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MBE Advance Access originally published online on June 23, 2004
Molecular Biology and Evolution 2004 21(10):1855-1870; doi:10.1093/molbev/msh197
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Molecular Biology and Evolution vol. 21 no. 10 © Society for Molecular Biology and Evolution 2004; all rights reserved.

Research Article

Comparative Analysis of Plant and Animal Calcium Signal Transduction Element Using Plant Full-Length cDNA Data

Toshifumi Nagata*, Shigemi Iizumi*, Kouji Satoh*, Hisako Ooka*, Jun Kawai{dagger}, Piero Carninci{dagger}, Yoshihide Hayashizaki{dagger}, Yasuhiro Otomo{ddagger}, Kazuo Murakami{ddagger}, Kenichi Matsubara{ddagger} and Shoshi Kikuchi*

* Department of Molecular Genetics, National Institute of Agrobiological Sciences, 2-1-2 Kannon dai, Tsukuba, Ibaraki, 305-8602 Japan; {dagger} RIKEN Institute, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045 Japan; and {ddagger} Foundation for Advancement of International Science; 586-9 Akatsuka-Ushigafuchi, Tsukuba, Ibaraki, 305-0062 Japan

E-mail: skikuchi{at}nias.affrc.go.jp.

We obtained 32K full-length cDNA sequence data from the rice full-length cDNA project and performed a homology search against NCBI GenBank data. We have also searched homologs of Arabidopsis and other plants' genes with the databases. Comparative analysis of calcium ion transport proteins revealed that the genes specific for muscle and nerve calcium signal transduction systems (VDCC, IP3 receptor, ryanodine receptor) are very different in animals and plants. In contrast, Ca elements with basic functions in cell responses (CNGC, iGlu receptor, Ca2+ATPase, Ca2+/Na+ -K+ ion exchanger) are basically conserved between plants and animals. We also performed comparative analyses of calcium ion binding and/or controlling signal transduction proteins. Many genes specific for muscle and nerve tissue do not exist in plants. However, calcium ion signal transduction genes of basic functions of cell homeostasis and responses were well conserved; plants have developed a calcium ion interacting system that is more direct than in animals. Many species of plants have specifically modified calcium ion binding proteins (CPK, CRK), Ca2+/phospholipid-binding domains, and calcium storage proteins.

Key Words: calcium transport protein • calcium-binding protein • full-length cDNA


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