Bacterial pathogens can modify host cell proteins and interfere with their function. For example, bacterial enzymes can adenylylate Rho GTPases, inhibiting their interaction with downstream effectors. Now the crystal structure of the Fic domain from Histophilus somni adenylyltransferase IbpA in complex with target Cdc42 reveals the basis for their tight interaction and for Cdc42 modification.
- Junyu Xiao
- Carolyn A Worby
- Jack E Dixon