Cells with irreparable DNA damage normally induce programmed cell death, or apoptosis. However, this mechanism often fails in tumor cells so that transformed cells are able to multiply and spread throughout the body. Scientists at the German Cancer Research Center have now discovered a possible cause of this failure.
Melanie Winter, Dirk Sombroek, Ilka Dauth, Jutta Moehlenbrink, Karin Scheuermann, Johanna Crone and Thomas G. Hofmann: Control of HIPK2 stability by ubiquitin ligase Siah-1 and checkpoint kinases ATM and ATR. Nature Cell Biology, 2008; DOI 10.1038/ncb1743.