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COG2 — Conserved Oligomeric Golgi Complex 2

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COG2 — Conserved Oligomeric Golgi Complex 2

Introduction

COG2 (Conserved Oligomeric Golgi Complex 2) is a key component of the COG complex, a multi-subunit vesicle tethering apparatus essential for proper Golgi apparatus function and intracellular membrane trafficking. COG2 is a member of lobe A of the COG complex and plays a critical role in maintaining Golgi morphology and function.

Gene Information

<div class="infobox infobox-gene">
<table>
<tr><th>Symbol</th><td>COG2</td></tr>
<tr><th>Full Name</th><td>Conserved Oligomeric Golgi Complex 2</td></tr>
<tr><th>Chromosomal Location</th><td>Chr1q25.2</td></tr>
<tr><th>NCBI Gene ID</th><td>26986</td></tr>
<tr><th>UniProt ID</th><td>Q8N5I2</td></tr>
<tr><th>Associated Diseases</th><td>CDG II, Neurodegeneration, Alzheimer's Disease, Parkinson's Disease</td></tr>
</table>
</div>

Function

COG Complex Architecture

The COG complex consists of eight subunits (COG1-8) organized into two distinct lobes[@miller2019]:

  • Lobe A (COG1-4): COG2 functions in this lobe, which is primarily involved in the early stages of retrograde trafficking
  • Lobe B (COG5-8): Handles later stages of vesicle tethering and fusion

Golgi Retrograde Trafficking

COG2 is essential for retrograde vesicle transport between Golgi cisternae, ensuring the proper recycling of Golgi resident proteins and trafficking machinery components[@blackburn2019]. This process is vital for:

  • Maintaining Golgi enzyme localization
  • Quality control of protein glycosylation
  • Proper sorting of proteins to their final destinations

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