ATM activation and signaling under hypoxic conditions.

@article{Bencokova2009ATMAA,
  title={ATM activation and signaling under hypoxic conditions.},
  author={Zuzana Bencokova and Muriel R. Kaufmann and Isabel M Pires and Philip S. Lecane and Amato J. Giaccia and Ester M Hammond},
  journal={Molecular and cellular biology},
  year={2009},
  volume={29 2},
  pages={526-37}
}
The ATM kinase has previously been shown to respond to the DNA damage induced by reoxygenation following hypoxia by initiating a Chk 2-dependent cell cycle arrest in the G(2) phase. Here we show that ATM is both phosphorylated and active during exposure to hypoxia in the absence of DNA damage, detectable by either comet assay or 53BP1 focus formation. Hypoxia-induced activation of ATM correlates with oxygen concentrations low enough to cause a replication arrest and is entirely independent of… CONTINUE READING

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