2020年9月
Single-Molecule AFM Study of DNA Damage by O-1(2) Generated from Photoexcited C-60
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
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- 巻
- 11
- 号
- 18
- 開始ページ
- 7819
- 終了ページ
- 7826
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.jpclett.0c02257
- 出版者・発行元
- AMER CHEMICAL SOC
Light-induced oxidative damage of DNA by O-1(2) generated from photoexcited C-60 was observed at the single-molecule level by atomic force microscopy (AFM) imaging. Two types of DNA origami with uniform morphologies were immobilized on a mica surface and used as DNA substrates. Upon visible light irradiation (528 nm) in the presence of a C-60 aqueous solution, the morphology changes of DNA origami substrates were observed by time-lapse AFM imaging at the single-molecule level by tracking a discrete DNA molecule. The origami showed nicked and flattened morphologies with relaxed features caused by the covalent cleavage of the DNA strands. The involvement of O-1(2) in the on-surface DNA damage was clearly confirmed by AFM experiments in the presence of a O-1(2) quencher and ESR measurements with a spin-trapping agent for O-1(2). This study is the first example of single-molecule observation of oxidative damage of DNA by AFM with corresponding morphology changes in a photocontrolled and time-dependent manner by O-1(2) generated catalytically from photoexcited C-60.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.jpclett.0c02257
- ISSN : 1948-7185
- PubMed ID : 32830976
- Web of Science ID : WOS:000574906500049