p53-Independent DNA Damage Response

Stable Identifier
R-HSA-69610
Type
Pathway
Species
Homo sapiens
ReviewStatus
5/5
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p53-Independent DNA Damage Response
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In response to DNA damage due to exposure to ultraviolet light or to ionizing radiation, Cdc25A is phosphorylated by Chk1 or Chk2. The phosphorylation of Cdc25A at ser-123, in response to DNA damage from ionizing radiation is a signal for ubiquitination and subsequent degradation of Cdc25A. The destruction of Cdc25A prevents the normal G1/S transition. Cdc25A is required for the activation of the Cyclin E:Cdk2 complexes via dephosphorylation.

Chk1 is activated in response to DNA damage due to uv light. However, the phosphorylation occurs at a different site.

Literature References
PubMed ID Title Journal Year
11298456 The ATM-Chk2-Cdc25A checkpoint pathway guards against radioresistant DNA synthesis.

Lukas, J, Syljuåsen, RG, Mailand, N

Nature 2001
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Events
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as an event of
Orthologous Events
p53-Independent DNA Damage Response (Bos taurus)
p53-Independent DNA Damage Response (Caenorhabditis elegans)
p53-Independent DNA Damage Response (Canis familiaris)
p53-Independent DNA Damage Response (Dictyostelium discoideum)
p53-Independent DNA Damage Response (Drosophila melanogaster)
p53-Independent DNA Damage Response (Gallus gallus)
p53-Independent DNA Damage Response (Mus musculus)
p53-Independent DNA Damage Response (Rattus norvegicus)
p53-Independent DNA Damage Response (Saccharomyces cerevisiae)
p53-Independent DNA Damage Response (Schizosaccharomyces pombe)
p53-Independent DNA Damage Response (Sus scrofa)
p53-Independent DNA Damage Response (Xenopus tropicalis)
Created
Hoffmann, I  (2003-06-05)
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