The Charge Distribution on a Protein Surface Determines Whether Productive or Futile Encounter Complexes Are Formed.

ABSTRACT: Protein complex formation depends strongly on electrostatic interactions. The distribution of charges on the surface of redox proteins is often optimized by evolution to guide recognition and binding. To test the degree to which the electrostatic interactions between cytochrome c peroxidase (CcP) and cytochrome c (Cc) are optimized, we produced five CcP variants, each with a different charge distribution on the surface. Monte Carlo simulations show that the addition of negative charges attracts Cc to the new patches, and the neutralization of the charges in the regular, stereospecific binding site for Cc abolishes the electrostatic interactions in that region entirely. For CcP variants with the charges in the regular binding site intact, additional negative patches slightly e

SUBMITTER: Di Savino A 

PROVIDER: S-EPMC8041253 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature