TY - JOUR A1 - Brandt, Tobias A1 - Townsley, Fiona M. A1 - Teufel, Daniel P. A1 - Freund, Stefan M. V. A1 - Veprintsev, Dmitry B. T1 - Molecular basis for modulation of the p53 target selectivity by KLF4 T2 - PLoS One N2 - The tumour suppressor p53 controls transcription of various genes involved in apoptosis, cell-cycle arrest, DNA repair and metabolism. However, its DNA-recognition specificity is not nearly sufficient to explain binding to specific locations in vivo. Here, we present evidence that KLF4 increases the DNA-binding affinity of p53 through the formation of a loosely arranged ternary complex on DNA. This effect depends on the distance between the response elements of KLF4 and p53. Using nuclear magnetic resonance and fluorescence techniques, we found that the amino-terminal domain of p53 interacts with the KLF4 zinc fingers and mapped the interaction site. The strength of this interaction was increased by phosphorylation of the p53 N-terminus, particularly on residues associated with regulation of cell-cycle arrest genes. Taken together, the cooperative binding of KLF4 and p53 to DNA exemplifies a regulatory mechanism that contributes to p53 target selectivity. Y1 - 2012 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/26584 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-265849 SN - 1932-6203 N1 - Copyright: © 2012 Brandt et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. VL - 7 IS - (10):e48252 PB - PLoS CY - Lawrence, Kan. ER -