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Related Concept Videos

Golgi Apparatus01:49

Golgi Apparatus

As they leave the Endoplasmic Reticulum (ER), properly folded and assembled proteins are selectively packaged into vesicles. These vesicles are transported by microtubule-based motor proteins and fuse together to form vesicular tubular clusters, subsequently arriving at the Golgi apparatus, a eukaryotic endomembrane organelle that often has a distinctive ribbon-like appearance.
The Early Endosome: Endocytosis of Transferrin01:28

The Early Endosome: Endocytosis of Transferrin

Essential proteins such as insulin or low-density lipoprotein (LDL) and micronutrients such as iron enter a eukaryotic cell through receptor-mediated endocytosis. Subsequently, the early endosomes fuse with the vesicles containing such receptor-ligand complexes and play a vital role in sorting the incoming ligands and receptors. While the ligands are either degraded inside the vesicle or released into the cytosol, their receptors are returned to the plasma membrane for further rounds of...
Maturation of Endosomes01:28

Maturation of Endosomes

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).
Changes in location
The maturing endosome moves along microtubules from the periphery of the cell towards the perinuclear region. This movement of the...
Recycling Endosomes and Transcytosis00:58

Recycling Endosomes and Transcytosis

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.
The recycling endosome is not a single organelle but an extensively tubulated network of recycling pathways. It functions in storing molecules or transporting them across...
Introduction to Membrane Traffic01:44

Introduction to Membrane Traffic

The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
The transport of soluble and membrane proteins is mediated by transport vesicles that collect cargo from one cellular compartment and deliver it to another by fusing with the target organelle membrane. The Rab...
Golgi Apparatus01:09

Golgi Apparatus

Properly folded and assembled proteins are selectively packaged into vesicles that exit the ER. Motor proteins transport these vesicles to the Golgi apparatus for adding modifications that make these proteins functional at their destination.
The Golgi apparatus is a eukaryotic organelle that has a distinctive ribbon-like appearance. It is a primary sorting and dispatch station for cargo arriving from the ER. Newly arriving vesicles enter the cis face of the Golgi, closest to the ER, and are...

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Related Experiment Video

Updated: May 14, 2026

In Vitro Polymerization of F-actin on Early Endosomes
12:15

In Vitro Polymerization of F-actin on Early Endosomes

Published on: August 28, 2017

The endosomal network.

D A Brooks1

  • 1Molecular Medicine Sector, Sansom Institute, School of Pharmacy and Medical Science, University of South Australia, Adelaide, Australia. doug.brooks@unisa.edu.au

International Journal of Clinical Pharmacology and Therapeutics
|December 31, 2009
PubMed
Summary
This summary is machine-generated.

Endocytosis captures molecules via cell membranes for intracellular delivery through the endosomal network. Disruptions in this process are linked to lysosomal storage diseases (LSDs) pathology.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Pathology

Background:

  • Endocytosis is a cellular process for internalizing extracellular molecules.
  • The endosomal network directs internalized material to lysosomes for degradation.
  • Mannose-6-phosphate receptor trafficking is crucial for enzyme replacement therapy in lysosomal storage diseases (LSDs).

Purpose of the Study:

  • To review the characteristics of the endosomal network.
  • To discuss the role of vesicular trafficking and intracellular signaling in LSD pathology.

Main Methods:

  • Literature review of endocytosis and endosomal trafficking.
  • Analysis of the role of the endosomal network in cellular processes.
  • Examination of potential links between endosomal dysfunction and LSDs.

Main Results:

  • The endosomal network is essential for delivering molecules to lysosomes.
  • Defects in vesicular trafficking or signaling within the endosomal network can contribute to LSDs.
  • Understanding endosomal pathways is key to developing therapies for LSDs.

Conclusions:

  • The endosomal network's structure and function are critical for cellular homeostasis.
  • Disturbances in endosomal trafficking and signaling are implicated in the pathogenesis of LSDs.
  • Further research into the endosomal network may reveal novel therapeutic strategies for LSDs.