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首页> 外文期刊>Neuron >Syntaphilin: a syntaxin-1 clamp that controls SNARE assembly.
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Syntaphilin: a syntaxin-1 clamp that controls SNARE assembly.

机译:Syntaphilin:一种控制SNARE装配的syntaxin-1钳位。

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摘要

Syntaxin-1 is a key component of the synaptic vesicle docking/fusion machinery that forms the SNARE complex with VAMP/synaptobrevin and SNAP-25. Identifying proteins that modulate SNARE complex formation is critical for understanding the molecular mechanisms underlying neurotransmitter release and its modulation. We have cloned and characterized a protein called syntaphilin that is selectively expressed in brain. Syntaphilin competes with SNAP-25 for binding to syntaxin-1 and inhibits SNARE complex formation by absorbing free syntaxin-1. Transient overexpression of syntaphilin in cultured hippocampal neurons significantly reduces neurotransmitter release. Furthermore, introduction of syntaphilin into presynaptic superior cervical ganglion neurons in culture inhibits synaptic transmission. These findings suggest that syntaphilin may function as a molecular clamp that controls free syntaxin-1 availability for the assembly of the SNARE complex, and thereby regulates synaptic vesicle exocytosis.
机译:Syntaxin-1是突触小泡对接/融合机制的关键组成部分,与VAMP /突触素和SNAP-25形成SNARE复合体。鉴定可调节SNARE复合物形成的蛋白质对于理解神经递质释放及其调控的分子机制至关重要。我们已经克隆并鉴定了一种在大脑中选择性表达的称为突触蛋白的蛋白。 Syntaphilin与SNAP-25竞争与语法1的结合,并通过吸收游离语法1抑制SNARE复合物的形成。在培养的海马神经元中突触蛋白的瞬时过表达显着降低了神经递质的释放。此外,将突触蛋白引入培养中的突触前上颈神经节神经元可抑制突触传递。这些发现表明突触蛋白可作为分子钳,其控制SNARE复合物组装的自由syntaxin-1的可用性,从而调节突触小泡的胞吐作用。

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