Article
Susceptibility of p53 unstructured N terminus to 20 S proteasomal degradation programs the stress response.
The Journal of biological chemistry - 25 Sept 2009
Tsvetkov Peter, Reuven Nina, Prives Carol, Shaul Yosef
Abstract excerpt
The N-terminal transcription activation domain of p53 is intrinsically unstructured. We show in vitro and in vivo that this domain initiates p53 degradation by the 20 S proteasome in a ubiquitin-independent fashion. The decay of metabolically labeled p53 follows biphasic kinetics with an immediate fast phase that is ubiquitin-independent and a second slower phase that is ubiquitin-dependent. The 20 S proteasome...
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