Localization atomic force microscopy.

Localization atomic force microscopy.
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定位原子力显微镜。

DOI:
10.1038/s41586-021-03551-x
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发表时间:
2021-06
期刊:
影响因子:
64.8
通讯作者:
Scheuring S
Scheuring S
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Heath GR;Kots E;Robertson JL;Lansky S;Khelashvili G;Weinstein H;Scheuring S

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Understanding structural dynamics of biomolecules at the single molecule level is vital to advancing our knowledge of molecular mechanisms. Currently, there are few techniques that can capture dynamics at the sub-nanometer scale and in physiologically relevant conditions. Atomic force microscopy (AFM) has the notable advantage of analyzing unlabeled single molecules in physiological buffer and at ambient temperature and pressure, yet its resolution has been limiting to assess conformational details of biomolecules. To move beyond current resolution limitations, we developed Localization AFM (LAFM). By applying localization image reconstruction algorithms to peak positions in high-speed AFM and conventional AFM data, we increase the resolution beyond the limits set by the tip radius and resolve single amino acid residues on soft protein surfaces in native and dynamic conditions. The LAFM method allows the calculation of high-resolution maps from either images of many molecules or many images of a single molecule acquired over time, opening new avenues for single molecule structural analysis. LAFM is a post-acquisition image reconstruction method that can be applied to any biomolecular AFM dataset.
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