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The DNA damage response pathways: at the crossroad of protein modifications Huen MS; Chen JCell Res 2008[Jan]; 18 (1): 8-16Post-translational modifications play a crucial role in coordinating cellular response to DNA damage. Recent evidence suggests an interplay between multiple protein modifications, including phosphorylation, ubiquitylation, acetylation and sumoylation, that combine to propagate the DNA damage signal to elicit cell cycle arrest, DNA repair, apoptosis and senescence. Utility of specific post-translational modifiers allows temporal and spatial control over protein relocalization and interactions, and may represent a means for trans-regulatory activation of protein activities. The ability to recognize these specific modifiers also underscores the capacity for signal amplification, a crucial step for the maintenance of genomic stability and tumor prevention. Here we have summarized recent findings that highlight the complexity of post-translational modifications in coordinating the DNA damage response, with emphasis on the DNA damage signaling cascade.|Animals[MESH]|DNA Damage/*physiology[MESH]|DNA Repair Enzymes/*metabolism[MESH]|DNA Repair/*physiology[MESH]|Humans[MESH]|Models, Biological[MESH]|Peptide Hydrolases/physiology[MESH]|Phosphorylation[MESH]|Protein Binding/physiology[MESH]|Protein Processing, Post-Translational/*physiology[MESH]|Signal Transduction/physiology[MESH]|Ubiquitin/metabolism[MESH]|Ubiquitination/genetics/physiology[MESH] |
