Skip to main content
Log in

Systemic and rapid restructuring of the genome: a new perspective on punctuated equilibrium

  • Mini-Review
  • Published:
Current Genetics Aims and scope Submit manuscript

Abstract

The rates and patterns by which cells acquire mutations profoundly shape their evolutionary trajectories and phenotypic potential. Conventional models maintain that mutations are acquired independently of one another over many successive generations. Yet, recent evidence suggests that cells can also experience mutagenic processes that drive rapid genome evolution. One such process manifests as punctuated bursts of genomic instability, in which multiple new mutations are acquired simultaneously during transient episodes of genomic instability. This mutational mode is reminiscent of the theory of punctuated equilibrium, proposed by Stephen Jay Gould and Niles Eldredge in 1972 to explain the burst-like appearance of new species in the fossil record. In this review, we survey the dominant and emerging theories of eukaryotic genome evolution with a particular focus on the growing body of work that substantiates the existence and importance of punctuated bursts of genomic instability. In addition, we summarize and discuss two recent studies from our own group, the results of which indicate that punctuated bursts systemic genomic instability (SGI) can rapidly reconfigure the structure of the diploid genome of Saccharomyces cerevisiae.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2

Similar content being viewed by others

References

Download references

Acknowledgments

This work was supported by NIH/NIGMS awards 1K99GM13419301 to LRH and R35GM11978801 to JLA.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Lydia R. Heasley.

Additional information

Communicated by M. Kupiec.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Heasley, L.R., Sampaio, N.M.V. & Argueso, J.L. Systemic and rapid restructuring of the genome: a new perspective on punctuated equilibrium. Curr Genet 67, 57–63 (2021). https://doi.org/10.1007/s00294-020-01119-2

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00294-020-01119-2

Keywords

Navigation