Reference: Suzuki SW and Emr SD (2018) Retrograde trafficking from the vacuole/lysosome membrane. None 14(9)

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Abstract


Membrane protein recycling is a fundamental process from yeast to humans. The lysosome (or vacuole in yeast) receives membrane proteins from the secretory, endocytic, and macroautophagy/autophagy pathways. Although some of these membrane proteins appear to be recycled, the molecular mechanisms underlying this retrograde trafficking are poorly understood. Our recent study revealed that the transmembrane autophagy protein Atg27 is recycled from the vacuole membrane using a 2-step recycling process. First, the Snx4 complex recycles Atg27 from the vacuole to the endosome. Then, the retromer complex mediates endosome-to-Golgi retrograde transport. Thus, 2 distinct protein complexes facilitate the sequential retrograde trafficking for Atg27. As far as we know, Atg27 is the first physiological substrate for the vacuole-to-endosome retrograde trafficking pathway.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
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Suzuki SW, Emr SD
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