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A trimeric protein complex functions as a synaptic chaperone machine.

Authors: Tobaben, S  Thakur, P  Fernández-Chacón, R  Südhof, T C  Rettig, J  Stahl, B 
Citation: Tobaben S, etal., Neuron. 2001 Sep 27;31(6):987-99.
Pubmed: (View Article at PubMed) PMID:11580898

We identify a chaperone complex composed of (1) the synaptic vesicle cysteine string protein (CSP), thought to function in neurotransmitter release, (2) the ubiquitous heat-shock protein cognate Hsc70, and (3) the SGT protein containing three tandem tetratricopeptide repeats. These three proteins interact with each other to form a stable trimeric complex that is located on the synaptic vesicle surface, and is disrupted in CSP knockout mice. The CSP/SGT/Hsc70 complex functions as an ATP-dependent chaperone that reactivates a denatured substrate. SGT overexpression in cultured neurons inhibits neurotransmitter release, suggesting that the CSP/SGT/Hsc70 complex is important for maintenance of a normal synapse. Taken together, our results identify a novel trimeric complex that functions as a synapse-specific chaperone machine.

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RGD Object Information
RGD ID: 13702369
Created: 2018-07-18
Species: All species
Last Modified: 2018-07-18
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.