Single-molecule nanometry for biological physics.

Single-molecule nanometry for biological physics.
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DOI:
10.1088/0034-4885/76/1/016601
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发表时间:
2013-01
期刊:
Reports on progress in physics. Physical Society (Great Britain)
影响因子:
--
通讯作者:
Ha T
Ha T
中科院分区:
其他
文献类型:
--
作者:
Kim H;Ha T

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精确测量是物理学的一个标志,但基本生物成分的小长度尺度(~纳米)和它们周围的热波动挑战了我们可视化它们的能力。在这里,我们强调了单分子纳米测量的最新发展,其中单个荧光分子的位置可以以纳米精度确定,达到散粒噪声施加的极限,并且两个分子之间的相对运动可以以~ 0.3 nm的精度以~ 1毫秒的时间分辨率确定,以及这些新工具是如何提供关于马达蛋白如何在细胞高速公路上移动的基本见解。我们还将讨论三个和四个荧光分子之间的相互作用如何分别用于测量三个和六个坐标,使我们能够关联多个组件的运动。最后,我们将讨论最近的进展,结合埃精密光镊与单分子荧光检测,打开新的窗口,多维单分子纳米生物物理学。
Precision measurement is a hallmark of physics but the small length scale (~ nanometer) of elementary biological components and thermal fluctuations surrounding them challenge our ability to visualize their action. Here, we highlight the recent developments in single molecule nanometry where the position of a single fluorescent molecule can be determined with nanometer precision, reaching the limit imposed by the shot noise, and the relative motion between two molecules can be determined with ~ 0.3 nm precision at ~ 1 millisecond time resolution, and how these new tools are providing fundamental insights on how motor proteins move on cellular highways. We will also discuss how interactions between three and four fluorescent molecules can be used to measure three and six coordinates, respectively, allowing us to correlate movements of multiple components. Finally, we will discuss recent progress in combining angstrom precision optical tweezers with single molecule fluorescent detection, opening new windows for multi-dimensional single molecule nanometry for biological physics.
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