4pwu is a 4 chain structure with sequence from Klep7. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
[MZRA_KLEP7] Modulates the activity of the EnvZ/OmpR two-component regulatory system, probably by directly modulating EnvZ enzymatic activity and increasing stability of phosphorylated OmpR (By similarity).