Protein Kinase Specificity: A Strategic Collaboration between Kinase Peptide Specificity and Substrate Recruitment

Substrate specificity of protein kinase C inhibitors.

In the August issue of TiPS, Epand and Lester analysed the effect of the physicochemical properties of the membrane on protein kinase C activity. In addition to those substrates discussed that require the presence of Ca2+ and phospholipids, other substrates can be phosphorylated in the absence of these activators. It is possible that this differential substrate requirement could be exploited ph...

Substrate specificity and activity regulation of protein kinase MELK.

Maternal embryonic leucine zipper kinase (MELK) is a protein Ser/Thr kinase that has been implicated in stem cell renewal, cell cycle progression, and pre-mRNA splicing, but its substrates and regulation are not yet known. We show here that MELK has a rather broad substrate specificity and does not appear to require a specific sequence surrounding its (auto)phosphorylation sites. We have mapped...

Reprogramming protein kinase substrate specificity through synthetic mutations

Mechanisms of Yersinia YopO kinase substrate specificity

Yersinia bacteria cause a range of human diseases, including yersiniosis, Far East scarlet-like fever and the plague. Yersiniae modulate and evade host immune defences through injection of Yersinia outer proteins (Yops) into phagocytic cells. One of the Yops, YopO (also known as YpkA) obstructs phagocytosis through disrupting actin filament regulation processes - inhibiting polymerization-promo...

Rat adrenocortical carcinoma 494 autophosphorylating protein kinase, autophosphorylating protein kinase 500. Purification, biochemical and immunological characterization, and substrate specificity.

A novel autophosphorylating protein kinase, autophosphorylating protein kinase 500, independent of cyclic AMP, cyclic GMP, calcium, and calmodulin was purified from rat adrenocortical carcinoma 494 by ammonium sulfate fractionation followed by the chromatographic steps of DEAE-cellulose, gel filtration, cyclic AMP-epoxy Sepharose, and phosphocellulose. Sometimes two additional chromatographic p...