We have revealed that the structural, surface, redox and binding properties of EcDsbA, SeDsbA and KpDsbA enzymes are extremely conserved, and that these three DsbAs and 4 other DsbAs (from Enterobacter cloacae, Citrobacter koseri, Shigella flexneri and Cronobacter sakazakii) might be regarded an Enterobacteriaceae subclass of DsbA. Carbapenem-resistant Enterobacteriaceae are accountable for a big