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Journal of Experimental Botany, Vol. 52, No. 357, pp. 877-879, April 15, 2001
© 2001 Oxford University Press

Gene Notes

A novel Coptis japonica multidrug-resistant protein preferentially expressed in the alkaloid-accumulating rhizome1

Kazufumi Yazaki2, Nobukazu Shitan2, Hiromi Takamatsu2, Kazumitsu Ueda3 and Fumihiko Sato2,4

2 Laboratory of Molecular and Cellular Biology of Totipotency, Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kitashirakawa, Kyoto 606-8502, Japan
3 Laboratory of Biochemistry, Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan

Abstract

A full-length cDNA, Cjmdr1, which belongs to the multidrug-resistant (mdr) gene family, was isolated by nested RT-PCR from alkaloid-producing cultured cells of Coptis japonica. The cDNA is 4192 nucleotides long and has an ORF of 1289 amino acids. Northern analysis of the intact plant showed a clear preference in its expression in the rhizome, where alkaloids are highly accumulated compared to other organs.

Key words: ABC protein, mdr, rhizome-specific expression, Coptis japonica.


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