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Pubmed ID :20065092
Publication Date : //

The conserved oligomeric Golgi complex is involved in double-membrane vesicle formation during autophagy.


Macroautophagy is a catabolic pathway used for the turnover of long-lived proteins and organelles in eukaryotic cells. The morphological hallmark of this process is the formation of double-membrane autophagosomes that sequester cytoplasm. Autophagosome formation is the most complex part of macroautophagy, and it is a dynamic event that likely involves vesicle fusion to expand the initial sequestering membrane, the phagophore; however, essentially nothing is known about this process including the molecular components involved in vesicle tethering and fusion. In this study, we provide evidence that the subunits of the conserved oligomeric Golgi (COG) complex are required for double-membrane cytoplasm to vacuole targeting vesicle and autophagosome formation. COG subunits localized to the phagophore assembly site and interacted with Atg (autophagy related) proteins. In addition, mutations in the COG genes resulted in the mislocalization of Atg8 and Atg9, which are critical components involved in autophagosome formation.

Authors : Yen Wei-Lien , Shintani Takahiro , Nair Usha , Cao Yang , Richardson Brian C , Li Zhijian , Hughson Frederick M , Baba Misuzu , Klionsky Daniel J ,

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