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Related Concept Videos

Eukaryotic Compartmentalization01:37

Eukaryotic Compartmentalization

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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.
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Eukaryotic Compartmentalization01:46

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Eukaryotic Compartmentalizations01:46

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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...
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Subcellular Fractionation01:32

Subcellular Fractionation

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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
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Interactions Between Signaling Pathways01:19

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
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Overview Of Cell Separation And Isolation01:20

Overview Of Cell Separation And Isolation

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Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.
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Phase Separation: Linking Cellular Compartmentalization to Disease.

Adriano Aguzzi1, Matthias Altmeyer2

  • 1Institute of Neuropathology, University of Zurich, Schmelzbergstrasse 12, CH-8091 Zurich, Switzerland.

Trends in Cell Biology
|April 8, 2016
PubMed
Summary
This summary is machine-generated.

Eukaryotic cells use membraneless compartments formed by liquid demixing to organize biochemical reactions. This process, liquid-liquid phase separation, offers insights into cellular organization and diseases like cancer and neurodegeneration.

Keywords:
intrinsically disordered proteinsliquid demixinglow-complexity domainsneurodegenerationphase transitionprotein assembly and aggregation

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Biophysics

Background:

  • Eukaryotic cells organize biochemical reactions through intracellular compartmentalization.
  • Compartments are formed by membranes (organelles) or via novel membraneless mechanisms.
  • Membraneless compartmentalization involves liquid demixing and liquid-liquid phase separation.

Purpose of the Study:

  • To explore the concept of membraneless compartmentalization via liquid demixing.
  • To understand the dynamic reorganization of subcellular space.
  • To investigate the role of phase separation in pathological protein assembly.

Main Methods:

  • Literature review of recent studies on liquid demixing and phase separation.
  • Analysis of the biophysical principles governing membraneless organelles.
  • Connecting phase separation dynamics to cellular functions and disease.

Main Results:

  • Liquid demixing drives the formation of functional membraneless compartments within cells.
  • Phase separation provides a mechanism for dynamic spatial and temporal regulation of cellular processes.
  • Aberrant phase separation is implicated in the pathogenesis of cancer and neurodegenerative diseases.

Conclusions:

  • Membraneless compartmentalization through liquid-liquid phase separation is a fundamental cellular organizing principle.
  • Understanding phase separation is crucial for deciphering cellular dynamics and disease mechanisms.
  • This framework offers new avenues for therapeutic strategies targeting protein aggregation disorders.