This family represents the homodimeric form of cytidine deaminase, a zinc metalloprotein found in Escherichia coli [1] and in Arabidopsis thaliana (Mouse-ear cress). A related, homotetrameric form with a much smaller subunit is found most bacteria and in animals, IPR006262. Both types may act on deoxycytidine as well as cytidine.
Carlow DC, Carter CW Jr, Mejlhede N, Neuhard J, Wolfenden R.
Cytidine deaminases from B. subtilis and E. coli: compensating effects of changing zinc coordination and quaternary structure.
Biochemistry 38 12258-65 1999
[PubMed: 10493793] http://dx.doi.org/10.1021/bi990819t
Xiang S, Short SA, Wolfenden R, Carter CW Jr.
The structure of the cytidine deaminase-product complex provides evidence for efficient proton transfer and ground-state destabilization.
Biochemistry 36 1997 4768-74
[PubMed: 9125497] http://dx.doi.org/10.1021/bi963091e
Xiang S, Short SA, Wolfenden R, Carter CW Jr.
Cytidine deaminase complexed to 3-deazacytidine: a "valence buffer" in zinc enzyme catalysis.
Biochemistry 35 1996 1335-41
[PubMed: 8634261] http://dx.doi.org/10.1021/bi9525583
Xiang S, Short SA, Wolfenden R, Carter CW Jr.
Transition-state selectivity for a single hydroxyl group during catalysis by cytidine deaminase.
Biochemistry 34 1995 4516-23
[PubMed: 7718553] http://dx.doi.org/10.1021/bi00014a003