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Maintaining order: COG complex controls Golgi trafficking, processing, and sorting.

Jessica B Blackburn1, Zinia D'Souza1, Vladimir V Lupashin1

  • 1Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.

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|August 6, 2019
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Summary
This summary is machine-generated.

The conserved oligomeric Golgi (COG) complex regulates Golgi homeostasis and intra-Golgi trafficking. COG defects cause severe congenital disorders of glycosylation (CDG) in humans.

Keywords:
SNARECOG complexGolgiglycosylationtethersvesicular trafficking

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • The conserved oligomeric Golgi (COG) complex is a key tethering factor essential for intra-Golgi membrane trafficking.
  • COG ensures Golgi homeostasis by orchestrating retrograde vesicle targeting.
  • Defects in the COG complex are linked to severe multisystemic diseases, specifically COG-congenital disorders of glycosylation (COG-CDG).

Purpose of the Study:

  • To review current knowledge on COG-related trafficking and glycosylation defects.
  • To analyze the molecular mechanisms underlying COG-orchestrated vesicle targeting.
  • To consolidate understanding of COG complex function in health and disease.

Main Methods:

  • Literature review of studies on COG complex function.
  • Analysis of molecular interactions involving COG, SNAREs, Rabs, and other trafficking proteins.
  • Examination of data from human patients and model organisms with COG defects.

Main Results:

  • The COG complex physically and functionally interacts with key intra-Golgi trafficking machinery.
  • COG defects disrupt retrograde vesicle targeting, leading to impaired Golgi function.
  • Evidence from human diseases and model organisms highlights the critical role of COG in glycosylation.

Conclusions:

  • The COG complex is indispensable for maintaining Golgi integrity and function.
  • Understanding COG-mediated trafficking is crucial for deciphering the pathogenesis of COG-CDG.
  • Further research into COG's molecular mechanisms may reveal therapeutic strategies for glycosylation disorders.