Abstract: A cDNA encoding IPA1 was isolated from Nipponbare by RT-PCR, sequencing results showed that the sequence consists of 1 257 bp with a complete CDS and encodes a protein of 418 amino acids. In addition, the prediction results indicated that molecular weight of target protein was 42.51 kD and theoretical isoelectric point was 9.37. The plant expression vector was constructed by ligating the cDNA fragment into expression vector pHI, then the recombinant plasmid pHI-IPA1 was confirmed by restriction enzyme digestion analysis with SmaI、SacI, and further verified by DNA sequencing. Vector plasmid was transformed into Agrobacterium tumefaciens, which will lay foundation for rice genetic transformation.