[Conformational changes during proteinase inhibitor proteins interaction with chymotrypsin]

Area of Science:

• Biochemistry
• Molecular Biology
• Protein Chemistry

Context:

• Chymotrypsin is a key digestive enzyme.
• Plant-derived protein inhibitors are crucial for regulating enzyme activity.
• Understanding enzyme-inhibitor interactions is vital for drug development.

Purpose:

• To investigate the complex formation between chymotrypsin and plant protein inhibitors.
• To analyze structural changes in inhibitors upon binding to chymotrypsin using CD-spectroscopy and fluorescence.
• To elucidate the mechanism of inhibition by plant-derived molecules.

Summary:

• CD-spectroscopy and fluorescence techniques were employed to study chymotrypsin complex formation with pea seed and potato tuber inhibitors.
• Complexation with potato tuber inhibitor induced conformational changes, evidenced by CD spectra and ANS fluorescence.
• Pea seed inhibitor binding altered the environment of disulfide bonds, as indicated by CD spectral shifts.

Impact:

• Provides insights into the molecular mechanisms of plant-based enzyme inhibition.
• Contributes to understanding protein-protein interactions in biological systems.
• Potential applications in developing novel therapeutic agents targeting proteases.