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Title: Development of ultrafast camera-based single fluorescent-molecule imaging for cell biology
Authors: Fujiwara, Takahiro K.
Takeuchi, Shinji
Kalay, Ziya
Nagai, Yosuke
Tsunoyama, Taka A.
Kalkbrenner, Thomas
Iwasawa, Kokoro
Ritchie, Ken P.
Suzuki, Kenichi G.N.
Kusumi, Akihiro
Author's alias: 藤原, 敬宏
竹内, 信司
角山, 貴昭
岩沢, こころ
鈴木, 健一
楠見, 明弘
Keywords: Biophysics
Membrane and lipid biology
Issue Date: 7-Aug-2023
Publisher: Rockefeller University Press
Journal title: Journal of Cell Biology
Volume: 222
Issue: 8
Thesis number: e202110160
Abstract: The spatial resolution of fluorescence microscopy has recently been greatly enhanced. However, improvements in temporal resolution have been limited, despite their importance for examining living cells. Here, we developed an ultrafast camera system that enables the highest time resolutions in single fluorescent-molecule imaging to date, which were photon-limited by fluorophore photophysics: 33 and 100 µs with single-molecule localization precisions of 34 and 20 nm, respectively, for Cy3, the optimal fluorophore we identified. Using theoretical frameworks developed for the analysis of single-molecule trajectories in the plasma membrane (PM), this camera successfully detected fast hop diffusion of membrane molecules in the PM, previously detectable only in the apical PM using less preferable 40-nm gold probes, thus helping to elucidate the principles governing the PM organization and molecular dynamics. Furthermore, as described in the companion paper, this camera allows simultaneous data acquisitions for PALM/dSTORM at as fast as 1 kHz, with 29/19 nm localization precisions in the 640 × 640 pixel view-field.
Description: 細胞膜上の分子がバレエの群舞のように見えてきた: 1蛍光分子の感度で、究極速度で撮像できるカメラを開発. 京都大学プレスリリース. 2023-06-06.
Rights: © 2023 Fujiwara et al.
This article is available under a Creative Commons License (Attribution 4.0 International, as described at https://creativecommons.org/licenses/by/4.0/).
URI: http://hdl.handle.net/2433/283283
DOI(Published Version): 10.1083/jcb.202110160
PubMed ID: 37278763
Related Link: https://www.icems.kyoto-u.ac.jp/news/8175/
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