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.
| Symbol | COG2 |
|---|---|
| Full Name | Conserved Oligomeric Golgi Complex 2 |
| Chromosomal Location | Chr1q25.2 |
| NCBI Gene ID | 26986 |
| UniProt ID | Q8N5I2 |
| Associated Diseases | CDG II, Neurodegeneration, Alzheimer's Disease, Parkinson's Disease |
The COG complex consists of eight subunits (COG1-8) organized into two distinct lobes[1]:
COG2 is essential for retrograde vesicle transport between Golgi cisternae, ensuring the proper recycling of Golgi resident proteins and trafficking machinery components[2]. This process is vital for:
The COG complex, including COG2, indirectly influences protein glycosylation by maintaining the localization and activity of glycosyltransferases in the Golgi[3]. Proper glycosylation is essential for:
COG2 dysfunction contributes to Alzheimer's disease pathogenesis through several mechanisms[4]:
The role of COG2 in Parkinson's disease includes[5]:
COG2 has been implicated in[6]:
COG2 (Q8N5I2) is an 182 kDa protein with:
Mutations in COG2 cause a form of congenital disorder of glycosylation type II (CDG-II), characterized by[7]:
Understanding COG2 function offers potential therapeutic strategies:
Miller VJ, Ungar DR, Reinke CW, Puthenveedu MA, Glick BS. The COG complex in Golgi biology and disease. Seminars in Cell & Developmental Biology. 2019. ↩︎
Blackburn JB, D'Souza Z, Lupashin VV. Maintaining order: COG complex controls Golgi retrieval, enzyme sorting, and lipid homeostasis. Traffic. 2019. ↩︎
Freeze HH, Eklund EA, Ng BG, Patterson MC. Neurology of inherited glycosylation disorders. Lancet Neurology. 2012. ↩︎
Joshi G, Chi Y, Huang Z, Wang Y. Golgi dysfunction in Alzheimer's disease. Molecular Neurobiology. 2014. ↩︎
Hu J, Li G, Liang L, et al. The role of the Golgi apparatus in the pathogenesis of Parkinson's disease. Translational Neurodegeneration. 2020. ↩︎
Liu WW, Good PJ. Golgi trafficking defects in neurodegenerative diseases. Neural Regeneration Research. 2019. ↩︎
Ng BG, Freeze HH. Human glycosylation disorders. Current Opinion in Genetic Development. 2018. ↩︎