The retromer complex is a conserved cytoplasmic coat complex that mediates the endosome-to-Golgi retrieval of vacuole/lysosome hydrolase receptors in yeast and mammals. The recognition of cargo proteins by the retromer is performed by the Vps35p/VPS35 (where Vps is vacuolar protein sorting) component, which together with Vps26p/VPS26 and Vps29p/VPS29, forms the cargo-selective subcomplex. In this report, we have identified a highly-conserved region of Vps35p/VPS35 that is essential for the interaction with Vps26p/VPS26 and for assembly of the retromer complex. Mutation of residues within the conserved region results in Vps35p/VPS35 mutants, which cannot bind to Vps26p/VPS26 and are not efficiently targeted to the endosomal membrane. These data implicate Vps26p/VPS26 in regulating Vps35p/VPS35 membrane association and therefore suggest a role for Vps26p/VPS26 in cargo recognition.
Identification of a conserved motif required for Vps35p/Vps26p interaction and assembly of the retromer complex
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Suzanne Gokool, Daniel Tattersall, Jonathan V. Reddy, Matthew N. J. Seaman; Identification of a conserved motif required for Vps35p/Vps26p interaction and assembly of the retromer complex. Biochem J 1 December 2007; 408 (2): 287–295. doi: https://doi.org/10.1042/BJ20070555
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