A Voltage‐Responding Ion Channel Derived by C‐Terminal Modification of Gramicidin A

A Voltage‐Responding Ion Channel Derived by C‐Terminal Modification of Gramicidin A
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短杆菌肽 A C 末端修饰产生的电压响应离子通道

DOI:
10.1002/cbic.200700519
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发表时间:
2008
期刊:
影响因子:
3.2
通讯作者:
U. Koert
U. Koert
中科院分区:
生物学3区
文献类型:
--
作者:
P. Reiß;L. Al-Momani;U. Koert

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生物离子通道的正常功能需要确定的控制模式(门控)。[1]电压门控是在膜电位改变时通过通道孔的离子通量的响应。电压门控离子通道的结构生物学[2]以及电压调制模型通道的设计和功能研究[3]的进展有助于理解电压门控[4],也是将合成的电压调制通道植入神经元的第一步。在我们关于将合成短杆菌肽混合通道植入细胞(小梁网细胞[5]、CHO细胞[6])的研究的继续中,我们转向合成电压门控通道。末端带电的两亲性化合物[7]可以自组装成电压依赖性孔和具有永久轴向大偶极子的刚性推拉杆[8],以产生电压敏感孔。与这些自组装孔相比,短杆菌肽A(gA)的通道活性β6,3-螺旋结构明确。[9](图一)
The proper function of biological ion channels requires defined modes of control (gating).[1] Voltage gating is the response of the ionic flux through the channel pore upon a change of the membrane potential. Neuronal signal propagation relies on voltage-gated ion channels.Progress in the structural biology of voltage gated ion channels [2] and the design and functional studies [3] of voltagemodulated model channels helps in understanding voltage gating,[4] and is a first step towards the implantation of synthetic voltage-modulated channels into neurons. In a continuation of our studies on the implantation of synthetic gramicidin-hybrid channels into cells (trabecular meshwork cells,[5] CHO cells [6]), we turned to synthetic voltage-gated channels. Terminal-charged amphiphilic compounds,[7] can self-assemble into voltage-dependent pores and rigid push–pull rods [8] with permanent axial macrodipoles to give voltage-sensitive pores. Compared with these self-assembled pores, the channel-active β6, 3-helix of gramicidinA (gA) is structurally well defined.[9](Figure 1)
DOI: 10.1021/ja00121a002
发表时间: 1995-04
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发表时间: 1985
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