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Related Experiment Videos

The binary interacting network of the conserved oligomeric Golgi tethering complex.

Eva Loh1, Wanjin Hong

  • 1Membrane Biology Laboratory, Institute of Molecular and Cell Biology, 30 Medical Dr., Singapore 117609, Singapore.

The Journal of Biological Chemistry
|March 30, 2004
PubMed
Summary

The conserved oligomeric Golgi (COG) complex assembly is detailed, revealing COG4 as a core subunit. This study maps the intermolecular interactions, providing structural insights into COG complex formation and function.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Golgi Apparatus Function

Background:

  • The conserved oligomeric Golgi (COG) complex is essential for Golgi trafficking.
  • The mammalian COG complex comprises eight subunits, with varying conservation across species.
  • Understanding COG complex assembly is crucial for elucidating its cellular roles.

Purpose of the Study:

  • To map the network of intermolecular interactions within the mammalian COG complex.
  • To elucidate the assembly pathway and structural basis of the COG complex.
  • To identify the role of specific subunits, particularly COG4, in complex formation.

Main Methods:

  • In vitro translation assays to study protein interactions.
  • Co-immunoprecipitation techniques to confirm subunit associations.

Related Experiment Videos

  • Analysis of interaction networks to model complex assembly.

    • Main Results:

    • COG4 acts as a central component, interacting with COG1, COG2, COG5, and COG7.
    • COG3 integrates via interactions with COG1 and COG2.
    • COG6 and COG8 incorporation depends on multiple subunit interactions, highlighting a hierarchical assembly process.
    • A model for COG complex assembly is proposed based on the identified interactions.

    Conclusions:

    • The study provides a detailed molecular map of COG complex assembly.
    • COG4 plays a pivotal role in the structural integrity and assembly of the COG complex.
    • The findings offer insights into the functional significance of COG complex architecture in Golgi trafficking.