Nonlinear Elasticity and an 8-nm Working Stroke of Single Myosin Molecules in Myofilaments

Author:

Kaya Motoshi1,Higuchi Hideo1

Affiliation:

1. Department of Physics, Graduate School of Science, University of Tokyo, 7-3-1 Hongo Bunkyou-ku Tokyo, 113-0033 Japan.

Abstract

Measuring Single Myosins at Work In the past 15 years, the molecular mechanism of muscle contraction has been investigated at the single-molecule level; however, results have varied between laboratories because of the nonprocessive properties of skeletal myosin. Now, Kaya and Higuchi (p. 686 ) have measured the nonlinear elasticity and working stroke size of single skeletal myosins by combining optical trapping and fluorescence imaging with subnanometer accuracy. The data suggest that it is important to relate myosin's internal structural changes to physiological force generation and filament sliding.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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