New Genes Born-In or Invading Vertebrate Genomes.

Area of Science:

• Evolutionary Biology
• Genomics
• Developmental Biology

Background:

• Traditionally, gene origins were primarily attributed to duplication and divergence.
• Recent advances integrate genetics, developmental biology, and bioinformatics to explore novel gene origins.

Purpose of the Study:

• To summarize recent research on gene origins, focusing on de novo generation and horizontal gene transfer.
• To highlight the role of viruses and transposons in shaping vertebrate genomes and driving innovation.

Main Methods:

• Review of recent scientific literature.
• Analysis of genomic data, particularly in vertebrate lineages.
• Focus on protein-coding gene novelties and their integration into existing gene networks.

Main Results:

• De novo gene creation and domestication of viral/transposon sequences contribute significantly to genome evolution.
• Innovations such as the placenta, adaptive immune system, and neocortex are linked to these novel gene origins.
• Bats' high viral tolerance may stem from past virus and transposon invasions.

Conclusions:

• Gene origins are more diverse than previously thought, involving de novo creation and horizontal gene transfer.
• Virus and transposon integration has been a major driver of evolutionary innovation in vertebrates.
• Understanding these mechanisms provides insights into species-specific adaptations, like bat viral resistance.