Dang, P., Smythe, E. and Furley, A. J. orcid.org/0000-0001-5549-8668 (2012) TAG1 regulates the endocytic trafficking and signaling of the semaphorin3A receptor complex. Journal of Neuroscience, 32 (30). pp. 10370-10382. ISSN 0270-6474
Abstract
Endocytic trafficking of membrane proteins is essential for neuronal structure and function. We show that Transient Axonal Glycoprotein 1 (TAG1 or CNTN2), a contactin-related adhesion molecule, plays a central role in the differential trafficking of components of the semaphorin3A (Sema3A) receptor complex into distinct endosomal compartments in murine spinal sensory neuron growth cones. The semaphorin3A receptor is composed of Neuropilin1 (NRP1), PlexinA4, and L1, with NRP1 being the ligand-binding component. TAG1 interacts with NRP1, causing a change in its association with L1 in the Sema3A response such that L1 is lost from the complex following Sema3A binding. Initially, however, L1 and NRP1 endocytose together and only become separated intracellularly, with NRP1 becoming associated with endosomes enriched in lipid rafts and colocalizing with TAG1 and PlexinA4. When TAG1 is missing, NRP1 and L1 fail to separate and NRP1 does not become raft associated; colocalization with PlexinA4 is reduced and Plexin signaling is not initiated. These observations identify a novel role for TAG1 in modulating the intracellular sorting of signaling receptor complexes.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2012 the authors. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Animals; Contactin 2; Endocytosis; Growth Cones; Mice; Mice, Knockout; Nerve Tissue Proteins; Neural Cell Adhesion Molecule L1; Neuropilin-1; Receptors, Cell Surface; Semaphorin-3A; Sensory Receptor Cells; Signal Transduction |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Biosciences (Sheffield) > Department of Biomedical Science (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 27 Mar 2017 15:51 |
Last Modified: | 27 Mar 2017 15:56 |
Published Version: | http://dx.doi.org/10.1523/JNEUROSCI.5874-11.2012 |
Status: | Published |
Publisher: | Society for Neuroscience |
Refereed: | Yes |
Identification Number: | 10.1523/JNEUROSCI.5874-11.2012 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:108804 |