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Intrinsically Disordered Proteins

Intrinsically Disordered Proteins

Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...

Intrinsically Disordered Proteins

Intrinsically Disordered Proteins

Protein and Protein Structure

Protein and Protein Structure

Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...

Protein Folding

Protein Folding

Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...

Protein Folding

Protein Folding

Protein Organization

Protein Organization

Proteins are polymers of amino acid residues. They are versatile and responsible for different cellular functions, including DNA replication, molecular transport, catalysis, and structural support. Proteins have a hierarchical structure comprising at least three levels of organization: primary, secondary, and tertiary structure. Some large proteins have a quaternary structure where individual protein subunits are linked together.
The primary structure of a protein is its amino acid sequence....

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Author Spotlight: A Computational Approach to Decipher Amino Acid Preferences in Multispecific Protein-Protein Interactions

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Pseudo-Improper-Dihedral Model for Intrinsically Disordered Proteins.

Łukasz Mioduszewski¹, Bartosz Różycki¹, Marek Cieplak¹

¹Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland.

Journal of Chemical Theory and Computation

|May 22, 2020

Summary

This summary is machine-generated.

We developed a new coarse-grained protein model using Cα atoms and a multibody pseudo-improper-dihedral potential. This transferable model accurately simulates intrinsically disordered proteins and their assemblies on millisecond timescales.

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Area of Science:

Computational biology
Biophysics
Protein dynamics

Background:

Simulating intrinsically disordered proteins (IDPs) presents challenges due to their conformational flexibility.
Existing coarse-grained models may struggle to capture complex backbone and side-chain interactions accurately.
Accurate modeling is crucial for understanding IDP function and dysfunction.

Purpose of the Study:

To introduce a novel, transferable coarse-grained Cα-based protein model.
To incorporate a nonradial multibody pseudo-improper-dihedral potential for improved interaction representation.
To enable accurate simulations of intrinsically disordered proteins and their assemblies.

Main Methods:

Development of a coarse-grained model using single Cα-based pseudo-atoms per residue.
Implementation of a transferable, time-independent nonradial multibody pseudo-improper-dihedral potential.
Parameterization of the model specifically for intrinsically disordered proteins.

Main Results:

The model effectively captures backbone and side-chain interactions.
The pseudo-improper-dihedral potential enhances the representation of residue-level interactions.
The model is suitable for molecular dynamics simulations on millisecond timescales.

Conclusions:

The new Cα-based model provides an efficient and accurate approach for simulating intrinsically disordered proteins.
The developed potential is transferable and suitable for long-timescale molecular dynamics.
This model advances the simulation capabilities for complex protein systems.