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Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

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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.
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Protein Organization01:24

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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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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Methods for Molecular Modelling of Protein Complexes.

Tejashree Rajaram Kanitkar1, Neeladri Sen1, Sanjana Nair1

  • 1Indian Institute of Science Education and Research Pune, Pashan, Pune, India.

Methods in Molecular Biology (Clifton, N.J.)
|May 5, 2021
PubMed
Summary
This summary is machine-generated.

Predicting the 3D structures of protein complexes is crucial for understanding biological mechanisms. This guide helps select appropriate computational methods and software for modeling various protein-biomolecule interactions and assessing their accuracy.

Keywords:
3D structure modellingMolecular dockingProtein-biomolecular complexesScoring and sampling

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Area of Science:

  • Structural Biology
  • Computational Biology
  • Bioinformatics

Background:

  • Biological processes rely on complexes of proteins and biomolecules.
  • Understanding the 3D structures of these complexes is key to elucidating molecular mechanisms.
  • Computational methods are used to predict these structures.

Purpose of the Study:

  • To provide a guide for selecting appropriate computational software for modeling protein-biomolecule complexes.
  • To cover various interaction types: protein-small molecule ligand, protein-peptide, protein-protein, and protein-nucleic acid.
  • To offer guidance on assessing the fidelity of predicted complex structures.

Main Methods:

  • Review and categorization of computational modeling software for protein-biomolecule complexes.
  • Discussion of sampling and scoring protocols in model building.
  • Identification of independent scoring schemes for model assessment.

Main Results:

  • A framework for choosing software based on biomolecule type and data availability.
  • An overview of methods for protein-ligand, protein-peptide, protein-protein, and protein-nucleic acid complex modeling.
  • Recommendations for validating predicted complex structures.

Conclusions:

  • Selecting the right computational tool is vital for accurate protein complex modeling.
  • Independent assessment of predicted models enhances confidence in their reliability.
  • This guide aids researchers in navigating the landscape of structural prediction software.