Application of quantum mechanics/molecular mechanics methods in the study of enzymatic reaction mechanisms

SF Sousa, AJM Ribeiro, RPP Neves… - Wiley …, 2017 - Wiley Online Library
Quantum mechanics/molecular mechanics (QM/MM) methods offer a very appealing option
for the computational study of enzymatic reaction mechanisms, by separating the problem …

Anthocyanins as antidiabetic agents—in vitro and in silico approaches of preventive and therapeutic effects

H Oliveira, A Fernandes, N F. Brás, N Mateus… - Molecules, 2020 - mdpi.com
Many efforts have been made in the past two decades into the search for novel natural and
less-toxic anti-diabetic agents. Some clinical trials have assigned this ability to …

Correlating enzymatic reactivity for different substrates using transferable data-driven collective variables

S Das, U Raucci, RPP Neves, MJ Ramos… - Proceedings of the …, 2024 - pnas.org
Machine learning (ML) is transforming the investigation of complex biological processes. In
enzymatic catalysis, one significant challenge is identifying the reactive conformations (RC) …

In vivo challenges of anti-diabetic peptide therapeutics: Gastrointestinal stability, toxicity and allergenicity

PG Yap, CY Gan - Trends in Food Science & Technology, 2020 - Elsevier
Background A plethora of research has explored the potential of bioactive peptide as a new
class of drug therapeutics, yet only a minute amount has successfully translated into clinical …

How and when does an enzyme react? Unraveling α-Amylase catalytic activity with enhanced sampling techniques

S Das, U Raucci, RPP Neves, MJ Ramos… - ACS …, 2023 - ACS Publications
Enzymatic catalysis is a complex process that can involve multiple conformations of the
enzyme: substrate complex and several competitive reaction pathways, resulting in a multi …

Role of enzyme and active site conformational dynamics in the catalysis by α-amylase explored with QM/MM molecular dynamics

RPP Neves, PA Fernandes… - Journal of Chemical …, 2022 - ACS Publications
We assessed enzyme: substrate conformational dynamics and the rate-limiting glycosylation
step of a human pancreatic α-amylase: maltopentose complex. Microsecond molecular …

Computer simulations explain the anomalous temperature optimum in a cold-adapted enzyme

J Sočan, M Purg, J Åqvist - Nature communications, 2020 - nature.com
Cold-adapted enzymes from psychrophilic species show the general characteristics of being
more heat labile, and having a different balance between enthalpic and entropic …

Kinetic View of Enzyme Catalysis from Enhanced Sampling QM/MM Simulations

D Ray, S Das, U Raucci - Journal of Chemical Information and …, 2024 - ACS Publications
The rate constants of enzyme-catalyzed reactions (k cat) are often approximated from the
barrier height of the reactive step. We introduce an enhanced sampling QM/MM approach …

Modulating the digestibility of cassava starch by esterification with phenolic acids

T Xu, Y Zhong, Q Chen, L Wu, S Ji, B Yang, Y Zhang… - Food …, 2022 - Elsevier
This study applied ferulic acid, sinapic acid, and p-coumaric acid to synthesise esters with
cassava starch and investigated their digestibility, GI and starch structure alterations. Starch …

Hidden conformational states and strange temperature optima in enzyme catalysis

J Åqvist, J Sočan, M Purg - Biochemistry, 2020 - ACS Publications
The existence of temperature optima in enzyme catalysis that occur before protein melting
sets in can be described by different types of kinetic models. Such optima cause distinctly …