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Laboratory of Food Quality Design and Developmen , Division of Agronomy and Horticultural Science , Graduate School of Agriculture, Kyoto University

Research

Mechanism of Seed Storage Protein Folding and Quality Control

Mechanism of Seed Storage Protein Folding and Quality Control

@Seed storage proteins synthesized in the rough endoplasmic reticulum in seed cells should be folded prior to transport to protein storage vacuoles. Identification and characterization of molecular chaperones and protein disulfide isomerase family members that assist in folding and quality control are ongoing.

Mechanism of Soybean Seed Protein Trafficking and Accumulation

Mechanism of Soybean Seed Protein Trafficking and Accumulation

@Most soybean storage proteins are transported to storage vacuoles from the endoplasmic reticulum via the Golgi. Such targeted transport is made possible by a transport-signal recognition system as well as the molecular association of storage proteins. We are trying to elucidate these mechanisms at a molecular level.

Soybean storage protein, with b-conglycinin (green) synthesized in the endoplasmic reticulum (red), accumulates in storage vacuoles.

Research on the Functions of Soybean and Wheat Proteins

Mechanism of Soybean Seed Protein Trafficking and Accumulation

@Proteins have a significant effect on food function. We are investigating the relationship between food function, protein structure, and protein-protein interactions.
@Wheat gliadins have been known to be insoluble prolamin proteins in water at neutral pH. We found that gliadins are soluble in water under certain conditions (left) and produce aggregates in the presence of salt (right).