Munc13 structural transitions and oligomers that may choreograph successive stages in vesicle priming for neurotransmitter release

Author:

Grushin Kirill1,Kalyana Sundaram R. Venkat1ORCID,Sindelar Charles V.2ORCID,Rothman James E.1ORCID

Affiliation:

1. Department of Cell Biology, Yale University, New Haven, CT 06520

2. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520

Abstract

Significance The speed of neural information processing in the human central nervous system is ultimately determined by the speed of chemical transmission at synapses, because action potentials have relatively short distances to traverse. The release of synaptic vesicles containing neurotransmitters must therefore be remarkably fast as compared to other forms of membrane fusion. Six separate SNARE complexes cooperate to achieve this. But how can exactly six copies be assembled under every vesicle? Here we report that six copies of the key molecular chaperone that assembles the SNAREs can arrange themselves into a closed hexagon, providing the likely answer.

Funder

HHS | National Institutes of Health

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

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