| First Author | He E | Year | 2017 |
| Journal | Nat Commun | Volume | 8 |
| Pages | 15915 | PubMed ID | 28635948 |
| Mgi Jnum | J:250391 | Mgi Id | MGI:5920977 |
| Doi | 10.1038/ncomms15915 | Citation | He E, et al. (2017) Munc13-1 and Munc18-1 together prevent NSF-dependent de-priming of synaptic vesicles. Nat Commun 8:15915 |
| abstractText | Synaptic transmission requires a stable pool of release-ready (primed) vesicles. Here we show that two molecules involved in SNARE-complex assembly, Munc13-1 and Munc18-1, together stabilize release-ready vesicles by preventing de-priming. Replacing neuronal Munc18-1 by a non-neuronal isoform Munc18-2 (Munc18-1/2SWAP) supports activity-dependent priming, but primed vesicles fall back into a non-releasable state (de-prime) within seconds. Munc13-1 deficiency produces a similar defect. Inhibitors of N-ethylmaleimide sensitive factor (NSF), N-ethylmaleimide (NEM) or interfering peptides, prevent de-priming in munc18-1/2SWAP or munc13-1 null synapses, but not in CAPS-1/2 null, another priming-deficient mutant. NEM rescues synaptic transmission in munc13-1 null and munc18-1/2SWAP synapses, in acute munc13-1 null slices and even partially in munc13-1/2 double null synapses. Together these data indicate that Munc13-1 and Munc18-1, but not CAPS-1/2, stabilize primed synaptic vesicles by preventing NSF-dependent de-priming. |
