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| Item Type: | Article |
|---|---|
| Title: | Phosphorylation-regulated axonal dependent transport of syntaxin 1 is mediated by a Kinesin-1 adapter |
| Creators Name: | Chua, J.J.E., Butkevich, E., Worseck, J.M., Kittelmann, M., Gronborg, M., Behrmann, E., Stelzl, U., Pavlos, N.J., Lalowski, M.M., Eimer, S., Wanker, E.E., Klopfenstein, D.R. and Jahn, R. |
| Abstract: | Presynaptic nerve terminals are formed from preassembled vesicles that are delivered to the prospective synapse by kinesin-mediated axonal transport. However, precisely how the various cargoes are linked to the motor proteins remains unclear. Here, we report a transport complex linking syntaxin 1a (Stx) and Munc18, two proteins functioning in synaptic vesicle exocytosis at the presynaptic plasma membrane, to the motor protein Kinesin-1 via the kinesin adaptor FEZ1. Mutation of the FEZ1 ortholog UNC-76 in Caenorhabditis elegans causes defects in the axonal transport of Stx. We also show that binding of FEZ1 to Kinesin-1 and Munc18 is regulated by phosphorylation, with a conserved site (serine 58) being essential for binding. When expressed in C. elegans, wild-type but not phosphorylation-deficient FEZ1 (S58A) restored axonal transport of Stx. We conclude that FEZ1 operates as a kinesin adaptor for the transport of Stx, with cargo loading and unloading being regulated by protein kinases. |
| Keywords: | Fasciculation and Elongation Protein zeta 1, Transport Defect, Cargo Aggregation, Animals |
| Source: | Proceedings of the National Academy of Sciences of the United States of America |
| ISSN: | 0027-8424 |
| Publisher: | National Academy of Sciences |
| Volume: | 109 |
| Number: | 15 |
| Page Range: | 5862-5867 |
| Date: | 10 April 2012 |
| Official Publication: | https://doi.org/10.1073/pnas.1113819109 |
| PubMed: | View item in PubMed |
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