Crystal structure of human uracil-DNA glycosylase in complex with a protein inhibitor: protein mimicry of DNA.Mol, C.D., Arvai, A.S., Sanderson, R.J., Slupphaug, G., Kavli, B., Krokan, H.E., Mosbaugh, D.W., Tainer, J.A.
(1995) Cell 82: 701-708
- PubMed: 7671300
- PubMed Abstract:
- A nucleotide-flipping mechanism from the structure of human uracil-DNA glycosylase bound to DNA.
Slupphaug, G.,Mol, C.D.,Kavli, B.,Arvai, A.S.,Krokan, H.E.,Tainer, J.A.
(1996) Nature 384: 87
- Protein mimicry of DNA from crystal structures of the uracil-DNA glycosylase inhibitor protein and its complex with Escherichia coli uracil-DNA glycosylase.
Putnam, C.D.,Shroyer, M.J.,Lundquist, A.J.,Mol, C.D.,Arvai, A.S.,Mosbaugh, D.W.,Tainer, J.A.
(1999) J.Mol.Biol. 287: 331
- Crystal structure and mutational analysis of human uracil-DNA glycosylase: structural basis for specificity and catalysis.
Mol, C.D.,Arvai, A.S.,Slupphaug, G.,Kavli, B.,Alseth, I.,Krokan, H.E.,Tainer, J.A.
(1995) Cell 80: 869
- Base excision repair initiation revealed by crystal structures and binding kinetics of human uracil-DNA glycosylase with DNA.
Parikh, S.S.,Mol, C.D.,Slupphaug, G.,Bharati, S.,Krokan, H.E.,Tainer, J.A.
(1998) Embo J. 17: 5214
Uracil-DNA glycosylase inhibitor (Ugi) is a B. subtilis bacteriophage protein that protects the uracil-containing phage DNA by irreversibly inhibiting the key DNA repair enzyme uracil-DNA glycosylase (UDG). The 1.9 A crystal structure of Ugi complexe ...
Uracil-DNA glycosylase inhibitor (Ugi) is a B. subtilis bacteriophage protein that protects the uracil-containing phage DNA by irreversibly inhibiting the key DNA repair enzyme uracil-DNA glycosylase (UDG). The 1.9 A crystal structure of Ugi complexed to human UDG reveals that the Ugi structure, consisting of a twisted five-stranded antiparallel beta sheet and two alpha helices, binds by inserting a beta strand into the conserved DNA-binding groove of the enzyme without contacting the uracil specificity pocket. The resulting interface, which buries over 1200 A2 on Ugi and involves the entire beta sheet and an alpha helix, is polar and contains 22 water molecules. Ugi binds the sequence-conserved DNA-binding groove of UDG via shape and electrostatic complementarity, specific charged hydrogen bonds, and hydrophobic packing enveloping Leu-272 from a protruding UDG loop. The apparent mimicry by Ugi of DNA interactions with UDG provides both a structural mechanism for UDG binding to DNA, including the enzyme-assisted expulsion of uracil from the DNA helix, and a crystallographic basis for the design of inhibitors with scientific and therapeutic applications.
Department of Molecular Biology, Scripps Research Institute, La Jolla, California 92037, USA.