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This study introduces phylointeractomics, combining phylogenomics and proteomics to track protein evolution. It reveals functional changes in the shelterin complex across vertebrates, offering new insights into evolutionary relationships.

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Area of Science:

  • Evolutionary biology
  • Genomics
  • Proteomics

Background:

  • Molecular phylogenomics uses genomic data to study evolutionary relationships.
  • Protein interactions evolve rapidly, driving functional diversification despite genomic conservation.
  • The shelterin complex, crucial for telomere protection, provides a model for studying functional evolution.

Purpose of the Study:

  • To combine phylogenomics with interaction proteomics to investigate functional evolution of protein complexes.
  • To analyze the molecular evolution of the shelterin complex across 16 vertebrate species, spanning 450 million years.
  • To discover novel telomere-associated proteins and understand functional divergence of homologous proteins.

Main Methods:

  • Phylointeractomics: integrating phylogenomics with interaction proteomics.
  • Comparative analysis of the shelterin complex across 16 vertebrate species (zebrafish to humans).
  • Identification of evolutionary changes in protein function and interactions.

Main Results:

  • Discovery of previously unknown telomere-associated proteins.
  • Demonstration of functional evolution in homologous proteins within the shelterin complex.
  • Identification of TERF1 evolving as a telomere-binding protein in mammals.

Conclusions:

  • Phylointeractomics is a versatile and scalable approach for studying protein functional evolution.
  • This method provides experimental evidence supporting phylogenomic relationships.
  • Understanding protein interaction evolution is key to explaining functional diversification.