Stepping rotation of F1-ATPase visualized through angle-resolved single-fluorophore imaging

Kengo Adachi, Ryohei Yasuda, Hiroyuki Noji, Hiroyasu Itoh, Yoshie Harada, Masasuke Yoshida, Kazuhiko Kinosita

研究成果: Article

172 引用 (Scopus)

抜粋

Orientation dependence of single-fluorophore intensity was exploited in order to videotape conformational changes in a protein machine in real time. The fluorophore Cy3 attached to the central subunit of F1-ATPase revealed that the subunit rotates in the molecule in discrete 120°steps and that each step is driven by the hydrolysis of one ATP molecule. These results, unlike those from the previous study under a frictional load, show that the 120° stepping is a genuine property of this molecular motor. The data also show that the rate of ATP binding is insensitive to the load exerted on the rotor subunit.

元の言語English
ページ(範囲)7243-7247
ページ数5
ジャーナルProceedings of the National Academy of Sciences of the United States of America
97
発行部数13
DOI
出版物ステータスPublished - 2000 6 20
外部発表Yes

ASJC Scopus subject areas

  • General
  • Genetics

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