Bioscience, Biotechnology, and Biochemistry
Online ISSN : 1347-6947
Print ISSN : 0916-8451
Biochemistry & Molecular Biology Regular Papers
Four Rice Genes Encoding NADP Malic Enzyme Exhibit Distinct Expression Profiles
Wei CHIJianghua YANGNaihu WUFang ZHANG
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2004 Volume 68 Issue 9 Pages 1865-1874

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Abstract

In plants, the NADP malic enzymes (NADP-MEs) are encoded by small gene families. These NADP-ME gene families are relatively well described in C4 plants but not well studied in C3 plants. In this study, we investigated the NADP-ME gene family in a model C3 monocot plant (rice, Oryza sativa) based on its recently released genomic DNA sequence. We found that the rice NADP-ME family is composed of four members, one plastidic NADP-ME and three cytosolic versions. Although the rice NADP-ME genes identified share a high degree of similarity with one another, one cytosolic NADP-ME (OscytME3) contains several unique amino acid substitutions within highly conserved amino acid regions. Phylogenetic analysis showed that OscytME3 might be derived from a different evolutionary branch than the other three rice genes. Expression analysis of the four rice NADP-ME genes indicated that each had a different tissue-specific and developmental profile, although all four responded to stress stimuli.

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© 2004 by Japan Society for Bioscience, Biotechnology, and Agrochemistry
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