Structural highlights
2ddg is a 3 chain structure with sequence from Thet8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , , , , |
| Related: | |
| Gene: | ttUDGB (THET8) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN |
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Uracil-DNA glycosylase (UDG) removes uracil generated by the deamination of cytosine or misincorporation of deoxyuridine monophosphate. Within the UDG superfamily, a fifth UDG family lacks a polar residue in the active-site motif, which mediates the hydrolysis of the glycosidic bond by activation of a water molecule in UDG families 1-4. We have determined the crystal structure of a novel family 5 UDG from Thermus thermophilus HB8 complexed with DNA containing an abasic site. The active-site structure suggests this enzyme uses both steric force and water activation for its excision reaction. A conserved asparagine residue acts as a ligand to the catalytic water molecule. The structure also implies that another water molecule acts as a barrier during substrate recognition. Based on no significant open-closed conformational change upon binding to DNA, we propose a "slide-in" mechanism for initial damage recognition.
Crystal structure of family 5 uracil-DNA glycosylase bound to DNA.,Kosaka H, Hoseki J, Nakagawa N, Kuramitsu S, Masui R J Mol Biol. 2007 Nov 2;373(4):839-50. Epub 2007 Aug 21. PMID:17870091[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Kosaka H, Hoseki J, Nakagawa N, Kuramitsu S, Masui R. Crystal structure of family 5 uracil-DNA glycosylase bound to DNA. J Mol Biol. 2007 Nov 2;373(4):839-50. Epub 2007 Aug 21. PMID:17870091 doi:10.1016/j.jmb.2007.08.022
