Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

SNARE [soluble NSF ( N -ethylmaleimide-sensitive factor) attachment protein receptor] proteins are essential for membrane fusion but their regulation is not yet fully understood. We have previously shown that the amino-terminal Longin domain of the v-SNARE TI-VAMP (tetanus neurotoxin-insensitive vesicle-associated membrane protein)/VAMP7 plays an inhibitory role in neurite outgrowth. The goal of this study was to investigate the regulation of TI-VAMP as a model of v-SNARE regulation. We show here that the Longin domain (LD) plays a dual role. First, it negatively regulates the ability of TI-VAMP and of a Longin/Synaptobrevin chimera to participate in SNARE complexes. Second, it interacts with the adaptor complex AP-3 and this interaction targets TI-VAMP to late endosomes. Accordingly, in mocha cells lacking AP-3δ, TI-VAMP is retained in an early endosomal compartment. Furthermore, TI-VAMPc, an isoform of TI-VAMP lacking part of the LD, does not interact with AP-3, and therefore is not targeted to late endosomes; however, this shorter LD still inhibits SNARE-complex formation. These findings support a mechanism controlling both localization and function of TI-VAMP through the LD and clathrin adaptors. Moreover, they point to the amino-terminal domains of SNARE proteins as multifunctional modules responsible for the fine tuning of SNARE function.

Bibliography

Martinez-Arca, S., Rudge, R., Vacca, M., Raposo, G., Camonis, J., Proux-Gillardeaux, V., Daviet, L., Formstecher, E., Hamburger, A., Filippini, F., D’Esposito, M., & Galli, T. (2003). A dual mechanism controlling the localization and function of exocytic v-SNAREs. Proceedings of the National Academy of Sciences, 100(15), 9011–9016.

Authors 12
  1. Sonia Martinez-Arca (first)
  2. Rachel Rudge (additional)
  3. Marcella Vacca (additional)
  4. Graça Raposo (additional)
  5. Jacques Camonis (additional)
  6. Véronique Proux-Gillardeaux (additional)
  7. Laurent Daviet (additional)
  8. Etienne Formstecher (additional)
  9. Alexandre Hamburger (additional)
  10. Francesco Filippini (additional)
  11. Maurizio D'Esposito (additional)
  12. Thierry Galli (additional)
Dates
Type When
Created 22 years, 1 month ago (July 22, 2003, 3:39 p.m.)
Deposited 3 years, 4 months ago (April 25, 2022, 9:29 p.m.)
Indexed 1 month, 1 week ago (July 19, 2025, 11:46 p.m.)
Issued 22 years, 1 month ago (July 9, 2003)
Published 22 years, 1 month ago (July 9, 2003)
Published Online 22 years, 1 month ago (July 9, 2003)
Published Print 22 years, 1 month ago (July 22, 2003)
Funders 0

None

@article{Martinez_Arca_2003, title={A dual mechanism controlling the localization and function of exocytic v-SNAREs}, volume={100}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.1431910100}, DOI={10.1073/pnas.1431910100}, number={15}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Martinez-Arca, Sonia and Rudge, Rachel and Vacca, Marcella and Raposo, Graça and Camonis, Jacques and Proux-Gillardeaux, Véronique and Daviet, Laurent and Formstecher, Etienne and Hamburger, Alexandre and Filippini, Francesco and D’Esposito, Maurizio and Galli, Thierry}, year={2003}, month=jul, pages={9011–9016} }