Nucleoside Binding Site of Herpes Simplex Type 1 Thymidine Kinase Analyzed by X-Ray CrystallographyVogt, J., Perozzo, R., Pautsch, A., Prota, A., Schelling, P., Pilger, B., Folkers, G., Scapozza, L., Schulz, G.E.
(2000) Proteins: Struct.,Funct., Genet. 41: 545
- PubMed: 11056041
- Primary Citation of Related Structures:  1E2I, 1E2J
- Also Cited By: 3F0T, 3RDP
- PubMed Abstract:
- The Three-Dimensional Structure of Thymidine Kinase from Herpes Simplex Virus Type 1
Wild, K.,Bohner, T.,Aubry, A.,Folkers, G.,Schulz, G.E.
(1995) FEBS Lett. 368: 289
- Crystal Structures of the Thymidine Kinase from Herpes Simplex Virus Type-1 in Complex with Deoxythymidine and Ganciclovir
Brown, D.G.,Visse, R.,Sandhu, G.,Davies, A.,Rizkallah, P.J.,Melitz, C.,Summers, W.C.,Sanderson, M.R.
(1995) Nat.Struct.Mol.Biol. 2: 876
The crystal structures of the full-length Herpes simplex virus type 1 thymidine kinase in its unligated form and in a complex with an adenine analogue have been determined at 1.9 A resolution. The unligated enzyme contains four water molecules in the ...
The crystal structures of the full-length Herpes simplex virus type 1 thymidine kinase in its unligated form and in a complex with an adenine analogue have been determined at 1.9 A resolution. The unligated enzyme contains four water molecules in the thymidine pocket and reveals a small induced fit on substrate binding. The structure of the ligated enzyme shows for the first time a bound adenine analogue after numerous complexes with thymine and guanine analogues have been reported. The adenine analogue constitutes a new lead compound for enzyme-prodrug gene therapy. In addition, the structure of mutant Q125N modifying the binding site of the natural substrate thymidine in complex with this substrate has been established at 2.5 A resolution. It reveals that neither the binding mode of thymidine nor the polypeptide backbone conformation is altered, except that the two major hydrogen bonds to thymidine are replaced by a single water-mediated hydrogen bond, which improves the relative acceptance of the prodrugs aciclovir and ganciclovir compared with the natural substrate. Accordingly, the mutant structure represents a first step toward improving the virus-directed enzyme-prodrug gene therapy by enzyme engineering.
Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Freiburg im Breisgau, Germany.