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Recurrent inversion toggling and great ape genome evolution.

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Great ape inversions, crucial for evolution and disease, were extensively mapped using advanced sequencing. These inversions, particularly on the X chromosome, impact gene expression and human neurodevelopmental disorders.

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Area of Science:

  • Genomics
  • Evolutionary Biology
  • Genetics

Background:

  • Genomic inversions are significant in evolution and disease but challenging to study due to repetitive DNA at breakpoints.
  • Previous studies had limited data on great ape inversions.

Purpose of the Study:

  • To significantly expand the catalog of great ape inversions.
  • To investigate the genomic distribution and evolutionary impact of inversions.
  • To understand the relationship between inversions, gene expression, and human disease.

Main Methods:

  • Employed single-cell DNA template strand sequencing and long-read sequencing.
  • Analyzed 1,069 great ape inversions.
  • Constructed megabase-pair scale haplotypes for individual chromosomes.

Main Results:

  • Identified 1,069 great ape inversions, a sixfold increase.
  • Found the X chromosome is disproportionately enriched for inversions.
  • Observed an excess of differentially expressed genes near large inversions (>100 kb).
  • Demonstrated that new lineage-specific duplications preferentially arise in inverted orientations.
  • Discovered 23 genomic regions with recurrent inversions over 15 million years.
  • Linked the direct orientation of human polymorphisms to copy number variants in neurodevelopmental diseases.

Conclusions:

  • Advanced sequencing methods greatly enhance the study of complex genomic rearrangements like inversions.
  • Inversions are dynamic genomic features influencing primate evolution, gene regulation, and human disease susceptibility.
  • Recurrent inversion events and their orientation bias in duplications offer insights into genome plasticity and disease mechanisms.