ArticleEukaryotic cell2009
Dual sorting of the Saccharomyces cerevisiae vacuolar protein Sna4p.
Article in Eukaryotic cell, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Yeast cell death pathway requiring AP-3 vesicle trafficking leads to vacuole/lysosome membrane permeabilization.Cell reports · 2022Article
- ESCRT machinery plays a role in microautophagy in yeast.BMC molecular and cell biology · 2020Article
- Review
- The AP-3 adaptor complex mediates sorting of yeast and mammalian PQ-loop-family basic amino acid transporters to the vacuolar/lysosomal membrane.Scientific reports · 2015Article
- Article
- Plasmodium falciparum enolase complements yeast enolase functions and associates with the parasite food vacuole.Molecular and biochemical parasitology · 2011Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sna4p, a vacuolar membrane protein, belongs to a small family of proteins conserved in plants and fungi. It is transported to the vacuolar membrane via the alkaline phosphatase (ALP) pathway, which bypasses the multivesicular bodies (MVBs). Here, we show that transfer of Sna4p by the ALP route involves the AP-3 adaptor protein complex, which binds to an acidic dileucine sorting signal in the cytoplasmic region of Sna4p. In addition, Sna4p can use the MVB pathway by using a PPPY motif, which is involved in the interaction with ubiquitin ligase Rsp5p. Deletion or mutation of the Sna4p PPPY motif or a low level of Rsp5p inhibits the entrance of Sna4p into MVBs. Sna4p is polyubiquitylated on its only lysine, and Sna4p lacking this lysine shows defective MVB sorting. These data indicate that Sna4p has two functional motifs, one for interaction with the AP-3 complex, followed by entry into the ALP pathway, and one for binding Rsp5p, which directs the protein to the MVB pathway. The presence of these two motifs allows Sna4p to localize to both the vacuolar membrane and the lumen.
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Registered trials
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