Legionella effector LnaB, a recently identified actin-activated AMPylase, mediates phosphoryl-AMPylation in a yet-unknown manner. Here the authors unveil a two-step catalytic process involving dual ATPase–AMPylase activity based on structural studies, providing a biochemical basis for AMPylation.
- Tao-Tao Chen
- Qiuhua Lu
- Songying Ouyang