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Development of new peptide-based tools for studying synaptic ribbon function.

机译:开发新的基于肽的工具来研究突触带功能。

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Synaptic ribbons are proteinaceous specialized electron-dense presynaptic structures found in nonspiking sensory cells of the vertebrate nervous system. Understanding the function of these structures is an active area of research (reviewed in Matthews G, Fuchs P. Nat Rev Neurosci 11: 812-822, 2010). Previous work had shown that ribbons could be effectively labeled and visualized using peptides that bind to the synaptic ribbon protein RIBEYE via a PXDLS motif (Zenisek D, Horst NK, Merrifield C, Sterling P, Matthews G. J Neurosci 24: 9752-9759, 2004). Here, we expand on the previous work to develop new tools and strategies for 1) better visualizing synaptic ribbons, and 2) monitoring and manipulating calcium on the synaptic ribbon. Specifically, we developed a new higher-affinity peptide-based label for visualizing ribbons in live cells and two strategies for localizing calcium indicators to the synaptic ribbon.
机译:突触带是在脊椎动物神经系统的非突触感觉细胞中发现的蛋白质类专门的电子致密突触前结构。理解这些结构的功能是研究的活跃领域(在Matthews G,Fuchs P.Nat Rev Neurosci 11:812-822,2010中综述)。先前的工作表明,可以使用通过PXDLS基序与突触带蛋白RIBEYE结合的肽对带进行有效标记和可视化(Zenisek D,Horst NK,Merrifield C,Sterling P,Matthews G.J Neurosci 24:9752-9759, 2004)。在这里,我们将扩展以前的工作,以开发新的工具和策略,以用于1)更好地可视化突触带,以及2)监视和操纵突触带上的钙。具体来说,我们开发了一种新的基于高亲和力肽的标签,用于可视化活细胞中的色带,以及两种将钙指示剂定位于突触色带的策略。

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