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serine/threonine-protein kinases similar to HipA and CtkA This family contains serine/threonine-protein kinases similar to Escherichia coli HipA, a type II toxin-antitoxin (TA) system HipA family toxin that phosphorylates Glu-tRNA-ligase (GltX), preventing it from being charged, leading to an increase in uncharged tRNA(Glu), and is the toxin component of the HipA-HipB TA module, as well as similar to the Helicobacter pylori serine/threonine-protein kinase CtkA (proinflammatory kinase), which has been shown to be secreted by the bacteria and to induce cytokines in gastric epithelial cells relevant to chronic gastric inflammation.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",