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Related Concept Videos

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 Organization01:13

Protein Organization

Overview
Protein Organization01:13

Protein Organization

Overview
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...

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Related Experiment Video

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Application of I TASSER, trRosetta, UCSF Chimera, HADDOCK server, and HEX loria for De Novo and In Silico Design of Proteins
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Robustness and generalization of structure-based models for protein folding and function.

Heiko Lammert1, Alexander Schug, José N Onuchic

  • 1Center for Theoretical Biological Physics and Department of Physics, University of California, San Diego, La Jolla, California 92093, USA.

Proteins
|July 24, 2009
PubMed
Summary
This summary is machine-generated.

A novel adaptable contact potential enhances structure-based protein models for studying protein dynamics and functional transitions. This flexible potential overcomes limitations of fixed potentials, enabling more accurate simulations of complex protein behaviors.

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A Protocol for Computer-Based Protein Structure and Function Prediction
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A Protocol for Computer-Based Protein Structure and Function Prediction

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Area of Science:

  • Computational Biology
  • Biophysics
  • Protein Dynamics

Background:

  • Protein folding is guided by energy landscapes, simulated using structure-based models.
  • Conventional models face limitations in simulating multiple conformations required for allostery and ligand binding.
  • Existing generalizations often lead to computational clashes due to fixed potential shapes.

Purpose of the Study:

  • To develop a new, flexible contact potential for structure-based protein models.
  • To enable simulations of multiple stable conformations and functional transitions.
  • To enhance the applicability of structure-based models for advanced studies.

Main Methods:

  • Developed a new contact potential combining Gaussian attractions and a flexible repulsive term.
  • Performed sensitivity analysis on five small proteins using the adaptable potential.
  • Simulated structural transitions in the ROP dimer, incorporating alternative contact distances.

Main Results:

  • The new potential allows for easy and consistent introduction of multiple energy minima.
  • Confirmed robust behavior and quantitative adjustment of folding thermodynamics in structure-based models.
  • Demonstrated the model's ability to simulate distinct structural states and transitions, like syn and anti conformations in the ROP dimer.

Conclusions:

  • The adaptable potential significantly enhances the flexibility and applicability of structure-based models.
  • Facilitates advanced simulations of protein functional dynamics, allostery, and ligand binding.
  • Enables the construction of generalized models for studying structural transitions and protein disorder.