Plant Myosins

  • Etsuo Yokota
  • Teruo Shimmen
Part of the Advances in Plant Biology book series (AIPB, volume 2)


Myosin, generally composed of motor, neck domains and tail region, is a molecular motor sliding along actin filaments with the hydrolysis of ATP. Three classes of myosin, VIII, XI and XIII, have been identified from plants. Biochemical and biophysical analyses using a native myosin XI and its functional recombinant motor domains showed mechnochemical properties in the motile activity and the regulatory mechanism. Most important is a finding that higher plant myosin XI is a processive motor. Live imaging approach within the cells, in which fluorescently labeled tail region is co-expressed with organelle marker proteins, revealed the function of this region in myosin VIII and myosin XI. In many cases, the tail region is involved in targeting these myosins to cargos, organelles and vesicles, and to proper location in plant cells. Furthermore, the mechanisms of organelle binding and recognition of myosin XI tail regions become evident. Recently, the streaming endoplasmic reticulum was indicated to contribute not only to the cytoplasmic streaming, but also to the organization of actin bundles within the cytoplasm in Arabidopsis.


Pollen Tube Actin Filament Cytoplasmic Streaming Actin Bundle Myosin Versus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Life Science, Graduate School of Life ScienceUniversity of HyogoHarima Science Park CityJapan

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