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Letter

Nature Cell Biology 5, 1008–1015 (1 November 2003) | doi:10.1038/ncb1061

Radiation-mediated proteolysis of CDT1 by CUL4|[ndash]|ROC1 and CSN complexes constitutes a new checkpoint

Leigh Ann A. Higa , Ivailo S. Mihaylov , Damon P. Banks , Jianyu Zheng & Hui Zhang

Genomic integrity is maintained by checkpoints that guard against undesired replication after DNA damage. Here, we show that CDT1, a licensing factor of the pre-replication complex (preRC), is rapidly proteolysed after UV- or γ-irradiation.