Molecular cloning of curculin, a novel taste-modifying protein with a sweet taste

cDNA clones for curculin, a novel taste-modifying protein, were isolated and sequenced. The encoded prepro-curculin was composed of 158 amino acid residues including a signal sequence of 22 residues and a carboxy-terminal extension peptide of 22 residues. Northern blot analysis showed that the mRNA for curculin was first detected in Curculigo latifolia fruits at 2 weeks after pollination and remained at a constant level for the following 4 weeks.