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XB-ART-7161
Mol Biol Cell 2002 May 01;135:1536-49. doi: 10.1091/mbc.02-02-0010.
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Targeted destruction of DNA replication protein Cdc6 by cell death pathways in mammals and yeast.

Blanchard F , Rusiniak ME , Sharma K , Sun X , Todorov I , Castellano MM , Gutierrez C , Baumann H , Burhans WC .


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The highly conserved Cdc6 protein is required for initiation of eukaryotic DNA replication and, in yeast and Xenopus, for the coupling of DNA replication to mitosis. Herein, we show that human Cdc6 is rapidly destroyed by a p53-independent, proteasome-, and ubiquitin-dependent pathway during early stages of programmed cell death induced by the DNA-damaging drug adozelesin, or by a separate caspase-dependent pathway in cells undergoing apoptosis through an extrinsic pathway induced by tumor necrosis factor-alpha and cycloheximide. The proteasome-dependent pathway induced by adozelesin is conserved in the budding yeast Saccharomyces cerevisiae. The destruction of Cdc6 may be a primordial programmed death response that uncouples DNA replication from the cell division cycle, which is reinforced in metazoans by the evolution of caspases and p53.

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Species referenced: Xenopus
Genes referenced: cdc6 tp53

References [+] :
Agami, Distinct initiation and maintenance mechanisms cooperate to induce G1 cell cycle arrest in response to DNA damage. 2000, Pubmed