[Trypsin inhibitor from buckwheat seeds]

Area of Science:

• Biochemistry
• Plant Science

Context:

• Protease inhibitors are crucial in regulating enzyme activity.
• Plant-derived inhibitors offer potential for various applications.

Purpose:

• To isolate and characterize a proteinaceous inhibitor from buckwheat seeds.
• To determine the inhibitor's specificity against serine proteases.

Summary:

• A novel inhibitor was isolated from buckwheat seeds using sequential extraction, fractionation, precipitation, and chromatography techniques.
• Electrophoresis confirmed the inhibitor's homogeneity, with a molecular weight of ~10 kDa, pI of 5.8, and sedimentation coefficient of 1S.
• The inhibitor demonstrated potent inhibition of trypsin and moderate inhibition of chymotrypsin, with no activity against buckwheat seed BAPAase.

Impact:

• Provides a detailed biochemical profile of a buckwheat-derived protease inhibitor.
• Highlights the potential of buckwheat as a source for specific protease inhibitors.