TLS Online TPP Program

#Question id: 878


Can a peptide bind more strongly to an unfolded than the same protein in a folded state?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. It will depend on the balance of favourable interactions (enthalpy) versus loss in conformational entropy. For the folded protein, the loss in conformational entropy is less upon binding.

  2. If the increased interactions for the unfolded protein can less than compensate the increased loss in conformational entropy then the net Gibbs free energy will be favourable.

  3. The unfolding do not cause the the appearance of hydrophobic sites of the surface of protein, so if the interaction of the peptide with the protein is depending on the hydrophobic site.

  4. If the binding site changed due to unfolding the binding will be stronger.