Comparative molecular biological analysis of Membrane Transporter genes from full-length cDNA data of rice

Abstract

We have collected and completely sequenced 32,127 full-length cDNA clones from japonica rice and homology search was made against NCBI Genbank data. We have focused the existences of known membrane transporter genes in plant and animal. The animal especially developed the channel system (Bcl-2, Connexin, E-ClC, LIC, VIC, etc,.) for rapid transmitting in nerve and muscle tissues and Na⁺ gradient dependent secondary transport system (NSS, SSS, etc,.). On the other hands, the pump system (P-type ATPase, ABC, etc,.) and the secondary transport genes (CPA2, DMT, MFS, MOP, POT, etc,.) using H⁺ as a co-transporter is diverged in plants. We have also compared the numbers of membrane transporter genes in Arabidopsis and rice. Between rice and Arabidopsis, many transporter genes are similar, however, in detail, diversity in the Multi antimicrobial extrusion (MATE), P type ATPase, VIC, monovalent cation: proton antiporter-2 (CPA2), and Carbohydrate transporter (NST, TPT etc,.) were changed.