Neuronal SNARE complex assembly guided by Munc18‐1 and Munc13‐1

Abstract

Neurotransmitter release by Ca2+‐triggered synaptic vesicle exocytosis is essential for information transmission in the nervous system. The soluble N‐ethylmaleimide sensitive factor attachment protein receptors (SNAREs) syntaxin‐1, SNAP‐25, and synaptobrevin‐2 form the SNARE complex to bring synaptic vesicles and the plasma membranes together and to catalyze membrane fusion. Munc18‐1 and Munc13‐1 regulate synaptic vesicle priming via orchestrating neuronal SNARE complex assembly. In this review, we summarize recent advances toward the functions and molecular mechanisms of Munc18‐1 and Munc13‐1 in guiding neuronal SNARE complex assembly, and discuss the functional similarities and differences between Munc18‐1 and Munc13‐1 in neurons and their homologs in other intracellular membrane trafficking systems.

Keywords

• Munc13
• Munc18
• SNARE complex assembly
• SNAREs
• synaptic exocytosis
• synaptic vesicle fusion