Polyproline II helix is the preferred conformation for unfolded polyalanine in water

M Mezei, PJ Fleming, R Srinivasan… - … Structure, Function, and …, 2004 - Wiley Online Library
Does aqueous solvent discriminate among peptide conformers? To address this question,
we computed the solvation free energy of a blocked, 12‐residue polyalanyl‐peptide in …

A novel method reveals that solvent water favors polyproline II over β‐strand conformation in peptides and unfolded proteins: Conditional hydrophobic accessible …

PJ Fleming, NC Fitzkee, M Mezei, R Srinivasan… - Protein …, 2005 - Wiley Online Library
In aqueous solution, the ensemble of conformations sampled by peptides and unfolded
proteins is largely determined by their interaction with water. It has been a long‐standing …

Molecular dynamics simulations of polypeptide conformations in water: A comparison of α, β, and poly (pro) II conformations

N Sreerama, RW Woody - Proteins: Structure, Function, and …, 1999 - Wiley Online Library
A significant fraction of the so‐called “random coil” residues in globular proteins exists in the
left‐handed poly (Pro) II conformation. In order to compare the behavior of this secondary …

Role of solvent in determining conformational preferences of alanine dipeptide in water

AN Drozdov, A Grossfield… - Journal of the American …, 2004 - ACS Publications
Evidence from a variety of spectroscopic probes indicates that (ϕ, ψ) values corresponding
to the left-handed polyproline II helix (PII) are preferred for short alanine-based peptides in …

The polyproline II conformation in short alanine peptides is noncooperative

K Chen, Z Liu, NR Kallenbach - Proceedings of the …, 2004 - National Acad Sciences
The finding that short alanine peptides possess a high fraction of polyproline II (PII) structure
(Φ=-75°, Ψ=+ 145°) at low temperature has broad implications for unfolded states of …

Dominant solvation effects from the primary shell of hydration: Approximation for molecular dynamics simulations

D Beglov, B Roux - Biopolymers: Original Research on …, 1995 - Wiley Online Library
A simple approximation is developed to account for the dominant effects of solvation in
molecular dynamics simulations of biopolymers. A small number of water molecules are …

Local water bridges and protein conformational stability

M Petukhov, D Cregut, CM Soares, L Serrano - Protein Science, 1999 - cambridge.org
Recent studies have pointed out the important role of local water structures in protein
conformational stability. Here, we present an accurate and computationally effective way to …

Optimizing protein− solvent force fields to reproduce intrinsic conformational preferences of model peptides

PS Nerenberg, T Head-Gordon - Journal of Chemical Theory and …, 2011 - ACS Publications
While most force field efforts in biomolecular simulation have focused on the parametrization
of the protein, relatively little attention has been paid to the quality of the accompanying …

The solvation interface is a determining factor in peptide conformational preferences

EJ Sorin, YM Rhee, MR Shirts, VS Pande - Journal of molecular biology, 2006 - Elsevier
The 21 residue polyalanine-based Fs peptide was studied using thousands of long, explicit
solvent, atomistic molecular dynamics simulations that reached equilibrium at the ensemble …

Assessing backbone solvation effects in the conformational propensities of amino acid residues in unfolded peptides

NV Ilawe, AE Raeber, R Schweitzer-Stenner… - Physical Chemistry …, 2015 - pubs.rsc.org
Conformational ensembles of individual amino acid residues within model GxG peptides (x
representing different amino acid residues) are dominated by a mixture of polyproline II …