Retro Is Cool: Structure of the Versatile Retromer Complex.

In this issue of Structure, Kendall et al. (2020) reveal the cryo-EM structure of the mammalian retromer complex, which is essential in sorting membrane proteins in endosomes. The retromer heterotrimer can oligomerize in multiple conformations; this versatility is promoted by a flexible interface of electrostatic residues on the VPS35 subunit.