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Shi Y, et al.  (2011) Two novel WD40 domain-containing proteins, Ere1 and Ere2, function in the retromer-mediated endosomal recycling pathway. Mol Biol Cell 22(21):4093-107

Abstract: Regulated secretion, nutrient uptake, and responses to extracellular signals depend on cell-surface proteins that are internalized and recycled back to the plasma membrane. However, the underlying mechanisms that govern membrane protein recycling to the cell surface are not fully known. Using a chemical-genetic screen in yeast, we show that the arginine transporter Can1 is recycled back to the cell surface via two independent pathways mediated by the sorting nexins Snx4/41/42 and the retromer complex, respectively. In addition, we identify two novel WD40-domain endosomal recycling proteins, Ere1 and Ere2, that function in the retromer pathway. Ere1 is required for Can1 recycling via the retromer-mediated pathway, but it is not required for the transport of other retromer cargoes, such as Vps10 and Ftr1. Biochemical studies reveal that Ere1 physically interacts with internalized Can1. Ere2 is present in a complex containing Ere1 on endosomes and functions as a regulator of Ere1. Taken together, our results suggest that Snx4/41/42 and the retromer comprise two independent pathways for the recycling of internalized cell-surface proteins. Moreover, a complex containing the two novel proteins Ere1 and Ere2 mediates cargo-specific recognition by the retromer pathway.

Status: Published Type: Journal Article PubMed ID: 21880895

Topics addressed in this paper

Number of different genes curated to this paper: 30

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Topics Genes linked to topics (#1 - 10 )
ATG20 CAN1 EMP47 ERP2 GSF2 IPT1 MAK10 MAK3 MAK31 MSB3
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Topics Genes linked to topics (#11 - 20 )
OSH2 PEP8 RRT2 RTT10 SNF7 SNX3 SNX4 SNX41 SSO2 STP22
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Topics Genes linked to topics (#21 - 30 )
SUR2 SUR4 SWH1 SYT1 TRS85 VPS17 VPS29 VPS35 VPS5 YPT6
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