Probably acts in the maturation of urease via the functional incorporation of the urease nickel metallocenter (By similarity). Required for urease expression. 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 urea and nitrogen starvation. Cells are urease negative and are no longer able to transport urea. Belongs to the UreD family.