Abstract
Understanding how p53 is able to specifically respond to particular stress signals and regulate many different signalling pathways remains a challenge. Several studies have demonstrated that p53’s interactions with different protein partners are essential for it to be able to coordinate specific responses. In particular, the apoptotic pathway is regulated by p53 in cooperation with the Apoptosis Stimulating Proteins of p53 (ASPP) proteins. In this study, we showed that the ASPP proteins are able to bind and cooperate with p300, a well defined co-factor of p53, to selectively regulate p53’s transcriptional activity on promoters such as p53-inducible gene 3 but not on p21waf1. This is the first demonstration that the ASPPs can function together with p300 in regulating the transcriptional activity of p53. Structured summary of protein interactionsASPP2physically interacts with p300 and p53 by anti bait coimmunoprecipitation(View interaction)iASPPphysically interacts with p300 by anti bait coimmunoprecipitation(View interaction)iASPPphysically interacts with p300 and p53 by anti bait coimmunoprecipitation(View interaction)ASPP2physically interacts with p300 by anti bait coimmunoprecipitation(View interaction)ASPP1physically interacts with p300 by anti bait coimmunoprecipitation(View interaction)ASPP1physically interacts with p300 and p53 by anti bait coimmunoprecipitation(View interaction)
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