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• W2037936747 abstract "The protein p53 plays an active role in the regulation of cell cycle. In about half of human cancers, the protein is inactivated by mutations located primarily in its DNA-binding domain. Interestingly, a number of these mutations possess temperature-induced DNA-binding characteristics. A striking example is the mutation of Arg248 into glutamine or tryptophan. These mutants are defective for binding to DNA at 310 K although they have been shown to bind specifically to several p53 response elements at sub-physiological temperatures (298-306 K).This important experimental finding motivated us to examine the effects of temperature on the structure and configuration of R248Q mutant and compare it to the wild type protein. Our aim is to determine how and where structural changes of mutant variants take place due to temperature changes. To answer these questions, we compared the mutant to the wild-type proteins from two different aspects. First, we investigated the systems at the atomistic level through their DNA-binding affinity, hydrogen bond networks and spatial distribution of water molecules. Next, we assessed changes in their long-lived conformational motions at the coarse-grained level through the collective dynamics of their side-chain and backbone atoms separately.The experimentally observed effect of temperature on the DNA-binding properties of p53 is reproduced. Analysis of atomistic and coarse-grained data reveal that changes in binding are determined by a few key residues and provide a rationale for the mutant-loss of binding at physiological temperatures. The findings can potentially enable a rescue strategy for the mutant structure." @default.
• W2037936747 created "2016-06-24" @default.
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• W2037936747 date "2011-11-16" @default.
• W2037936747 modified "2023-10-09" @default.
• W2037936747 title "Effects of Temperature on the p53-DNA Binding Interactions and Their Dynamical Behavior: Comparing the Wild Type to the R248Q Mutant" @default.
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• W2037936747 doi "https://doi.org/10.1371/journal.pone.0027651" @default.
• W2037936747 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3218007" @default.
• W2037936747 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22110706" @default.
• W2037936747 hasPublicationYear "2011" @default.
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