Publication

Accuracy of Current All-Atom Force-Fields in Modeling Protein Disordered States

Alessandro Barducci
2015
Journal Articles

Abstract

Molecular Dynamics (MD) plays a fundamental role in characterizing protein disordered states that are emerging as crucial actors in many biological processes. Here we assess the accuracy of three current force-fields in modeling disordered peptides by combining enhanced-sampling MD simulations with NMR data. These force-fields generate significantly different conformational ensembles, and AMBER03w [Best and Mittal J. Phys. Chem. B 2010, 114, 14916-14923] provides the best agreement with experiments, which is further improved by adding the ILDN corrections [Lindorff-Larsen et al. Proteins 2010, 78, 1950-1958].

Official source

https://infoscience.epfl.ch/entities/publication/7002bc23-1140-4843-b59d-acb70087ba42

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Alessandro Barducci
2015
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7002bc23-1140-4843-b59d-acb70087ba42

About this result

Related concepts (16)

Intrinsically disordered proteins

In molecular biology, an intrinsically disordered protein (IDP) is a protein that lacks a fixed or ordered three-dimensional structure, typically in the absence of its macromolecular interaction partners, such as other proteins or RNA. IDPs range from fully unstructured to partially structured and include random coil, molten globule-like aggregates, or flexible linkers in large multi-domain proteins. They are sometimes considered as a separate class of proteins along with globular, fibrous and membrane proteins.

Protein structure

Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule. Proteins are polymers - specifically polypeptides - formed from sequences of amino acids, which are the monomers of the polymer. A single amino acid monomer may also be called a residue, which indicates a repeating unit of a polymer. Proteins form by amino acids undergoing condensation reactions, in which the amino acids lose one water molecule per reaction in order to attach to one another with a peptide bond.

Protein folding

Protein folding is the physical process where a protein chain is translated into its native three-dimensional structure, typically a "folded" conformation, by which the protein becomes biologically functional. Via an expeditious and reproducible process, a polypeptide folds into its characteristic three-dimensional structure from a random coil. Each protein exists first as an unfolded polypeptide or random coil after being translated from a sequence of mRNA into a linear chain of amino acids.

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