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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...
Surface plasmon resonance analysis shows that the carboxy-terminal domain of Grp94 (Grp94-CT, residues 518-803) physically interacts with the catalytic subunit of protein kinase CK2 (CK2α) under non-stressed conditions. A K D of 4x10 -7 was determined for this binding. Heparin competed with Grp94-CT for binding to CK2α. CK2β also inhibited the binding of Grp94-CT to CK2α, and...
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