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Related Concept Videos

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Protein-protein Interfaces

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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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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
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The pepATTRACT web server for blind, large-scale peptide-protein docking.

Sjoerd J de Vries1, Julien Rey1, Christina E M Schindler2

  • 1INSERM UMR-S 973/Université Paris Diderot/Sorbonne Paris Cité/RPBS, Paris 75205, France.

Nucleic Acids Research
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Summary

A new web server enables rapid, blind docking of peptide-protein interactions. This tool accelerates computational analysis of the interactome, making large-scale in silico studies feasible.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Bioinformatics

Background:

  • Peptide-protein interactions are crucial cellular processes and key components of the protein interactome.
  • Existing computational docking methods struggle with proteome-scale analysis due to limitations in speed and requirement for binding site information.

Purpose of the Study:

  • To introduce a novel web server implementing the rigid-body stage of the pepATTRACT docking protocol.
  • To provide a fast, fully blind computational tool for analyzing protein-peptide interactions.

Main Methods:

  • Development of a web server for the rigid-body stage of the pepATTRACT protocol.
  • Evaluation of the web server's performance on the peptiDB benchmark dataset.

Main Results:

  • The web server successfully generated a correct protein-peptide model within the top 50 predictions for 34% of cases on the peptiDB benchmark.
  • Computation time was significantly reduced from approximately 18 hours for the full protocol to about 10 minutes for the web server's rigid-body stage.
  • Performance is comparable to state-of-the-art local docking methods, despite requiring no prior binding site information.

Conclusions:

  • The rigid-body pepATTRACT web server offers a computationally efficient solution for large-scale, blind protein-peptide docking.
  • This tool facilitates in silico exploration of the protein-peptide interactome, complementing experimental methods.