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| ==Crystal Structure of Fe(II)-HppE with alternative substrate (R)-1-HPP== | | ==Crystal Structure of Fe(II)-HppE with alternative substrate (R)-1-HPP== |
| <StructureSection load='4j1w' size='340' side='right' caption='[[4j1w]], [[Resolution|resolution]] 2.72Å' scene=''> | | <StructureSection load='4j1w' size='340' side='right'caption='[[4j1w]], [[Resolution|resolution]] 2.72Å' scene=''> |
| == Structural highlights == | | == Structural highlights == |
| <table><tr><td colspan='2'>[[4j1w]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"actinomyces_wedmorensis"_milard_and_burr_1926 "actinomyces wedmorensis" milard and burr 1926]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4J1W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4J1W FirstGlance]. <br> | | <table><tr><td colspan='2'>[[4j1w]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_wedmorensis Streptomyces wedmorensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4J1W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4J1W FirstGlance]. <br> |
| </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=FFQ:[(1R)-1-HYDROXYPROPYL]PHOSPHONIC+ACID'>FFQ</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</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]] 2.72Å</td></tr> |
| <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4j1x|4j1x]], [[3scf|3scf]], [[3scg|3scg]], [[1zz8|1zz8]], [[1zz7|1zz7]]</td></tr>
| | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=FFQ:[(1R)-1-HYDROXYPROPYL]PHOSPHONIC+ACID'>FFQ</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> |
| <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">fom4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=43759 "Actinomyces wedmorensis" Milard and Burr 1926])</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=4j1w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4j1w OCA], [https://pdbe.org/4j1w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4j1w RCSB], [https://www.ebi.ac.uk/pdbsum/4j1w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4j1w 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=4j1w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4j1w OCA], [http://pdbe.org/4j1w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4j1w RCSB], [http://www.ebi.ac.uk/pdbsum/4j1w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4j1w ProSAT]</span></td></tr> | |
| </table> | | </table> |
| <div style="background-color:#fffaf0;">
| | == Function == |
| == Publication Abstract from PubMed == | | [https://www.uniprot.org/uniprot/HPPE_STRWE HPPE_STRWE] Non-heme-dependent dioxygenase that catalyzes the oxidative epoxidation of (S)-2-hydroxypropylphosphonate into (1R,2S)-epoxypropylphosphonate, the final step in the biosynthesis of fosfomycin antibiotic.<ref>PMID:16015285</ref> <ref>PMID:16186494</ref> |
| (S)-2-hydroxypropylphosphonate ((S)-2-HPP) epoxidase (HppE) is a mononuclear non-haem-iron-dependent enzyme responsible for the final step in the biosynthesis of the clinically useful antibiotic fosfomycin. Enzymes of this class typically catalyse oxygenation reactions that proceed via the formation of substrate radical intermediates. By contrast, HppE catalyses an unusual dehydrogenation reaction while converting the secondary alcohol of (S)-2-HPP to the epoxide ring of fosfomycin. Here we show that HppE also catalyses a biologically unprecedented 1,2-phosphono migration with the alternative substrate (R)-1-HPP. This transformation probably involves an intermediary carbocation, based on observations with additional substrate analogues, such as (1R)-1-hydroxyl-2-aminopropylphosphonate, and model reactions for both radical- and carbocation-mediated migration. The ability of HppE to catalyse distinct reactions depending on the regio- and stereochemical properties of the substrate is given a structural basis using X-ray crystallography. These results provide compelling evidence for the formation of a substrate-derived cation intermediate in the catalytic cycle of a mononuclear non-haem-iron-dependent enzyme. The underlying chemistry of this unusual phosphono migration may represent a new paradigm for the in vivo construction of phosphonate-containing natural products that can be exploited for the preparation of new phosphonate derivatives.
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| Mechanistic studies of an unprecedented enzyme-catalysed 1,2-phosphono-migration reaction.,Chang WC, Dey M, Liu P, Mansoorabadi SO, Moon SJ, Zhao ZK, Drennan CL, Liu HW Nature. 2013 Apr 4;496(7443):114-8. doi: 10.1038/nature11998. PMID:23552950<ref>PMID:23552950</ref>
| | ==See Also== |
| | | *[[Epoxidase 3D structures|Epoxidase 3D structures]] |
| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| </div>
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| <div class="pdbe-citations 4j1w" style="background-color:#fffaf0;"></div>
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| == References == | | == References == |
| <references/> | | <references/> |
| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
| [[Category: Actinomyces wedmorensis milard and burr 1926]] | | [[Category: Large Structures]] |
| [[Category: Dey, M]] | | [[Category: Streptomyces wedmorensis]] |
| [[Category: Drennan, C L]] | | [[Category: Dey M]] |
| [[Category: 2-phosphono migration]] | | [[Category: Drennan CL]] |
| [[Category: Cupin fold]]
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| [[Category: Hydroxypropylphosphonic acid epoxidase]]
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| [[Category: Metal binding protein]]
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| [[Category: Mononuclear non-heme iron enzyme]]
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| [[Category: Phosphono migration]]
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