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Title: A role for sorting nexin 27 in AMPA receptor trafficking
Authors: Loo, Li Shen
Tang, Ning
Al-Haddawi, Muthafar
Stewart Dawe, Gavin
Hong, Wanjin
Keywords: DRNTU::Science::Medicine
Issue Date: 2014
Source: Loo, L. S., Tang, N., Al-Haddawi, M., Stewart Dawe, G., & Hong, W. (2014). A role for sorting nexin 27 in AMPA receptor trafficking. Nature Communications, 5, 3176.
Series/Report no.: Nature communications
Abstract: Sorting nexin 27 (SNX27), a PDZ domain-containing endosomal protein, was recently shown to modulate glutamate receptor recycling in Down’s syndrome. However, the precise molecular role of SNX27 in GluA1 trafficking is unclear. Here we report that SNX27 is enriched in dendrites and spines, along with recycling endosomes. Significantly, the mobilization of SNX27 along with recycling endosomes into spines was observed. Mechanistically, SNX27 interacts with K-ras GTPase via the RA domain; and following chemical LTP stimuli, K-ras is recruited to SNX27-enriched endosomes through a Ca2þ/CaM-dependent mechanism, which in turn drives the synaptic delivery of homomeric GluA1 receptors. Impairment of SNX27 prevents LTP and associated trafficking of AMPARs. These results demonstrate a role for SNX27 in neuronal plasticity, provide a molecular explanation for the K-ras signal during LTP and identify SNX27 as the PDZ-containing molecular linker that couples the plasticity stimuli to the delivery of postsynaptic cargo.
ISSN: 2041-1723
DOI: 10.1038/ncomms4176
Schools: Lee Kong Chian School of Medicine (LKCMedicine) 
Rights: © 2014 Macmillan Publishers Limited. This is the author created version of a work that has been peer reviewed and accepted for publication by Nature Communications, Macmillan Publishers Limited. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:LKCMedicine Journal Articles

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