QM/MM Investigation of the Spectroscopic Properties of the Fluorophore of Bacterial Luciferase.
J Chem Theory Comput
; 17(2): 605-613, 2021 Feb 09.
Article
em En
| MEDLINE
| ID: mdl-33449693
ABSTRACT
We employ replica-exchange molecular dynamics (REMD) and a hybrid ab initio multiconfigurational quantum mechanics/molecular mechanics (QM/MM) approach to model the absorption and fluorescence properties of bacterial luciferin-luciferase. Specifically, we employ complete active space perturbation theory (CASPT2) and study the effect of active space, basis set, and IPEA shift on the computed energies. We discuss the effect of the protein environment on the fluorophore's excited-state potential energy surface and the role that the protein plays in enhancing the fluorescence quantum yield in bacterial bioluminescence.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Teoria Quântica
/
Análise Espectral
/
Luciferases Bacterianas
/
Corantes Fluorescentes
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article