Multireference approaches for excited states of molecules

H Lischka, D Nachtigallova, AJA Aquino… - Chemical …, 2018 - ACS Publications
Understanding the properties of electronically excited states is a challenging task that
becomes increasingly important for numerous applications in chemistry, molecular physics …

Theory and simulation of the ultrafast double-bond isomerization of biological chromophores

S Gozem, HL Luk, I Schapiro, M Olivucci - Chemical reviews, 2017 - ACS Publications
Ultrafast processes in light-absorbing proteins have been implicated in the primary step in
the light-to-energy conversion and the initialization of photoresponsive biological functions …

Toward automatic rhodopsin modeling as a tool for high-throughput computational photobiology

F Melaccio, M del Carmen Marín… - Journal of Chemical …, 2016 - ACS Publications
We report on a prototype protocol for the automatic and fast construction of congruous sets
of QM/MM models of rhodopsin-like photoreceptors and of their mutants. In the present …

Mapping the excited state potential energy surface of a retinal chromophore model with multireference and equation-of-motion coupled-cluster methods

S Gozem, F Melaccio, R Lindh, AI Krylov… - Journal of Chemical …, 2013 - ACS Publications
The photoisomerization of the retinal chromophore of visual pigments proceeds along a
complex reaction coordinate on a multidimensional surface that comprises a hydrogen-out …

Electrostatic control of photoisomerization in channelrhodopsin 2

R Liang, JK Yu, J Meisner, F Liu… - Journal of the American …, 2021 - ACS Publications
Channelrhodopsin 2 (ChR2) is the most commonly used tool in optogenetics. Because of its
faster photocycle compared to wild-type (WT) ChR2, the E123T mutant of ChR2 is a useful …

a-ARM: Automatic Rhodopsin Modeling with Chromophore Cavity Generation, Ionization State Selection, and External Counterion Placement

L Pedraza-González, L De Vico, MC Marı́n… - Journal of chemical …, 2019 - ACS Publications
The Automatic Rhodopsin Modeling (ARM) protocol has recently been proposed as a tool
for the fast and parallel generation of basic hybrid quantum mechanics/molecular mechanics …

Geometry optimization in polarizable QM/MM models: the induced dipole formulation

S Caprasecca, S Jurinovich, L Viani… - Journal of Chemical …, 2014 - ACS Publications
We present the mathematical derivation and the computational implementation of the
analytical geometry derivatives for a polarizable QM/MM model (QM/MMPol). In the adopted …

Mechanism of color and photoacidity tuning for the protonated green fluorescent protein chromophore

CY Lin, SG Boxer - Journal of the American Chemical Society, 2020 - ACS Publications
The neutral or A state of the green fluorescent protein (GFP) chromophore is a remarkable
example of a photoacid naturally embedded in the protein environment and accounts for the …

Insight into the isomerization mechanism of retinal proteins from hybrid quantum mechanics/molecular mechanics simulations

S Sen, RK Kar, VA Borin… - Wiley Interdisciplinary …, 2022 - Wiley Online Library
The photoisomerization of retinal is a unifying primary event in the rhodopsin protein family.
In vertebrate rhodopsins it is the first step in the vision process, while in the microbial …

Advances in understanding the molecular basis of the first steps in color vision

L Hofmann, K Palczewski - Progress in retinal and eye research, 2015 - Elsevier
Serving as one of our primary environmental inputs, vision is the most sophisticated sensory
system in humans. Here, we present recent findings derived from energetics, genetics and …