Cytosolic uridine-cytidine kinase 1 (UCK1) catalyzes the reactions of cytidine or uridine with ATP to form CMP or UMP and ADP (Greenberg et al. 1977; Van Rompay et al. 2001). Unpublished crystallographic data show the enzyme to be a tetramer (PDB - 2JEO).
Van Rompay, AR, Norda, A, Linden, K, Johansson, M, Karlsson, A
Greenberg, N, Schumm, DE, Webb, TE
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