| 摘要 |
<p>A novel polypeptide having a cold-resistant pyruvate phosphate dikinase activity; a cloned DNA coding for the polypeptide; and a recombinant vector containing the DNA, each as a means for imparting cold resistance to plants. The polypeptide is either the following polypeptide (1) or polypeptide (2) and has such an amino acid sequence that at least one amino acid residue present in the region having a length of one-sixth of the whole length starting with the C-terminus has been replaced by another amino acid residue and also has a cold-resistant pyruvate phosphate dikinase activity: 1) a polypeptide having an amino acid sequence represented by any of the SEQ ID no:1 to no:4 in the sequence listing and also having a pyruvate phosphate dikinase activity; and 2) a polypeptide having such an amino acid sequence that at least 50 % thereof is homologous with the amino acid sequence mentioned in item 1) and also having a pyruvate phosphate dikinase activity.</p> |
