Friends and foes in synaptic transmission: the role of tomosyn in vesicle priming.

Friends and foes in synaptic transmission: the role of tomosyn in vesicle priming.
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突触传播中的朋友和敌人:tomosyn在囊泡启动中的作用。

DOI:
10.1016/j.tins.2009.01.004
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发表时间:
2009-05
影响因子:
15.9
通讯作者:
Yizhar, Ofer
Yizhar, Ofer
中科院分区:
医学1区
文献类型:
--
作者:
Ashery, Uri;Bielopolski, Noa;Barak, Boaz;Yizhar, Ofer

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启动是神经末梢的囊泡可融合的过程,它是由许多蛋白质和第二信使调节的。托莫辛是这个多元化家庭的杰出成员之一。Tomosyn已被鉴定为syntaxin结合蛋白;它抑制囊泡启动,但其作用方式尚不完全清楚。Tomosyn的抑制活性取决于其n端wd40重复结构域,并受其snare基序与Syntaxin结合的调节。本文介绍了关于Tomosyn功能的新生理信息,并在最近描述的酵母Tomosyn同源物Sro7的晶体结构框架内讨论了这些结果的可能解释。我们还提出了囊泡启动和Tomosyn参与这些过程的可能分子场景。
Priming is the process by which vesicles become available for fusion at nerve terminals and it is modulated by numerous proteins and second messengers. One of the prominent members of this diverse family is Tomosyn. Tomosyn has been identified as a Syntaxin-binding protein; it inhibits vesicle priming, but its mode of action is not fully understood. Tomosyn's inhibitory activity depends on its N-terminal WD40-repeat domain and is regulated by the binding of its SNARE-motif to Syntaxin. The present review describes new physiological information on Tomosyn's function and addresses possible interpretations of these results in the framework of the recently described crystal structure of the yeast Tomosyn homolog Sro7. We also present possible molecular scenarios for vesicle priming and the involvement of Tomosyn in these processes.
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