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Protein Complexes with Interchangeable Parts01:57

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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.
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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...
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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
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Modeling of Protein Complexes.

Luigi Scietti1, Federico Forneris2

  • 1Department of Biology and Biotechnology, The Armenise-Harvard Laboratory of Structural Biology, University of Pavia, Pavia, Italy. luigi.scietti@unipv.it.

Methods in Molecular Biology (Clifton, N.J.)
|March 24, 2023
PubMed
Summary
This summary is machine-generated.

Creating protein complex models is now easier for researchers. This guide simplifies multi-protein modeling from individual protein structures, using practical examples for homomeric and heteromeric complexes.

Keywords:
3D structure predictionProtein complexesinteraction surfacesprotein computational modelingprotein-protein interactions

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Area of Science:

  • Structural Biology
  • Computational Biology
  • Biochemistry

Background:

  • Advances in structural biology and computational power have simplified individual protein homology modeling.
  • Modeling individual proteins is now accessible to a broader scientific audience.
  • However, constructing models of multi-protein complexes remains challenging for non-experts.

Purpose of the Study:

  • To provide an overview of methods for generating multi-protein complex models from individual protein homology models.
  • To guide researchers, particularly non-experts, in modeling protein complexes.
  • To illustrate the process with real-life examples of homomeric and heteromeric complexes.

Main Methods:

  • Utilizing advances in structural biology, computational capabilities, and software.
  • Employing guided pipelines with advanced computational tools and user-friendly interfaces.
  • Applying specific procedures tailored to the investigated system and incorporating experimental validation.

Main Results:

  • Demonstration of approaches for generating multi-protein complex models.
  • Practical examples illustrating the modeling of homomeric protein complexes.
  • Practical examples illustrating the modeling of heteromeric protein complexes.

Conclusions:

  • The presented approaches simplify the generation of multi-protein complex models.
  • This work aims to make protein complex modeling more accessible to scientists.
  • The provided examples serve as a guide for creating both homomeric and heteromeric protein models.