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Related Concept Videos

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Investigating Additive and Replacing Horizontal Gene Transfers Using Phylogenies and Whole Genomes.

Lina Kloub1, Sophia Gosselin2, Joerg Graf2,3

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Horizontal gene transfer (HGT) can be additive or replacing. Our new DART framework distinguishes these types, revealing their different roles and integration mechanisms in microbial evolution.

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Area of Science:

  • Microbial genomics
  • Evolutionary biology
  • Bioinformatics

Background:

  • Horizontal gene transfer (HGT) is crucial for microbial evolution.
  • HGT can be additive (new gene) or replacing (gene substitution).
  • Distinguishing HGT types and their mechanisms is poorly understood.

Purpose of the Study:

  • Develop a computational framework to classify HGTs as additive or replacing.
  • Analyze the relative frequencies, functional biases, and integration mechanisms of these HGT types.

Main Methods:

  • Developed a novel computational framework, DART.
  • Leveraged phylogenetic approaches for HGT detection.
  • Classified HGTs based on gene order and phylogenetic relationships.

Main Results:

  • Additive HGT frequency increases with phylogenetic distance; replacing HGT dominates shorter distances.
  • Additive and replacing HGTs exhibit distinct functional profiles.
  • Homologous recombination and mobile elements facilitate additive HGT.

Conclusions:

  • DART provides a scalable and customizable method for HGT classification.
  • Additive and replacing HGTs play distinct roles in microbial adaptation.
  • Understanding HGT types advances knowledge of microbial evolution and adaptation.