:Zinc D-Ala-D-Ala carboxypeptidase

{{Infobox enzyme

| Name = Zinc D-Ala-D-Ala carboxypeptidase

| EC_number = 3.4.17.14

| CAS_number = 213189-85-6

| GO_code =

| image =

| width =

| caption =

}}

Zinc D-Ala-D-Ala carboxypeptidase ({{EC number|3.4.17.14}}, Zn²⁺ G peptidase, D-alanyl-D-alanine hydrolase, D-alanyl-D-alanine-cleaving carboxypeptidase, DD-carboxypeptidase, G enzyme, DD-carboxypeptidase-transpeptidase) is an enzyme.{{cite journal | vauthors = Dideberg O, Charlier P, Dive G, Joris B, Frère JM, Ghuysen JM | title = Structure of a Zn2+-containing D-alanyl-D-alanine-cleaving carboxypeptidase at 2.5 A resolution | journal = Nature | volume = 299 | issue = 5882 | pages = 469–70 | date = September 1982 | pmid = 7121588 | doi = 10.1038/299469a0 | url = http://orbi.ulg.ac.be/handle/2268/77995 | url-access = subscription }}{{cite journal | vauthors = Joris B, Van Beeumen J, Casagrande F, Gerday C, Frère JM, Ghuysen JM | title = The complete amino acid sequence of the Zn2+-containing D-alanyl-D-alanine-cleaving carboxypeptidase of streptomyces albus G | journal = European Journal of Biochemistry | volume = 130 | issue = 1 | pages = 53–69 | date = January 1983 | pmid = 6825689 | doi = 10.1111/j.1432-1033.1983.tb07116.x | url = http://orbi.ulg.ac.be/handle/2268/83018 | doi-access = free }}{{cite journal | vauthors = Ghuysen JM, Frère JM, Leyh-Bouille M, Nguyen-Distèche M, Coyette J, Dusart J, Joris B, Duez C, Dideberg O, Charlier P | title = Bacterial wall peptidoglycan, DD-peptidases and beta-lactam antibiotics | journal = Scandinavian Journal of Infectious Diseases. Supplementum | volume = 42 | pages = 17–37 | year = 1984 | pmid = 6597561 }} This enzyme catalyses the following chemical reaction

: Cleavage of the bond: (Ac)2-L-lysyl-D-alanyl--D-alanine

This is a zinc enzyme. Catalyses carboxypeptidation but not transpeptidation reactions involved in bacterial cell wall metabolism.