Synaptotagmin-11 (SYT11)

Synaptotagmin-11 (SYT11) is a vesicle-associated membrane protein of the synaptotagmin family, primarily expressed throughout the brain and essential for neuronal vesicular trafficking[1][3]. Unlike classic synaptotagmins such as SYT1, SYT11 lacks functional Ca²⁺, phospholipid, and SNARE binding, and instead acts as a regulator of vesicle trafficking and endocytosis, particularly as an inhibitor of clathrin-mediated and bulk endocytosis[4]. SYT11 mediates the assembly and trafficking of presynaptic signaling complexes, including GABA_B receptors and Cav2.2 channels, acting as a vesicular scaffold that facilitates the proper localization and stability of these components at the neuronal plasma membrane by inhibiting their endocytosis[2]. Genetic studies and functional models implicate SYT11 in neurodegenerative diseases such as Parkinson’s disease and psychiatric disorders such as schizophrenia; mutations or altered regulation of SYT11 disrupt vesicle trafficking, synaptic plasticity, and memory, and can modulate α-synuclein aggregation in neurons[1][3]. Whole-animal SYT11 knockout is lethal in mice, revealing an essential role in development and survival, while conditional neuronal knockouts exhibit specific deficits in synaptic potentiation and memory, but not basic neurotransmission[1][3]. No approved drugs are known to directly target SYT11, but its role in vesicle trafficking makes it a subject of interest in neurodegenerative disease biology.

Other names

Synaptotagmin-11SYT11KIAA0080SytXIMGC10881MGC17226DKFZp781D015Synaptotagmin XISYT12sytXIsynaptotagmin 12