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Reference: Cowles CR, et al. (1997) The AP-3 adaptor complex is essential for cargo-selective transport to the yeast vacuole. Cell 91(1):109-18

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Abstract


Three distinct adaptor protein (AP) complexes involved in protein trafficking have been identified. AP-1 and AP-2 mediate protein sorting at the trans-Golgi network and plasma membrane, respectively, whereas the function of AP-3 has not been defined. A screen for factors specifically involved in transport of alkaline phosphatase (ALP) from the Golgi to the vacuole/lysosome has identified Ap16p and Ap15p of the yeast AP-3 complex. Deletion of each of the four AP-3 subunits results in selective mislocalization of ALP and the vacuolar t-SNARE, Vam3p (but not CPS and CPY), while deletion of AP-1 and AP-2 subunits has no effect on vacuolar protein delivery. This study, therefore, provides evidence that the AP-3 complex functions in cargo-selective protein transport from the Golgi to the vacuole/lysosome.

Reference Type
Journal Article
Authors
Cowles CR, Odorizzi G, Payne GS, Emr SD
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