Ko Sugawara
University of Tokyo
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Publication
Featured researches published by Ko Sugawara.
Nature Chemistry | 2014
Shin Nosuke Uno; Mako Kamiya; Toshitada Yoshihara; Ko Sugawara; Kohki Okabe; Mehmet C. Tarhan; Hiroyuki Fujita; Takashi Funatsu; Yasushi Okada; Seiji Tobita; Yasuteru Urano
Single-molecule localization microscopy is used to construct super-resolution images, but generally requires prior intense laser irradiation and in some cases additives, such as thiols, to induce on-off switching of fluorophores. These requirements limit the potential applications of this methodology. Here, we report a first-in-class spontaneously blinking fluorophore based on an intramolecular spirocyclization reaction. Optimization of the intramolecular nucleophile and rhodamine-based fluorophore (electrophile) provide a suitable lifetime for the fluorescent open form, and equilibrium between the open form and the non-fluorescent closed form. We show that this spontaneously blinking fluorophore is suitable for single-molecule localization microscopy imaging deep inside cells and for tracking the motion of structures in living cells. We further demonstrate the advantages of this fluorophore over existing methodologies by applying it to nuclear pore structures located far above the coverslip with a spinning-disk confocal microscope and for repetitive time-lapse super-resolution imaging of microtubules in live cells for up to 1 h.
The Japanese Biochemical Society/The Molecular Biology Society of Japan | 2017
Ryoko Takata; Kohki Okabe; Ko Sugawara; Takashi Funatsu
Biophysical Journal | 2016
Ko Sugawara; Kohki Okabe; Takashi Funatsu
Biophysical Journal | 2015
Ko Sugawara; Kohki Okabe; Takashi Funatsu
生物物理 | 2014
Ko Sugawara; Kohki Okabe; Takashi Funatsu
Seibutsu Butsuri | 2014
Ko Sugawara; Kohki Okabe; Takashi Funatsu
Drug Delivery System | 2014
Ko Sugawara; Kohki Okabe; Takashi Funatsu
Biophysical Journal | 2014
Ko Sugawara; Kohki Okabe; Akihiko Sakamoto; Takashi Funatsu
生物物理 | 2013
Ko Sugawara; Kohki Okabe; Akihiko Sakamoto; Takashi Funatsu
Seibutsu Butsuri | 2013
Ko Sugawara; Kohki Okabe; Akihiko Sakamoto; Takashi Funatsu