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Functional Expression of Chemoreceptors with the Help of a Guanine Nucleotide Exchange Factor

机译:脱核蝶核苷酸交换因子的帮助下的化学感受器的功能表达

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Odorant receptors and other chemoreceptors are usually poorly expressed in the plasma membrane of heterologous cells. A key point of regulation in G protein—mediated sig-naling is the interconversion between the active GTP-bound and inactive GDP-bound states of the Got subunit, which regulatory proteins, such as guanine nucleotide exchange factors (GEFs), can control. GEFs stimulate formation of the GTP-bound state of Got and therefore are considered to work as positive regulators of G protein—coupled receptor signaling. Ric-8B, a GEF that is specifically expressed in olfactory sensory neurons, pro-motes functional expression of odorant receptors in HEK293T cells because it amplifies the initially low receptor signaling through Gctolf. This same strategy could be used to functionally express other types of chemoreceptors.
机译:气味受体和其他化学感受器通常在异源细胞的质膜中表达差。 G蛋白介导的SIG-NALING的一个关键调节点是有关亚基的活性GTP结合和无活性GDP结合状态之间的互连,该调节蛋白如鸟嘌呤核苷酸交换因子(GEF)可以控制。 GEF刺激形成GTP的形成,因此被认为是G蛋白偶联受体信号传导的正调节剂。 RIC-8B,一种在嗅觉感觉神经元中特别表达的GEF,HEK293T细胞中的气味受体的功能表达,因为它通过GCTOL0放大了最初的低受体信号传导。这种策略可用于在功能上表达其他类型的化学聚合物。

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