Spontaneous Structural Changes in Actin Regulate G-F Transformation

Masatoshi Morimatsu, Yuichi Togashi, So Nishikawa, Mitsuhiro Sugawa, Atsuko H. Iwane, Toshio Yanagida

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Transformations between G- (monomeric) and F-actin (polymeric) are important in cellular behaviors such as migration, cytokinesis, and morphing. In order to understand these transitions, we combined single-molecule Förster resonance energy transfer with total internal reflection fluorescence microscopy to examine conformational changes of individual actin protomers. We found that the protomers can take different conformational states and that the transition interval is in the range of hundreds of seconds. The distribution of these states was dependent on the environment, suggesting that actin undergoes spontaneous structural changes that accommodate itself to polymerization.

Original languageEnglish
Article numbere45864
JournalPloS one
Issue number11
Publication statusPublished - Nov 5 2012
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General


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