Journal
DEVELOPMENTAL CELL
Volume 3, Issue 6, Pages 815-824Publisher
CELL PRESS
DOI: 10.1016/S1534-5807(02)00359-3
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In the yeast Saccharomyces cerevisiae, aminopeptidase I (API), a vacuolar hydrolase, is selectively transported to the vacuole via the autophagosome. API forms a cytosol to vacuole targeting (Cvt) complex in the cytoplasm. The complex is engulfed by the autophagosome under starvation conditions. In this study, the Cvt complex is visualized as a dot in the cytoplasm by fluorescence microscopy with API-GFP. The Cvt complex associates with the preautophagosomal structure (PAS), which plays a central role in autophagosome formation. In a Deltacvt19 mutant, which is specifically defective in API transport, but not in autophagy, the Cvt complex forms normally but never associates with the PAS. This indicates that Cvt19p mediates association between the Cvt complex and the PAS.
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