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• W2324293521 abstract "The use of the tumor suppressor p53 for gene therapy of cancer is limited by the dominant negative inactivating effect of mutant endogenous p53 in cancer cells. We have shown previously that swapping the tetramerization domain (TD) of p53 with the coiled-coil (CC) from Bcr allows for our chimeric p53 (p53-CC) to evade hetero-oligomerization with endogenous mutant p53. This enhances the utility of this construct, p53-CC, for cancer gene therapy. Because domain swapping to create p53-CC could result in p53-CC interacting with endogenous Bcr, which is ubiquitous in cells, modifications on the CC domain are necessary to minimize potential interactions with Bcr. Hence, we investigated the possible design of mutations that will improve homodimerization of CC mutants and disfavor hetero-oligomerization with wild-type CC (CCwt), with the goal of minimizing potential interactions with endogenous Bcr in cells. This involved integrated computational and experimental approaches to rationally design an enhanced version of our chimeric p53-CC tumor suppressor. Indeed, the resulting lead candidate p53-CCmutE34K-R55E avoids binding to endogenous Bcr and retains p53 tumor suppressor activity. Specifically, p53-CCmutE34K-R55E exhibits potent apoptotic activity in a variety of cancer cell lines, regardless of p53 status (in cells with mutant p53, wild-type p53, or p53-null cells). This construct overcomes the dominant negative effect limitation of wt p53 and has high significance for future gene therapy for treatment of cancers characterized by p53 dysfunction, which represent over half of all human cancers." @default.
• W2324293521 created "2016-06-24" @default.
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• W2324293521 date "2014-05-29" @default.
• W2324293521 modified "2023-09-28" @default.
• W2324293521 title "Re-Engineered p53 Chimera with Enhanced Homo-Oligomerization That Maintains Tumor Suppressor Activity" @default.
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• W2324293521 doi "https://doi.org/10.1021/mp500202p" @default.
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