Format

Send to

Choose Destination
Proc Natl Acad Sci U S A. 2019 Sep 24;116(39):19593-19599. doi: 10.1073/pnas.1906559116. Epub 2019 Sep 9.

Evolution-based screening enables genome-wide prioritization and discovery of DNA repair genes.

Author information

1
Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213.
2
School of Sport, Health and Social Sciences, Solent University, Southampton SO14 0YN, United Kingdom.
3
Department of Computational and Systems Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213.
4
Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; karab@pitt.edu.

Abstract

DNA repair is critical for genome stability and is maintained through conserved pathways. Traditional genome-wide mammalian screens are both expensive and laborious. However, computational approaches circumvent these limitations and are a powerful tool to identify new DNA repair factors. By analyzing the evolutionary relationships between genes in the major DNA repair pathways, we uncovered functional relationships between individual genes and identified partners. Here we ranked 17,487 mammalian genes for coevolution with 6 distinct DNA repair pathways. Direct comparison to genetic screens for homologous recombination or Fanconi anemia factors indicates that our evolution-based screen is comparable, if not superior, to traditional screening approaches. Demonstrating the utility of our strategy, we identify a role for the DNA damage-induced apoptosis suppressor (DDIAS) gene in double-strand break repair based on its coevolution with homologous recombination. DDIAS knockdown results in DNA double-strand breaks, indicated by ATM kinase activation and 53BP1 foci induction. Additionally, DDIAS-depleted cells are deficient for homologous recombination. Our results reveal that evolutionary analysis is a powerful tool to uncover novel factors and functional relationships in DNA repair.

KEYWORDS:

DDIAS; DNA repair; evolution; genome integrity; homologous recombination

PMID:
31501324
DOI:
10.1073/pnas.1906559116

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center