UreD is a urease accessory protein. Urease Pfam:PF00449 hydrolyses urea into ammonia and carbamic acid [2]. UreD is involved in activation of the urease enzyme via the UreD-UreF-UreG-urease complex [1] and is required for urease nickel metallocenter assembly [3]. See also UreF Pfam:PF01730, UreG Pfam:PF01495.

1: Characterization of UreG, identification of a UreD-UreF-UreG complex, and evidence suggesting that a nucleotide-binding site in UreG is required for in vivo metallocenter assembly of Klebsiella aerogenes urease. Moncrief MB, Hausinger RP; J Bacteriol 1997;179:4081-4086. PMID:9209019

2: Organization of Ureaplasma urealyticum urease gene cluster and expression in a suppressor strain of Escherichia coli. Neyrolles O, Ferris S, Behbahani N, Montagnier L, Blanchard A; J Bacteriol 1996;178:647-655. PMID:8550495

3: In vitro activation of urease apoprotein and role of UreD as a chaperone required for nickel metallocenter assembly. Park IS, Carr MB, Hausinger RP; Proc Natl Acad Sci U S A 1994;91:3233-3237. PMID:7909161