Engineering and characterization of an enhanced fluorescent protein voltage sensor.

Engineering and characterization of an enhanced fluorescent protein voltage sensor.
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DOI:
10.1371/journal.pone.0000440
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发表时间:
2007-05-09
期刊:
影响因子:
3.7
通讯作者:
Knöpfel T
Knöpfel T
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Dimitrov D;He Y;Mutoh H;Baker BJ;Cohen L;Akemann W;Knöpfel T

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荧光蛋白已被用于产生各种生物传感器,以光学监测活细胞中的生物现象。在这类基因编码的生物传感器中,膜电位的报告者一直是一个特别的挑战。目前已知的电压传感器蛋白的使用受到不正确的亚细胞定位和哺乳动物细胞中小的或不存在的电压响应的限制。在这里,我们报告的荧光蛋白电压传感器具有上级针对哺乳动物质膜和高响应性的膜电位信号在兴奋细胞。这种生物传感器,我们称之为VSFP2.1,可能会导致新的方法,监测电活性细胞与细胞类型特异性,非侵入性和大量,同时。
Fluorescent proteins have been used to generate a variety of biosensors to optically monitor biological phenomena in living cells. Among this class of genetically encoded biosensors, reporters for membrane potential have been a particular challenge. The use of presently known voltage sensor proteins is limited by incorrect subcellular localization and small or absent voltage responses in mammalian cells. Here we report on a fluorescent protein voltage sensor with superior targeting to the mammalian plasma membrane and high responsiveness to membrane potential signaling in excitable cells. This biosensor, which we termed VSFP2.1, is likely to lead to new methods of monitoring electrically active cells with cell type specificity, non-invasively and in large numbers, simultaneously.
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