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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Negative regulation of the mammalian UV response by Myc through association with Miz-1.

The Myc oncoprotein represses initiator-dependent transcription through the POZ domain transcription factor Miz-1. We now show that transactivation by Miz-1 is negatively regulated by association with topoisomerase II binding protein (TopBP1); UV irradiation downregulates expression of TopBP1 and releases Miz-1. Miz-1 binds to the p21Cip1 core promoter in vivo and is required for upregulation of p21Cip1 upon UV irradiation. Using both c-myc(-/-) cells and a point mutant of Myc that is deficient in Miz-1 dependent repression, we show that Myc negatively regulates transcription of p21Cip1 upon UV irradiation and facilitates recovery from UV-induced cell cycle arrest through binding to Miz-1. Our data implicate Miz-1 in a pathway that regulates cell proliferation in response to UV irradiation.[1]

References

  1. Negative regulation of the mammalian UV response by Myc through association with Miz-1. Herold, S., Wanzel, M., Beuger, V., Frohme, C., Beul, D., Hillukkala, T., Syvaoja, J., Saluz, H.P., Haenel, F., Eilers, M. Mol. Cell (2002) [Pubmed]
 
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