Protein-arginine kinase

UniProtKB accession:  P0DMM5

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UniProtKB description:  Catalyzes the specific phosphorylation of arginine residues in a large number of proteins. Is part of the bacterial stress response system, where it is involved in regulating the global heat shock repressor CtsR; phosphorylates arginine residues in the winged helix-turn-helix domain of CtsR, thereby preventing its binding to DNA and consequently inducing the expression of repressed genes. Protein arginine phosphorylation has a physiologically important role and is involved in the regulation of many critical cellular processes, such as protein homeostasis, motility, competence, and stringent and stress responses, by regulating gene expression and protein activity. Acts exclusively on Arg residues, since it cannot phosphorylate Tyr, Ser, Thr, His, Asp and Lys. Has no free arginine kinase activity.