Torque-speed curve of the Na+-driven flagellar motor of vibrio alginolyticus

Akihiko Ishijima, Yoshiyuki Sowa

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

The torque-speed relationship of the Na+-driven flagellar motor of Vibrio alginolyticus was investigated. The rotation rate of the motor was measured by following the position of a bead, attached to a flagellar filament, using optical nanometry. In the presence of 50 mM NaCl, the generated torque was relatively constant (∼3800 pN nm) at lower speeds (speeds up to ∼300 Hz) and then decreased steeply, similar to the H+-driven flagellar motor of E. coli. When the external NaCl concentration was varied, the generated torque of the flagellar motor was changed over a wide range of speeds. This result could be reproduced using a simple kinetic model, which takes into consideration the association and dissociation of Na+ onto the motor. These results imply that for a complete understanding of the mechanism of flagellar rotation it is essential to consider both the electrochemical gradient and the absolute concentration of the coupling ion.

本文言語English
ホスト出版物のタイトル2005 5th IEEE Conference on Nanotechnology
出版社IEEE Computer Society
ページ468-469
ページ数2
ISBN(印刷版)0780391993, 9780780391994
DOI
出版ステータスPublished - 2005
イベント2005 5th IEEE Conference on Nanotechnology - Nagoya, Japan
継続期間: 2005 7月 112005 7月 15

出版物シリーズ

名前2005 5th IEEE Conference on Nanotechnology
2

Other

Other2005 5th IEEE Conference on Nanotechnology
国/地域Japan
CityNagoya
Period05/7/1105/7/15

ASJC Scopus subject areas

  • 工学(全般)

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