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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Chem+Theory+Comput
2016 ; 12
(9
): 4578-92
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Dissecting the Influence of Protein Flexibility on the Location and Thermodynamic
Profile of Explicit Water Molecules in Protein-Ligand Binding
#MMPMID27494046
Yang Y
; Lill MA
J Chem Theory Comput
2016[Sep]; 12
(9
): 4578-92
PMID27494046
show ga
Explicit water molecules in the binding site of proteins play a crucial role for
protein-ligand association. Recent advances in computer-aided drug discovery
methodology allow for an accurate prediction of the localized position and
thermodynamic profile of water molecules (i.e., hydration sites) in the binding
site. The underlying calculations are based on MD simulations of explicit water
molecules in a restrained protein structure. However, the ligand-binding process
is typically associated with protein conformational change that influences the
position and thermodynamic properties of the hydration site. In this manuscript,
we present the developments of two methods to incorporate the influence of
protein conformational change on hydration sites either by following the
conformational transition step-by-step (method I) or to match the hydration sites
of the two transition end states using local coordinate systems (method II).
Using these methods, we highlight the difference in the estimated protein
desolvation free energy with and without inclusion of protein flexibility. To the
best of our knowledge, this is the first study that explicitly studies the
influence of protein conformational change on the position and thermodynamic
profiles of water molecules and provides methodology to incorporate protein
flexibility into the estimation of the desolvation free energy.