Cited by 656Bioinformatics and Genomic NetworksEvolution and Genetic DynamicsGenomics and Phylogenetic Studies

Comparative Genomics of Centrality and Essentiality in Three Eukaryotic Protein-Interaction Networks

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Hahn, Matthew W., Kern, Andrew D.·2005·Molecular Biology and Evolution

Abstract

Most proteins do not evolve in isolation, but as components of complex genetic networks. Therefore, a protein's position in a network may indicate how central it is to cellular function and, hence, how constrained it is evolutionarily. To look for an effect of position on evolutionary rate, we examined the protein-protein interaction networks in three eukaryotes: yeast, worm, and fly. We find that the three networks have remarkably similar structure, such that the number of interactors per protein and the centrality of proteins in the networks have similar distributions. Proteins that have a more central position in all three networks, regardless of the number of direct interactors, evolve more slowly and are more likely to be essential for survival. Our results are thus consistent with a classic proposal of Fisher's that pleiotropy constrains evolution.

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  • Degree centrality reports how many edges (genes) are directly connected to a node (TF); highly connected nodes are likely to be essential for a biological process.

    “Degree centrality is a straightforward measure that reports how many edges (genes) are directly connected to a node (TF); highly connected nodes are likely to be essential for a biological process35,36.”

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Authors
Hahn, M. W., & Kern, A. D.
Affiliations
University of California, Davis (US)
Corresponding author
Hahn, Matthew W.
Venue
Molecular Biology and Evolution
Published
2004-12-22
Volume
22
Issue
4
Pages
803-806
ISSN
  • 0737-4038 (ISSN-L)
  • 1537-1719
OpenAlex
W2074443723
Cited by
656
References
28
Citations by year
2026: 13 · 2025: 20 · 2024: 30 · 2023: 32 · 2022: 27 · 2021: 39 · 2020: 35 · 2019: 29 · 2018: 30 · 2017: 25 · 2016: 36 · 2015: 43 · 2014: 37 · 2013: 38 · 2012: 41
FWCI
6.16
Type
journal article
Language
en
Open access
Locations
  • Molecular Biology and Evolution (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • Howard Hughes Medical Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
protein-protein interaction network, network centrality, protein essentiality, evolutionary rates, pleiotropy, network topology, Saccharomyces cerevisiae, Caenorhabditis elegans, Drosophila melanogaster, eukaryotic evolution
MeSH terms
Eukaryotic Cells, Biological Evolution, Proteins, Genomics

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