Life on the edge: telomeres and persistent DNA breaks converge at the nuclear periphery.

Genes Dev

Department of Pharmacology, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway, New Jersey 08854, USA.

Published: May 2009

AI Article Synopsis

  • Persistent DNA double-strand breaks and telomeres pose significant genomic risks due to their potential to trigger incorrect repair processes.
  • Two recent studies demonstrate that Mps3, a SUN domain protein, sequesters these hazardous DNA ends, protecting them from the rest of the genome.
  • This research highlights the nuclear periphery as a specialized area where these dangerous DNA components are managed to maintain genomic stability.

Article Abstract

Persistent DNA double-strand breaks and telomeres represent genomic hazards, as they can instigate inappropriate repair reactions. Two recent papers by Oza and colleagues (pp. 912-917) and Schober and colleagues (pp. 928-938) show that both types of DNA ends are sequestered from bulk DNA by Mps3, a SUN domain protein that spans the inner nuclear membrane. Anchorage maintains telomere integrity and steers double-strand breaks toward specialized repair pathways. This work defines the nuclear periphery as a subcompartment where dangerous DNA elements can be handled with care.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2763515PMC
http://dx.doi.org/10.1101/gad.1805309DOI Listing

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