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The ability to induce apoptosis is the most important tumor-suppression function of p53. Inhibitory member of apoptosis-stimulating protein of p53 family (iASPP) is an apoptotic-specific regulator of p53. iASPP suppresses apoptosis by inhibiting the transactivation function of p53 on the promoters of proapoptotic genes; however, the mechanism whereby iASPP influences apoptosis in tumor cells with...
The BH3-only protein PUMA plays an important role in the activation of apoptosis in response to p53. In different studies, PUMA has been described to function by either directly activating the pro-apoptotic proteins Bax and Bak, or by neutralizing anti-apoptotic members of the Bcl2 family. We have examined the contribution of regions of PUMA other than the BH3 domain to its localization and function...
The p73 gene codes for various different protein isoforms. They include proteins expressed under the control of the P1 promoter that contain a transactivation domain and are similar in function to p53 (TAp73 isoforms), as well as proteins regulated by the P2 promoter that lack this domain and function as dominant negative inhibitors of TAp73 and p53 (ΔNp73 isoforms). Whereas TAp73 functions as a tumor...
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