear...
The Nucleus01:25

The Nucleus

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...
The Nucleus01:32

The Nucleus

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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Related Experiment Video

Updated: May 29, 2026

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy
10:57

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy

Published on: November 11, 2025

Compartmentalization of the nucleus.

Lauren Meldi1, Jason H Brickner

  • 1Department of Molecular Biosciences, Northwestern University, Evanston, Illinois, USA.

Trends in Cell Biology
|September 9, 2011
PubMed
Summary

Cellular nuclei organize chromosomes and proteins non-randomly, influencing gene expression. This spatial arrangement creates distinct environments for genes, affecting their transcriptional state and cellular function.

Area of Science:

  • Cell Biology
  • Genetics
  • Molecular Biology

Background:

  • The cell nucleus is a highly organized compartment.
  • Chromosome positioning within the nucleus is non-random and cell-type specific.
  • Protein localization is also heterogeneous within the nucleus.

Purpose of the Study:

  • To explore the spatial organization of the nucleus.
  • To understand how nuclear organization impacts gene expression.

Main Methods:

  • Analysis of chromosome positioning relative to nuclear landmarks.
  • Investigation of protein localization within the nucleus.
  • Development of a model linking nuclear organization to gene regulation.

Main Results:

More Related Videos

Quantitative Analysis of Chromatin Proteomes in Disease
08:11

Quantitative Analysis of Chromatin Proteomes in Disease

Published on: December 28, 2012

Related Experiment Videos

Last Updated: May 29, 2026

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy
10:57

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy

Published on: November 11, 2025

Quantitative Analysis of Chromatin Proteomes in Disease
08:11

Quantitative Analysis of Chromatin Proteomes in Disease

Published on: December 28, 2012

  • Non-random chromosome positioning suggests molecular mechanisms for nuclear folding.
  • Heterogeneous protein localization indicates distinct nuclear microenvironments.
  • Gene positioning within specific protein environments affects transcriptional state.

Conclusions:

  • Nuclear spatial organization is critical for regulating gene expression.
  • The interplay between chromosome folding and protein localization dictates gene activity.
  • Understanding nuclear architecture provides insights into cellular function and gene regulation.