Published on Aug. 14, 2003 in FEBS Lett volume 549.

PubMed ID: 12914926


Abstract:

Yeast piD261/Bud32 belongs to the piD261 family of atypical protein kinases structurally conserved, from Archaea to human. The disruption of its gene is causative of severely defective growth. Its human homologue, PRPK, interacts with and phosphorylates the oncosuppressor p53 protein, which is lacking in yeast. Here we show that on one hand piD261/Bud32 interacts with and phosphorylates human p53 in vitro, on the other hand PRPK can partially complement the phenotype of yeast lacking the gene encoding piD261/Bud32. These data indicate that, despite considerable structural divergence, members of the piD261 family from distantly related organisms display a remarkable functional conservation.


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