Abstract
Human deoxycytidine kinase (dCK) is involved in the nucleotide-biosynthesis salvage pathway and has also been shown to phosphorylate several antitumor and antiviral prodrugs. The structures of dCK alone and the dead-end complex of dCK with substrate nucleoside and product ADP or UDP have previously been reported; however, there is currently no structure available for a substrate or product complex. Here, the structures of dCK complexes with the products dCMP, UDP and Mg2+ ion, and with dAMP, UDP and Mg2+ ion are reported. Structural comparisons show that the product complexes with UDP and a dead-end complex with substrate and UDP have similar active-site conformations.
Publication types
-
Research Support, N.I.H., Extramural
-
Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
-
Crystallography, X-Ray
-
Deoxycytidine Kinase / chemistry*
-
Deoxycytidine Kinase / genetics
-
Deoxycytidine Kinase / metabolism
-
Deoxycytidine Monophosphate / chemistry*
-
Deoxycytidine Monophosphate / genetics
-
Deoxycytidine Monophosphate / metabolism
-
Humans
-
Models, Molecular
-
Multiprotein Complexes / chemistry*
-
Protein Conformation
-
Recombinant Proteins / chemistry*
-
Recombinant Proteins / genetics
-
Recombinant Proteins / metabolism
-
Structure-Activity Relationship
-
Substrate Specificity
-
Uridine Diphosphate / chemistry*
-
Uridine Diphosphate / genetics
-
Uridine Diphosphate / metabolism
Substances
-
Multiprotein Complexes
-
Recombinant Proteins
-
Deoxycytidine Monophosphate
-
Uridine Diphosphate
-
Deoxycytidine Kinase