Quantitative first principles calculations of protein circular dichroism in the near-ultraviolet.

ABSTRACT: Vibrational structure in the near-UV circular dichroism (CD) spectra of proteins is an important source of information on protein conformation and can be exploited to study structure and folding. A fully quantitative theory of the relationship between protein conformation and optical spectroscopy would facilitate deeper interpretation of and insight into biophysical and simulation studies of protein dynamics and folding. We have developed new models of the aromatic side chain chromophores toluene, p-cresol and 3-methylindole, which incorporate ab initio calculations of the Franck-Condon effect into first principles calculations of CD using an exciton approach. The near-UV CD spectra of 40 proteins are calculated with the new parameter set and the correlation between the compu

SUBMITTER: Li Z 

PROVIDER: S-EPMC5637123 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature