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Rapid Lipid Droplet Isolation Protocol Using a Well-established Organelle Isolation Kit
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Droplet organelles?

Edward M Courchaine1, Alice Lu1, Karla M Neugebauer2

  • 1Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA.

The EMBO Journal
|July 1, 2016
PubMed
Summary
This summary is machine-generated.

Cells form non-bilayer compartments called "droplet organelles" via liquid-liquid phase separation (LLPS). These structures, driven by proteins and RNA, are crucial in cellular functions and implicated in diseases like amyotrophic lateral sclerosis (ALS).

Keywords:
Liquid‐liquid phase separationRNP granuleslow‐complexity domainnuclear bodies

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Biophysics

Background:

  • Cells contain numerous molecularly distinct compartments not enclosed by lipid bilayers.
  • These structures, known as bodies, granules, or organelles, are vital for cellular activities.
  • Recent evidence suggests liquid-liquid phase separation (LLPS) drives their formation, leading to the term 'droplet organelle'.

Purpose of the Study:

  • To provide an overview of the organizational principles of "droplet organelles" in healthy and diseased cells.
  • To connect protein biochemistry with cell physiology in the context of phase-separated structures.
  • To highlight the role of low-complexity proteins and RNA in these cellular compartments.

Main Methods:

  • Literature review of recent publications on phase-separated cellular structures.
  • Analysis of the role of low-complexity proteins and RNA in determining the physical properties of these structures.
  • Connecting protein biochemistry and cell physiology to understand "droplet organelle" formation and function.

Main Results:

  • Liquid-liquid phase separation (LLPS) is a key mechanism for forming non-bilayer cellular compartments, termed "droplet organelles".
  • Low-complexity proteins and RNA play critical roles in defining the physical characteristics of these phase-separated structures.
  • Proteins associated with "droplet organelles" are frequently implicated in human diseases, including amyotrophic lateral sclerosis (ALS).

Conclusions:

  • "Droplet organelles" represent a significant class of cellular compartments formed by LLPS.
  • Understanding the biochemical and biophysical properties of these structures is crucial for comprehending cell physiology and disease.
  • Further research into these organelles may reveal new therapeutic targets for diseases linked to protein aggregation and dysfunction.