NDLI: The C-terminal domain of p53 recognizes DNA damaged by ionizing radiation.

Content Provider	PubMed Central
Author	Reed, M. Woelker, B. Wang, P. Wang, Y. Anderson, M. E. Tegtmeyer, P.
Abstract	p53 accumulates after DNA damage and arrests cellular growth. These findings suggest a possible role for p53 in the cellular response to DNA damage. We have previously shown that the C terminus of p53 binds DNA nonspecifically and assembles stable tetramers. In this study, we have utilized purified segments of human and murine p53s to determine which p53 domains may participate in a DNA damage response pathway. We find that the C-terminal 75 amino acids of human or murine p53 are necessary and sufficient for the DNA annealing and strand-transfer activities of p53. In addition, both full-length wild-type p53 and the C-terminal 75 amino acids display an increased binding affinity for DNA damaged by restriction digestion, DNase I treatment, or ionizing radiation. In contrast, the central site-specific DNA-binding domain together with the tetramerization domain does not have these activities. We propose that interactions of the C terminus of p53 with damaged DNA may play a role in the activation of p53 in response to DNA damage.
Starting Page	9455
File Format	PDF
ISSN	10916490
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	21
Volume Number	92
Language	English
Publisher Date	1995-10-10
Access Restriction	Open
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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The C-terminal domain of p53 recognizes DNA damaged by ionizing radiation.