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Related Concept Videos

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The early endosome containing internalized molecules matures through transformations in its location, morphology, intraluminal pH, and membrane protein composition. Together, these changes result in a more acidic late endosome that contains multiple intraluminal vesicles; therefore, the late endosome is also called a multivesicular body (MVB).
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The recycling endosome, also known as the endosomal recycling compartment (ERC), is a part of the slow-recycling process of the endocytic pathway. Molecules internalized through receptor-mediated endocytosis are either degraded in the lysosomes or are recycled to the plasma membrane through the fast- or slow-recycling route.
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The endosome as engineer.

Maria Clara Zanellati1, Sarah Cohen1

  • 1Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Science (New York, N.Y.)
|December 15, 2022
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Endosomes dynamically alter their shape based on nutrient availability through sophisticated lipid signaling pathways. This process is crucial for cellular nutrient sensing and organelle adaptation.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Endosomes are key organelles involved in intracellular trafficking and sorting.
  • Organelle morphology is critical for cellular function and adaptation.
  • Lipid signaling plays a vital role in regulating cellular processes.

Purpose of the Study:

  • To investigate the role of lipid signaling in endosome shape regulation.
  • To understand how nutrient levels influence endosome morphology.
  • To elucidate the molecular mechanisms connecting nutrient sensing to organelle dynamics.

Main Methods:

  • Utilized advanced microscopy techniques to visualize endosome dynamics.
  • Employed lipidomic analyses to identify key signaling lipids.
  • Conducted genetic manipulation to probe the function of specific lipid-modifying enzymes.

Main Results:

  • Demonstrated that specific lipids directly influence endosome membrane curvature and shape.
  • Showed a direct correlation between cellular nutrient status and the abundance of regulatory lipids.
  • Identified novel lipid-modifying enzymes essential for nutrient-dependent endosome remodeling.

Conclusions:

  • Lipid signaling is a primary mechanism by which endosomes adapt their shape to nutrient availability.
  • This adaptive process is critical for maintaining cellular homeostasis under varying nutrient conditions.
  • Findings provide new insights into the dynamic nature of organelles and their response to the cellular environment.