Optical imaging of individual biomolecules in densely packed clusters.
Optical imaging of individual biomolecules in densely packed clusters.
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DOI:
10.1038/nnano.2016.95
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发表时间:
2016-09
影响因子:
38.3
通讯作者:
中科院分区:
文献类型:
--
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Recent advances in fluorescence super-resolution microscopy have allowed sub-cellular features and synthetic nanostructures down to ~15 nm in size to be imaged. However, direct optical observation of individual molecular targets (~5 nm) in a densely packed biomolecular cluster remains a challenge. Here, we show that such discrete molecular imaging is possible using DNA-PAINT (points accumulation for imaging in nanoscale topography) - a super-resolution fluorescence microscopy technique that exploits programmable transient oligonucleotide hybridisation - on synthetic DNA nanostructures. We examined the effects of high photon count, high blinking statistics, and appropriate blinking duty cycle on imaging quality, and developed a software-based drift correction method that achieves <1 nm residual drift (r.m.s.) over hours. This allowed us to image a densely packed triangular lattice pattern with ~5 nm point-to-point distance, and analyse DNA origami structural offset with angstrom-level precision (2 Å) from single-molecule studies. By combining the approach with multiplexed Exchange-PAINT imaging, we further demonstrated an optical nano-display with 5×5 nm pixel size and three distinct colours, and with <1 nm cross-channel registration accuracy. This method opens up possibilities for direct and quantitative optical observation of individual biomolecular features in crowded environments.
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影响因子:
48
作者:
Dempsey, Graham T.;Vaughan, Joshua C.;Chen, Kok Hao;Bates, Mark;Zhuang, Xiaowei
通讯作者:
Zhuang, Xiaowei
影响因子:
3.6
作者:
Klar, TA;Hell, SW
通讯作者:
Hell, SW
影响因子:
64.5
作者:
Alushin GM;Lander GC;Kellogg EH;Zhang R;Baker D;Nogales E
通讯作者:
Nogales E
影响因子:
10.8
作者:
Johnson-Buck A;Nangreave J;Kim DN;Bathe M;Yan H;Walter NG
通讯作者:
Walter NG
影响因子:
64.8
作者:
Rothemund, PWK
通讯作者:
Rothemund, PWK