Nanodomain coupling between Ca²⁺ channels and sensors of exocytosis at fast mammalian synapses.

Nanodomain coupling between Ca²⁺ channels and sensors of exocytosis at fast mammalian synapses.
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DOI:
10.1038/nrn3125
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发表时间:
2011-12-20
影响因子:
34.7
通讯作者:
Jonas, Peter
Jonas, Peter
中科院分区:
医学1区
文献类型:
--
作者:
Eggermann, Emmanuel;Bucurenciu, Iancu;Goswami, Sarit Pati;Jonas, Peter

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突触前Ca 2+通道和触发含神经递质囊泡胞吐的Ca 2+传感器之间的物理距离是神经系统中突触信号传导特性的关键决定因素。最近的功能分析表明,在一些快速中枢突触中,递质释放是由少量的Ca 2+通道触发的,这些通道在纳米尺度上与Ca 2+传感器耦合。分子分析表明,这种紧密耦合是由涉及Ca 2+通道,Ca 2+传感器和各种其他突触蛋白的蛋白质-蛋白质相互作用产生的。纳米结构域偶联具有若干功能优势,因为它增加了突触传递的功效、速度和能量效率。
The physical distance between presynaptic Ca2+ channels and the Ca2+ sensors that trigger exocytosis of neurotransmitter-containing vesicles is a key determinant of the signalling properties of synapses in the nervous system. Recent functional analysis indicates that in some fast central synapses, transmitter release is triggered by a small number of Ca2+ channels that are coupled to Ca2+ sensors at the nanometre scale. Molecular analysis suggests that this tight coupling is generated by protein–protein interactions involving Ca2+ channels, Ca2+ sensors and various other synaptic proteins. Nanodomain coupling has several functional advantages, as it increases the efficacy, speed and energy efficiency of synaptic transmission.
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