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Related Concept Videos

Protein-protein Interfaces02:04

Protein-protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Protein-Protein Interfaces02:04

Protein-Protein Interfaces

Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a polypeptide...
Protein Organization01:24

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.
Protein Folding01:22

Protein Folding

Overview
Protein Folding01:25

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 Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...

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Structure-Based Simulation and Sampling of Transcription Factor Protein Movements along DNA from Atomic-Scale Stepping to Coarse-Grained Diffusion
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A coarse grain model for protein-surface interactions.

Shuai Wei1, Thomas A Knotts

  • 1Department of Chemical Engineering, Brigham Young University, Provo, Utah 84602, USA.

The Journal of Chemical Physics
|September 14, 2013
PubMed
Summary
This summary is machine-generated.

A new coarse-grained model accurately predicts protein-surface interactions, improving computational efficiency and understanding of protein behavior in fields like biotechnology and medicine.

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Area of Science:

  • Biophysics
  • Computational Chemistry
  • Materials Science

Background:

  • Protein-surface interactions are crucial in biotechnology, proteomics, sensors, and medicine.
  • Current molecular simulation models for protein-surface interactions lack chemical specificity and are rudimentary.
  • A deeper understanding of how surfaces affect protein stability and structure is needed.

Purpose of the Study:

  • To develop a novel, computationally efficient coarse-grained model for protein-surface interactions.
  • To incorporate chemical specificity of both proteins and surfaces into the model.
  • To validate the model's predictive power against experimental data.

Main Methods:

  • A one-bead-per-residue coarse-grained model was developed for protein-surface interactions.
  • The model incorporates chemical specificity of protein residues and surfaces.
  • Parameterization was performed using experimental adsorption energies of model peptides on various surfaces.

Main Results:

  • The model quantitatively and qualitatively predicts the free energy of adsorption for proteins on different surfaces.
  • The model accurately predicts structural changes in proteins upon surface interaction.
  • Validation with proteins not used in parameterization demonstrated remarkable agreement between simulation and experiment.

Conclusions:

  • The developed model offers a significant advancement in simulating protein-surface interactions.
  • This model provides a more accurate and efficient tool for studying protein behavior in diverse applications.
  • The findings enhance fundamental understanding of protein stability and structure modulation by surfaces.