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| | <StructureSection load='1zmx' size='340' side='right'caption='[[1zmx]], [[Resolution|resolution]] 3.10Å' scene=''> | | <StructureSection load='1zmx' size='340' side='right'caption='[[1zmx]], [[Resolution|resolution]] 3.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1zmx]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Drome Drome]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZMX OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1ZMX FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1zmx]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Drome Drome]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZMX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZMX FirstGlance]. <br> |
| | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=THM:THYMIDINE'>THM</scene></td></tr> | | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=THM:THYMIDINE'>THM</scene></td></tr> |
| | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1j90|1j90]], [[1ot3|1ot3]], [[1oe0|1oe0]], [[1zm7|1zm7]]</div></td></tr> | | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1j90|1j90]], [[1ot3|1ot3]], [[1oe0|1oe0]], [[1zm7|1zm7]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dnk ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=7227 DROME])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dnk ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=7227 DROME])</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Deoxynucleoside_kinase Deoxynucleoside kinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.145 2.7.1.145] </span></td></tr> | + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Deoxynucleoside_kinase Deoxynucleoside kinase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.145 2.7.1.145] </span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1zmx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zmx OCA], [http://pdbe.org/1zmx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zmx RCSB], [http://www.ebi.ac.uk/pdbsum/1zmx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1zmx 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=1zmx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zmx OCA], [https://pdbe.org/1zmx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zmx RCSB], [https://www.ebi.ac.uk/pdbsum/1zmx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zmx ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/DNK_DROME DNK_DROME]] Deoxyribonucleoside kinase that has a broad specificity phosphorylating thymidine, deoxyadenosine, deoxycytidine and deoxyguanosine. Specificity is higher for pyrimidine nucleosides. Several anti-viral and anti-cancer nucleoside analogs are also efficiently phosphorylated.<ref>PMID:10446143</ref> <ref>PMID:10692477</ref> <ref>PMID:16008571</ref> | + | [[https://www.uniprot.org/uniprot/DNK_DROME DNK_DROME]] Deoxyribonucleoside kinase that has a broad specificity phosphorylating thymidine, deoxyadenosine, deoxycytidine and deoxyguanosine. Specificity is higher for pyrimidine nucleosides. Several anti-viral and anti-cancer nucleoside analogs are also efficiently phosphorylated.<ref>PMID:10446143</ref> <ref>PMID:10692477</ref> <ref>PMID:16008571</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| Structural highlights
Function
[DNK_DROME] Deoxyribonucleoside kinase that has a broad specificity phosphorylating thymidine, deoxyadenosine, deoxycytidine and deoxyguanosine. Specificity is higher for pyrimidine nucleosides. Several anti-viral and anti-cancer nucleoside analogs are also efficiently phosphorylated.[1] [2] [3]
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
The Drosophila melanogaster deoxyribonucleoside kinase (Dm-dNK) double mutant N45D/N64D was identified during a previous directed evolution study. This mutant enzyme had a decreased activity towards the natural substrates and decreased feedback inhibition with dTTP, whereas the activity with 3'-modified nucleoside analogs like 3'-azidothymidine (AZT) was nearly unchanged. Here, we identify the mutation N64D as being responsible for these changes. Furthermore, we crystallized the mutant enzyme in the presence of one of its substrates, thymidine, and the feedback inhibitor, dTTP. The introduction of the charged Asp residue appears to destabilize the LID region (residues 167-176) of the enzyme by electrostatic repulsion and no hydrogen bond to the 3'-OH is made in the substrate complex by Glu172 of the LID region. This provides a binding space for more bulky 3'-substituents like the azido group in AZT but influences negatively the interactions between Dm-dNK, substrates and feedback inhibitors based on deoxyribose. The detailed picture of the structure-function relationship provides an improved background for future development of novel mutant suicide genes for Dm-dNK-mediated gene therapy.
Structural basis for the changed substrate specificity of Drosophila melanogaster deoxyribonucleoside kinase mutant N64D.,Welin M, Skovgaard T, Knecht W, Zhu C, Berenstein D, Munch-Petersen B, Piskur J, Eklund H FEBS J. 2005 Jul;272(14):3733-42. PMID:16008571[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Johansson M, van Rompay AR, Degreve B, Balzarini J, Karlsson A. Cloning and characterization of the multisubstrate deoxyribonucleoside kinase of Drosophila melanogaster. J Biol Chem. 1999 Aug 20;274(34):23814-9. PMID:10446143
- ↑ Munch-Petersen B, Knecht W, Lenz C, Sondergaard L, Piskur J. Functional expression of a multisubstrate deoxyribonucleoside kinase from Drosophila melanogaster and its C-terminal deletion mutants. J Biol Chem. 2000 Mar 3;275(9):6673-9. PMID:10692477
- ↑ Welin M, Skovgaard T, Knecht W, Zhu C, Berenstein D, Munch-Petersen B, Piskur J, Eklund H. Structural basis for the changed substrate specificity of Drosophila melanogaster deoxyribonucleoside kinase mutant N64D. FEBS J. 2005 Jul;272(14):3733-42. PMID:16008571 doi:10.1111/j.1742-4658.2005.04803.x
- ↑ Welin M, Skovgaard T, Knecht W, Zhu C, Berenstein D, Munch-Petersen B, Piskur J, Eklund H. Structural basis for the changed substrate specificity of Drosophila melanogaster deoxyribonucleoside kinase mutant N64D. FEBS J. 2005 Jul;272(14):3733-42. PMID:16008571 doi:10.1111/j.1742-4658.2005.04803.x
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