snt-1 encodes two proteins, SNT-1A and SNT-1B, orthologous to synaptotagmin; SNT-1 is required for synaptic vesicle exocytosis and neurotransmitter release as well as for synaptic vesicle recycling via clathrin-mediated endocytosis; accordingly, snt-1 activity is required for a variety of behaviors including pharyngeal pumping, locomotion, and defecation; SNT-1A and SNT-1B isoforms are expressed in neurons, with SNT-1A typically expressed at higher levels, and in a greater number of neurons, than SNT-1B; in addition, SNT-1B is exclusively expressed in the excretory duct cell and a group of tail neurons including DVB, a GABAergic neuron required for defecation.
Enables calcium ion sensor activity and calcium-dependent phospholipid binding activity. Involved in several processes, including defecation; regulation of pharyngeal pumping; and synaptic vesicle endocytosis. Located in synaptic vesicle. Expressed in several structures, including excretory gland cell; gonad; nervous system; pharyngeal gland cell; and rectal gland cell. Human ortholog(s) of this gene implicated in congenital myasthenic syndrome 7. Is an ortholog of human SYT1 (synaptotagmin 1).