Journal
AUTOPHAGY
Volume 5, Issue 2, Pages 217-220Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/auto.5.2.7201
Keywords
autophagy; lysosome; stress; vacuole; yeast
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Funding
- NIGMS NIH HHS [R01 GM053396, R01 GM053396-19] Funding Source: Medline
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Atg8 is a ubiquitin-like protein that controls the expansion of the phagophore during autophagosome formation. It is recruited to the phagophore during the expansion stage and released upon the completion of the autophagosome. One possible model explaining the function of Atg8 is that it acts as an adaptor of a coat complex. Here, we tested the coat-adaptor model by estimating the area density of Atg8 molecules on the phagophore. We developed a computational process to simulate the random sectioning of vesicles heterogeneous in size. This method can be applied to estimate the original sizes of intracellular vesicles from sizes of their random sections obtained through transmission electron microscopy. Using this method, we found that the estimated area density of Atg8 is comparable with that of proteins that form the COPII coat.
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