Journal
NATURE
Volume 432, Issue 7015, Pages 353-360Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nature03117
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p53 is a tumour suppressor that regulates the cellular response to genotoxic stresses. p53 is a short-lived protein and its activity is regulated mostly by stabilization via different post-translational modifications. Here we report a novel mechanism of p53 regulation through lysine methylation by Set9 methyltransferase. Set9 specifically methylates p53 at one residue within the carboxyl-terminus regulatory region. Methylated p53 is restricted to the nucleus and the modification positively affects its stability. Set9 regulates the expression of p53 target genes in a manner dependent on the p53-methylation site. The crystal structure of a ternary complex of Set9 with a p53 peptide and the cofactor product S-adenosyl-L-homocysteine (AdoHcy) provides the molecular basis for recognition of p53 by this lysine methyltransferase.
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