Pressure-Enhanced Enzymes Application Notes

Pressure-Enhanced Enzymes Application Notes

Display:

Introduction

The goal of the current Application Note is to provide the best set of starting conditions for high pressure-enhanced Lys-C digestion of disulfide-intact IgG. These conditions are likely to be similar for digestion of other hard-to-digest proteins, such as those containing hydrophobic transmembrane domains. The current application focuses on digestion at constant high pressure (not pressure cycling) in the HUB880 Explorer.

Introduction
Pressure-enhanced proteolytic digestion exploits the ability of high hydrostatic pressure to promote protein denaturation and the access of proteolytic enzymes to their target sites. Pressure denaturation is fundamentally different from thermal denaturation as it occurs by virtue of hydration of hydrophobic residues and by water saturation of protein substrate cavities normally inaccessible to solvent. Pressure denaturation is more efficient for hydrophobic proteins, while some hydrophilic soluble proteins are reported to retain relatively compact conformation, even when saturated by water molecules [1-6].