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Plant and Cell Physiology, 2004, Vol. 45, No. 2 236-242
© 2004 Oxford University Press

Short Communication

Arabidopsis Dynamin-Like Protein 2a (ADL2a), Like ADL2b, is Involved in Plant Mitochondrial Division

Shin-ichi Arimura1, Gen Paul Aida, Masaru Fujimoto, Mikio Nakazono and Nobuhiro Tsutsumi

Laboratory of Plant Molecular Genetics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657 Japan

Abstract

The Arabidopsis genome has two similar dynamin-like proteins, ADL2a and ADL2b (76.7% identity). ADL2a is reported to be localized in chloroplasts [Kang et al. (1998) Plant Mol. Biol. 38: 437], while ADL2b functions in mitochondrial division [Arimura and Tsutsumi (2002) Proc. Natl. Acad. Sci. USA 99: 5727]. Using GFP fusion proteins, we observed both ADL2a and ADL2b in portions of mitochondria but not in chloroplasts. Furthermore, cells transformed with ADL2a and ADL2b with a defective GTPase domain had normal chloroplasts but elongated mitochondria. These results imply that both ADL2b and ADL2a are involved in the division of plant mitochondria.

Footnotes

1 Corresponding author: E-mail, arimura{at}mail.ecc.u-tokyo.ac.jp; Fax, +81-3-5841-5183.


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