JXB Advance Access published online on August 13, 2008
Journal of Experimental Botany, doi:10.1093/jxb/ern202
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© 2008 The Author(s).
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)
RESEARCH PAPER |
An isoform of Arabidopsis myosin XI interacts with small GTPases in its C-terminal tail region
1Department of Life Science, Graduate School of Life Science, University of Hyogo, Harima Science Park City, Hyogo 678-1279, Japan
2RIKEN Plant Science Center, 1-7-22 Suehiro-cho Turumi-ku, Yokohama, Kanagawa 230-0045, Japan
3Department of Cell Biology, National Institute for Basic Biology, Okazaki 444-8585, Japan
4Graduate School of Human Environmental Sciences, Kyoto Prefectural University, Nakaragi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
* To whom correspondence should be addressed: E-mail: yokota{at}sci.u-hyogo.ac.jp
Myosin XI, a class of myosins expressed in plants is believed to be responsible for cytoplasmic streaming and the translocation of organelles and vesicles. To gain further insight into the translocation of organelles and vesicles by myosin XI, an isoform of Arabidopsis myosin XI, MYA2, was chosen and its role in peroxisome targeting was examined. Using the yeast two-hybrid screening method, two small GTPases, AtRabD1 and AtRabC2a, were identified as factors that interact with the C-terminal tail region of MYA2. Both recombinant AtRabs tagged with His bound to the recombinant C-terminal tail region of MYA2 tagged with GST in a GTP-dependent manner. Furthermore, AtRabC2a was localized on peroxisomes, when its CFP-tagged form was expressed transiently in protoplasts prepared from Arabidopsis leaf tissue. It is suggested that MYA2 targets the peroxisome through an interaction with AtRabC2a.
Key words: AtRabC2a, AtRabD1, myosin XI, MYA2, peroxisome
Received 6 March 2008; Revised 7 July 2008 Accepted 8 July 2008
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