Disulfide bonds play a critical stabilizing role in many protein structures by forming cross-links between different regions of polypeptide chains.

How disulfide bonds affect protein stability?

Classical theory suggests that disulfide bonds stabilize proteins by reducing the entropy of the denatured state. More recent theories have attempted to expand this idea, suggesting that in addition to configurational entropic effects, enthalpic and native-state effects occur and cannot be neglected.

What do disulfide bonds do in proteins?

Disulfide bonds stabilize protein structure by organizing and destabilizing the denatured protein relative to the native structure.