Oxidative Folding
Oxidative Folding — The process of forming native disulfide bonds in a peptide while simultaneously achieving the correct three-dimensional fold.
What Is Oxidative Folding?
Oxidative folding is the simultaneous formation of disulfide bonds and native conformation from a fully reduced, unfolded peptide. The process requires an oxidizing environment (air, DMSO, or GSH/GSSG redox buffer) and produces a distribution of disulfide isomers, from which the thermodynamically stable native isomer must be isolated.
Strategies
- Air oxidation: Simplest. Dilute peptide (0.01-0.1 mM) at pH 7-8. Slow (hours to days)
- GSH/GSSG: Redox buffer enables disulfide shuffling to reach thermodynamic minimum
- DMSO: 10-20% DMSO in water oxidizes thiols quickly. Good for single-disulfide peptides
- Regioselective: Orthogonal Cys protection enables sequential, directed disulfide formation
Frequently Asked Questions
What is Oxidative Folding?
The process of forming native disulfide bonds in a peptide while simultaneously achieving the correct three-dimensional fold.
Why is Oxidative Folding important in peptide research?
Oxidative Folding is a fundamental concept in biochemistry as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.
Authority Sources
- Oxidative Folding on Wikipedia
- Search Oxidative Folding on PubChem (NIH)
- Research articles on ScienceDirect