Synaptotagmin I

**Definition:** A vesicular transport protein expressed predominately in NEURONS. Synaptotagmin helps regulate EXOCYTOSIS of SYNAPTIC VESICLES and appears to serve as a calcium sensor to trigger NEUROTRANSMITTER release. It also acts as a nerve cell receptor for certain BOTULINUM TOXINS.

**Tree numbers:** - D12.776.157.125.825.249 - D12.776.543.990.850.249

**Synonyms:** - Synaptic Vesicle Protein p65 - Synaptotagmin 1 - p65 Protein (Synaptotagmin I)