FERARI is required for Rab11-dependent endocytic recycling

JA Solinger, HO Rashid, C Prescianotto-Baschong… - Nature cell …, 2020 - nature.com
JA Solinger, HO Rashid, C Prescianotto-Baschong, A Spang
Nature cell biology, 2020nature.com
Endosomal transport is essential for cellular organization and compartmentalization and cell–
cell communication. Sorting endosomes provide a crossroads for various trafficking
pathways and determine recycling, secretion or degradation of proteins. The organization of
these processes requires membrane-tethering factors to coordinate Rab GTPase function
with membrane fusion. Here, we report a conserved tethering platform that acts in the Rab11
recycling pathways at sorting endosomes, which we name factors for endosome recycling …
Abstract
Endosomal transport is essential for cellular organization and compartmentalization and cell–cell communication. Sorting endosomes provide a crossroads for various trafficking pathways and determine recycling, secretion or degradation of proteins. The organization of these processes requires membrane-tethering factors to coordinate Rab GTPase function with membrane fusion. Here, we report a conserved tethering platform that acts in the Rab11 recycling pathways at sorting endosomes, which we name factors for endosome recycling and Rab interactions (FERARI). The Rab-binding module of FERARI consists of Rab11FIP5 and rabenosyn-5/RABS-5, while the SNARE-interacting module comprises VPS45 and VIPAS39. Unexpectedly, the membrane fission protein EHD1 is also a FERARI component. Thus, FERARI appears to combine fusion activity through the SM protein VPS45 with pinching activity through EHD1 on SNX-1-positive endosomal membranes. We propose that coordination of fusion and pinching through a kiss-and-run mechanism drives cargo at endosomes into recycling pathways.
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