Publication Date:
2010-08-28
Description:
Presynaptic nerve terminals release neurotransmitters repeatedly, often at high frequency, and in relative isolation from neuronal cell bodies. Repeated release requires cycles of soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE)-complex assembly and disassembly, with continuous generation of reactive SNARE-protein intermediates. Although many forms of neurodegeneration initiate presynaptically, only few pathogenic mechanisms are known, and the functions of presynaptic proteins linked to neurodegeneration, such as alpha-synuclein, remain unclear. Here, we show that maintenance of continuous presynaptic SNARE-complex assembly required a nonclassical chaperone activity mediated by synucleins. Specifically, alpha-synuclein directly bound to the SNARE-protein synaptobrevin-2/vesicle-associated membrane protein 2 (VAMP2) and promoted SNARE-complex assembly. Moreover, triple-knockout mice lacking synucleins developed age-dependent neurological impairments, exhibited decreased SNARE-complex assembly, and died prematurely. Thus, synucleins may function to sustain normal SNARE-complex assembly in a presynaptic terminal during aging.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3235365/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3235365/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Burre, Jacqueline -- Sharma, Manu -- Tsetsenis, Theodoros -- Buchman, Vladimir -- Etherton, Mark R -- Sudhof, Thomas C -- 075615/Wellcome Trust/United Kingdom -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2010 Sep 24;329(5999):1663-7. doi: 10.1126/science.1195227. Epub 2010 Aug 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Cellular Physiology, and Howard Hughes Medical Institute, Stanford University, 1050 Arastradero Road, Palo Alto, CA 94304-5543, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20798282" target="_blank"〉PubMed〈/a〉
Keywords:
*Aging
;
Animals
;
Cell Line
;
Cells, Cultured
;
HSP40 Heat-Shock Proteins/metabolism
;
Humans
;
Membrane Fusion
;
Membrane Proteins/metabolism
;
Mice
;
Mice, Knockout
;
Mice, Transgenic
;
Nerve Degeneration/*metabolism
;
Neurons/*metabolism
;
Presynaptic Terminals/*metabolism
;
Protein Binding
;
Rats
;
Recombinant Fusion Proteins/metabolism
;
SNARE Proteins/*metabolism
;
Vesicle-Associated Membrane Protein 2/metabolism
;
alpha-Synuclein/chemistry/genetics/*metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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