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| - | ==LEISHMANIA MAJOR PTERIDINE REDUCTASE 1 IN COMPLEX WITH NADP AND BIOPTERIN== | + | |
| - | <StructureSection load='2bf7' size='340' side='right' caption='[[2bf7]], [[Resolution|resolution]] 2.40Å' scene=''> | + | ==Leishmania major pteridine reductase 1 in complex with NADP and biopterin== |
| | + | <StructureSection load='2bf7' size='340' side='right'caption='[[2bf7]], [[Resolution|resolution]] 2.40Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2bf7]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Leima Leima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BF7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2BF7 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2bf7]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Leishmania_major Leishmania major]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2BF7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2BF7 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=HBI:7,8-DIHYDROBIOPTERIN'>HBI</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.4Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1e7w|1e7w]], [[1e92|1e92]], [[1w0c|1w0c]], [[2bfa|2bfa]], [[2bfm|2bfm]], [[2bfo|2bfo]], [[2bfp|2bfp]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=HBI:7,8-DIHYDROBIOPTERIN'>HBI</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Pteridine_reductase Pteridine reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.5.1.33 1.5.1.33] </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=2bf7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bf7 OCA], [https://pdbe.org/2bf7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2bf7 RCSB], [https://www.ebi.ac.uk/pdbsum/2bf7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2bf7 ProSAT]</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=2bf7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bf7 OCA], [http://pdbe.org/2bf7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2bf7 RCSB], [http://www.ebi.ac.uk/pdbsum/2bf7 PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/PTR1_LEIMA PTR1_LEIMA]] Exhibits a NADPH-dependent biopterin reductase activity. Has good activity with folate and significant activity with dihydrofolate and dihydrobiopterin, but not with quinonoid dihydrobiopterin. Confers resistance to methotrexate (MTX).<ref>PMID:7972081</ref> | + | [https://www.uniprot.org/uniprot/PTR1_LEIMA PTR1_LEIMA] Exhibits a NADPH-dependent biopterin reductase activity. Has good activity with folate and significant activity with dihydrofolate and dihydrobiopterin, but not with quinonoid dihydrobiopterin. Confers resistance to methotrexate (MTX).<ref>PMID:7972081</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
| | Check<jmol> | | Check<jmol> |
| | <jmolCheckbox> | | <jmolCheckbox> |
| - | <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bf/2bf7_consurf.spt"</scriptWhenChecked> | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/bf/2bf7_consurf.spt"</scriptWhenChecked> |
| | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| | <text>to colour the structure by Evolutionary Conservation</text> | | <text>to colour the structure by Evolutionary Conservation</text> |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Leima]] | + | [[Category: Large Structures]] |
| - | [[Category: Pteridine reductase]] | + | [[Category: Leishmania major]] |
| - | [[Category: Hunter, W N]] | + | [[Category: Hunter WN]] |
| - | [[Category: Schuettelkopf, A W]] | + | [[Category: Schuettelkopf AW]] |
| - | [[Category: Drug resistance]]
| + | |
| - | [[Category: Methotrexate resistance]]
| + | |
| - | [[Category: Nadp]]
| + | |
| - | [[Category: Oxidoreductase]]
| + | |
| - | [[Category: Pterin]]
| + | |
| - | [[Category: Salvage]]
| + | |
| - | [[Category: Short-chain dehydrogenase/reductase]]
| + | |
| - | [[Category: Trypanosomatid]]
| + | |
| Structural highlights
Function
PTR1_LEIMA Exhibits a NADPH-dependent biopterin reductase activity. Has good activity with folate and significant activity with dihydrofolate and dihydrobiopterin, but not with quinonoid dihydrobiopterin. Confers resistance to methotrexate (MTX).[1]
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
Pteridine reductase (PTR1) is an NADPH-dependent short-chain reductase found in parasitic trypanosomatid protozoans. The enzyme participates in the salvage of pterins and represents a target for the development of improved therapies for infections caused by these parasites. A series of crystallographic analyses of Leishmania major PTR1 are reported. Structures of the enzyme in a binary complex with the cofactor NADPH, and ternary complexes with cofactor and biopterin, 5,6-dihydrobiopterin, and 5,6,7,8-tetrahydrobiopterin reveal that PTR1 does not undergo any major conformational changes to accomplish binding and processing of substrates, and confirm that these molecules bind in a single orientation at the catalytic center suitable for two distinct reductions. Ternary complexes with cofactor and CB3717 and trimethoprim (TOP), potent inhibitors of thymidylate synthase and dihydrofolate reductase, respectively, have been characterized. The structure with CB3717 reveals that the quinazoline moiety binds in similar fashion to the pterin substrates/products and dominates interactions with the enzyme. In the complex with TOP, steric restrictions enforced on the trimethoxyphenyl substituent prevent the 2,4-diaminopyrimidine moiety from adopting the pterin mode of binding observed in dihydrofolate reductase, and explain the inhibition properties of a range of pyrimidine derivates. The molecular detail provided by these complex structures identifies the important interactions necessary to assist the structure-based development of novel enzyme inhibitors of potential therapeutic value.
Structures of Leishmania major pteridine reductase complexes reveal the active site features important for ligand binding and to guide inhibitor design.,Schuttelkopf AW, Hardy LW, Beverley SM, Hunter WN J Mol Biol. 2005 Sep 9;352(1):105-16. PMID:16055151[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Bello AR, Nare B, Freedman D, Hardy L, Beverley SM. PTR1: a reductase mediating salvage of oxidized pteridines and methotrexate resistance in the protozoan parasite Leishmania major. Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11442-6. PMID:7972081
- ↑ Schuttelkopf AW, Hardy LW, Beverley SM, Hunter WN. Structures of Leishmania major pteridine reductase complexes reveal the active site features important for ligand binding and to guide inhibitor design. J Mol Biol. 2005 Sep 9;352(1):105-16. PMID:16055151 doi:http://dx.doi.org/10.1016/j.jmb.2005.06.076
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