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Estimating dispensable content in the human interactome.

Mohamed Ghadie1, Yu Xia2

  • 1Department of Bioengineering, McGill University, Montreal, QC, Canada.

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This summary is machine-generated.

Less than 20% of human protein-protein interactions (PPIs) are completely dispensable. This study estimates the neutral impact of mutations on the human interactome, revealing the essentiality of most protein connections.

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Area of Science:

  • Genomics
  • Systems Biology
  • Structural Biology

Background:

  • Protein-protein interaction (PPI) networks, or interactomes, are crucial for understanding molecular function, disease, and evolution.
  • Quantifying errors and biases in experimental PPI data is advancing, but the proportion of functionally neutral PPIs remains unknown.
  • Dispensable PPIs are those whose disruption has no significant effect on cellular function.

Purpose of the Study:

  • To estimate the fraction of the human interactome that is completely dispensable.
  • To determine the proportion of PPIs that are effectively neutral upon mutation.
  • To analyze the impact of common and disease-causing mutations on PPI network integrity.

Main Methods:

  • Construction of a human structural interactome using homology-based 3D structural models for experimentally determined PPIs.
  • Mapping of common and Mendelian disease mutations onto the structural interactome.
  • Structure-based computational analysis to predict how mutations perturb PPIs.

Main Results:

  • An estimated <~20% of the human interactome is completely dispensable.
  • Analysis included both predicted and experimentally determined interactome perturbation patterns.
  • The study differentiates between neutral and non-neutral mutations' effects on PPIs.

Conclusions:

  • The majority of human protein-protein interactions are essential and not completely dispensable.
  • Understanding PPI essentiality provides insights into genetic disease and evolutionary processes.
  • This work contributes to a more accurate map of the human interactome and its functional significance.