|
|
| Line 3: |
Line 3: |
| | <StructureSection load='4skn' size='340' side='right'caption='[[4skn]], [[Resolution|resolution]] 2.90Å' scene=''> | | <StructureSection load='4skn' size='340' side='right'caption='[[4skn]], [[Resolution|resolution]] 2.90Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4skn]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4SKN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4SKN FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4skn]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4SKN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4SKN FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=URA:URACIL'>URA</scene>, <scene name='pdbligand=ORP:2-DEOXY-5-PHOSPHONO-RIBOSE'>ORP</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=URA:URACIL'>URA</scene>, <scene name='pdbligand=ORP:2-DEOXY-5-PHOSPHONO-RIBOSE'>ORP</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Uridine_nucleosidase Uridine nucleosidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.3 3.2.2.3] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Uridine_nucleosidase Uridine nucleosidase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.2.3 3.2.2.3] </span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4skn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4skn OCA], [http://pdbe.org/4skn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4skn RCSB], [http://www.ebi.ac.uk/pdbsum/4skn PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4skn ProSAT]</span></td></tr> | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4skn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4skn OCA], [https://pdbe.org/4skn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4skn RCSB], [https://www.ebi.ac.uk/pdbsum/4skn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4skn ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Disease == | | == Disease == |
| - | [[http://www.uniprot.org/uniprot/UNG_HUMAN UNG_HUMAN]] Defects in UNG are a cause of immunodeficiency with hyper-IgM type 5 (HIGM5) [MIM:[http://omim.org/entry/608106 608106]]. A rare immunodeficiency syndrome characterized by normal or elevated serum IgM levels with absence of IgG, IgA, and IgE. It results in a profound susceptibility to bacterial infections.<ref>PMID:12958596</ref> <ref>PMID:15967827</ref> | + | [[https://www.uniprot.org/uniprot/UNG_HUMAN UNG_HUMAN]] Defects in UNG are a cause of immunodeficiency with hyper-IgM type 5 (HIGM5) [MIM:[https://omim.org/entry/608106 608106]]. A rare immunodeficiency syndrome characterized by normal or elevated serum IgM levels with absence of IgG, IgA, and IgE. It results in a profound susceptibility to bacterial infections.<ref>PMID:12958596</ref> <ref>PMID:15967827</ref> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/UNG_HUMAN UNG_HUMAN]] Excises uracil residues from the DNA which can arise as a result of misincorporation of dUMP residues by DNA polymerase or due to deamination of cytosine. | + | [[https://www.uniprot.org/uniprot/UNG_HUMAN UNG_HUMAN]] Excises uracil residues from the DNA which can arise as a result of misincorporation of dUMP residues by DNA polymerase or due to deamination of cytosine. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| Line 33: |
Line 33: |
| | | | |
| | ==See Also== | | ==See Also== |
| - | *[[DNA glycosylase|DNA glycosylase]] | + | *[[DNA glycosylase 3D structures|DNA glycosylase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| Structural highlights
Disease
[UNG_HUMAN] Defects in UNG are a cause of immunodeficiency with hyper-IgM type 5 (HIGM5) [MIM:608106]. A rare immunodeficiency syndrome characterized by normal or elevated serum IgM levels with absence of IgG, IgA, and IgE. It results in a profound susceptibility to bacterial infections.[1] [2]
Function
[UNG_HUMAN] Excises uracil residues from the DNA which can arise as a result of misincorporation of dUMP residues by DNA polymerase or due to deamination of cytosine.
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
Any uracil bases in DNA, a result of either misincorporation or deamination of cytosine, are removed by uracil-DNA glycosylase (UDG), one of the most efficient and specific of the base-excision DNA-repair enzymes. Crystal structures of human and viral UDGs complexed with free uracil have indicated that the enzyme binds an extrahelical uracil. Such binding of undamaged extrahelical bases has been seen in the structures of two bacterial methyltransferases and bacteriophage T4 endonuclease V. Here we characterize the DNA binding and kinetics of several engineered human UDG mutants and present the crystal structure of one of these, which to our knowledge represents the first structure of any eukaryotic DNA repair enzyme in complex with its damaged, target DNA. Electrostatic orientation along the UDG active site, insertion of an amino acid (residue 272) into the DNA through the minor groove, and compression of the DNA backbone flanking the uracil all result in the flipping-out of the damaged base from the DNA major groove, allowing specific recognition of its phosphate, deoxyribose and uracil moieties. Our structure thus provides a view of a productive complex specific for cleavage of uracil from DNA and also reveals the basis for the enzyme-assisted nucleotide flipping by this critical DNA-repair enzyme.
A nucleotide-flipping mechanism from the structure of human uracil-DNA glycosylase bound to DNA.,Slupphaug G, Mol CD, Kavli B, Arvai AS, Krokan HE, Tainer JA Nature. 1996 Nov 7;384(6604):87-92. PMID:8900285[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Imai K, Slupphaug G, Lee WI, Revy P, Nonoyama S, Catalan N, Yel L, Forveille M, Kavli B, Krokan HE, Ochs HD, Fischer A, Durandy A. Human uracil-DNA glycosylase deficiency associated with profoundly impaired immunoglobulin class-switch recombination. Nat Immunol. 2003 Oct;4(10):1023-8. Epub 2003 Sep 7. PMID:12958596 doi:http://dx.doi.org/10.1038/ni974
- ↑ Kavli B, Andersen S, Otterlei M, Liabakk NB, Imai K, Fischer A, Durandy A, Krokan HE, Slupphaug G. B cells from hyper-IgM patients carrying UNG mutations lack ability to remove uracil from ssDNA and have elevated genomic uracil. J Exp Med. 2005 Jun 20;201(12):2011-21. PMID:15967827 doi:10.1084/jem.20050042
- ↑ Slupphaug G, Mol CD, Kavli B, Arvai AS, Krokan HE, Tainer JA. A nucleotide-flipping mechanism from the structure of human uracil-DNA glycosylase bound to DNA. Nature. 1996 Nov 7;384(6604):87-92. PMID:8900285 doi:http://dx.doi.org/10.1038/384087a0
|
