Legionella pneumophila encodes a family of phosphoribosyl ubiquitination ligases (SidE) essential for the bacterium to establish successful infection. Four independent studies now show that the SidE family of ubiquitin ligases are regulated by a novel mechanism of glutamylation via a pseudokinase-like Legionella effector, SidJ, in an ATP- and calmodulin-dependent manner.
Keywords: SdeA; SidE; SidJ; calmodulin; phosphoribosyl ubiquitination; post-translational modification.
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