Involved in urease metallocenter assembly. Binds nickel. Probably functions as a nickel donor during metallocenter assembly (By similarity). Required for maturation of urease via the functional incorporation of the urease nickel metallocenter. UreD, UreF and UreG form a complex that acts as a GTP-hydrolysis-dependent molecular chaperone, activating the urease apoprotein by helping to assemble the nickel containing metallocenter of UreC. The UreE protein probably delivers the nickel (By similarity). In the N-terminal section; belongs to the UreE family. In the C-terminal section; belongs to the UreF family.