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Neuron Specific Rab4 Effector GRASP-1 Coordinates Membrane Specialization and Maturation of Recycling Endosomes

Author(s)
van der Sluijs, Peter; Kapitein, Lukas C.; Jaarsma, Dick; Rehmann, Holger; Klumperman, Judith; Heck, Albert J. R.; Monti, Maria; Govers, Roland; Oorschot, Viola; Dortland, Bjorn R.; van Vlijmen, Thijs; Wulf, Phebe S.; Sanchez-Martinez, Emma; Popa, Ioana; Hoogenraad, Casper C.; Futai, Kensuke; Sheng, Morgan Hwa-Tze; ... Show more Show less
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Abstract
The endosomal pathway in neuronal dendrites is essential for membrane receptor trafficking and proper synaptic function and plasticity. However, the molecular mechanisms that organize specific endocytic trafficking routes are poorly understood. Here, we identify GRIP-associated protein-1 (GRASP-1) as a neuron-specific effector of Rab4 and key component of the molecular machinery that coordinates recycling endosome maturation in dendrites. We show that GRASP-1 is necessary for AMPA receptor recycling, maintenance of spine morphology, and synaptic plasticity. At the molecular level, GRASP-1 segregates Rab4 from EEA1/Neep21/Rab5-positive early endosomal membranes and coordinates the coupling to Rab11-labelled recycling endosomes by interacting with the endosomal SNARE syntaxin 13. We propose that GRASP-1 connects early and late recycling endosomal compartments by forming a molecular bridge between Rab-specific membrane domains and the endosomal SNARE machinery. The data uncover a new mechanism to achieve specificity and directionality in neuronal membrane receptor trafficking.
Date issued
2010-01
URI
http://hdl.handle.net/1721.1/55386
Department
Picower Institute for Learning and Memory
Journal
PLoS Biology
Publisher
Public Library of Science
Citation
Hoogenraad, Casper C. et al. “Neuron Specific Rab4 Effector GRASP-1 Coordinates Membrane Specialization and Maturation of Recycling Endosomes.” PLoS Biol 8.1 (2010): e1000283. © 2010 Hoogenraad et al.
Version: Final published version
ISSN
1544-9173

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