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| | ==Crystal of PhnZ bound to (R)-2-amino-1-hydroxyethylphosphonic acid== | | ==Crystal of PhnZ bound to (R)-2-amino-1-hydroxyethylphosphonic acid== |
| - | <StructureSection load='4mln' size='340' side='right' caption='[[4mln]], [[Resolution|resolution]] 2.10Å' scene=''> | + | <StructureSection load='4mln' size='340' side='right'caption='[[4mln]], [[Resolution|resolution]] 2.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4mln]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Uncultured_bacterium_hf130_aepn_1 Uncultured bacterium hf130_aepn_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MLN OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4MLN FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4mln]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Uncultured_bacterium_HF130_AEPn_1 Uncultured bacterium HF130_AEPn_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MLN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MLN FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=ODV:[(1R)-2-AMINO-1-HYDROXYETHYL]PHOSPHONIC+ACID'>ODV</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]] 2.1Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4mlm|4mlm]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=ODV:[(1R)-2-AMINO-1-HYDROXYETHYL]PHOSPHONIC+ACID'>ODV</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ALOHA_HF130_AEPn_1_06c ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=663362 uncultured bacterium HF130_AEPn_1])</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=4mln FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mln OCA], [https://pdbe.org/4mln PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mln RCSB], [https://www.ebi.ac.uk/pdbsum/4mln PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mln 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=4mln FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mln OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4mln RCSB], [http://www.ebi.ac.uk/pdbsum/4mln PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/PHNZ_UNCHF PHNZ_UNCHF] Involved in the degradation of the organophosphonate 2-aminoethylphosphonic acid (2-AEP) (Probable). Catalyzes the cleavage of the carbon-phosphorus bond of (2-amino-1-hydroxyethyl)phosphonic acid to yield glycine and phosphate through an oxidative mechanism (PubMed:22564006, PubMed:24198335, PubMed:24706911). It reacts stereospecifically with the R-enantiomer of (2-amino-1-hydroxyethyl)phosphonic acid and is also able to use (R,R)-2-amino-1-hydroxypropylphosphonate as substrate (PubMed:24706911).<ref>PMID:22564006</ref> <ref>PMID:24198335</ref> <ref>PMID:24706911</ref> <ref>PMID:19788654</ref> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 4mln" style="background-color:#fffaf0;"></div> |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Uncultured bacterium hf130_aepn_1]] | + | [[Category: Large Structures]] |
| - | [[Category: Structural genomic]] | + | [[Category: Uncultured bacterium HF130_AEPn_1]] |
| - | [[Category: Jia, Z]] | + | [[Category: Jia Z]] |
| - | [[Category: McSorley, F R]] | + | [[Category: McSorley FR]] |
| - | [[Category: Staalduinen, L M.van]]
| + | [[Category: Zechel DL]] |
| - | [[Category: Zechel, D L]] | + | [[Category: Van Staalduinen LM]] |
| - | [[Category: All alpha]] | + | |
| - | [[Category: Bsgi]]
| + | |
| - | [[Category: Carbon-phosphorus bond cleavage]]
| + | |
| - | [[Category: Hydrolase]]
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| Structural highlights
Function
PHNZ_UNCHF Involved in the degradation of the organophosphonate 2-aminoethylphosphonic acid (2-AEP) (Probable). Catalyzes the cleavage of the carbon-phosphorus bond of (2-amino-1-hydroxyethyl)phosphonic acid to yield glycine and phosphate through an oxidative mechanism (PubMed:22564006, PubMed:24198335, PubMed:24706911). It reacts stereospecifically with the R-enantiomer of (2-amino-1-hydroxyethyl)phosphonic acid and is also able to use (R,R)-2-amino-1-hydroxypropylphosphonate as substrate (PubMed:24706911).[1] [2] [3] [4]
Publication Abstract from PubMed
The enzymes PhnY and PhnZ comprise an oxidative catabolic pathway that enables marine bacteria to use 2-aminoethylphosphonic acid as a source of inorganic phosphate. PhnZ is notable for catalyzing the oxidative cleavage of a carbon-phosphorus bond using Fe(II) and dioxygen, despite belonging to a large family of hydrolytic enzymes, the HD-phosphohydrolase superfamily. We have determined high-resolution structures of PhnZ bound to its substrate, (R)-2-amino-1-hydroxyethylphosphonate (2.1 A), and a buffer additive, l-tartrate (1.7 A). The structures reveal PhnZ to have an active site containing two Fe ions coordinated by four histidines and two aspartates that is strikingly similar to the carbon-carbon bond cleaving enzyme, myo-inositol-oxygenase. The exception is Y24, which forms a transient ligand interaction at the dioxygen binding site of Fe2. Site-directed mutagenesis and kinetic analysis with substrate analogs revealed the roles of key active site residues. A fifth histidine that is conserved in the PhnZ subclade, H62, specifically interacts with the substrate 1-hydroxyl. The structures also revealed that Y24 and E27 mediate a unique induced-fit mechanism whereby E27 specifically recognizes the 2-amino group of the bound substrate and toggles the release of Y24 from the active site, thereby creating space for molecular oxygen to bind to Fe2. Structural comparisons of PhnZ reveal an evolutionary connection between Fe(II)-dependent hydrolysis of phosphate esters and oxidative carbon-phosphorus or carbon-carbon bond cleavage, thus uniting the diverse chemistries that are found in the HD superfamily.
Crystal structure of PhnZ in complex with substrate reveals a di-iron oxygenase mechanism for catabolism of organophosphonates.,van Staalduinen LM, McSorley FR, Schiessl K, Seguin J, Wyatt PB, Hammerschmidt F, Zechel DL, Jia Z Proc Natl Acad Sci U S A. 2014 Apr 8;111(14):5171-6. doi:, 10.1073/pnas.1320039111. Epub 2014 Mar 21. PMID:24706911[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ McSorley FR, Wyatt PB, Martinez A, DeLong EF, Hove-Jensen B, Zechel DL. PhnY and PhnZ comprise a new oxidative pathway for enzymatic cleavage of a carbon-phosphorus bond. J Am Chem Soc. 2012 May 23;134(20):8364-7. doi: 10.1021/ja302072f. Epub 2012 May , 11. PMID:22564006 doi:http://dx.doi.org/10.1021/ja302072f
- ↑ Worsdorfer B, Lingaraju M, Yennawar NH, Boal AK, Krebs C, Bollinger JM Jr, Pandelia ME. Organophosphonate-degrading PhnZ reveals an emerging family of HD domain mixed-valent diiron oxygenases. Proc Natl Acad Sci U S A. 2013 Nov 19;110(47):18874-9. doi:, 10.1073/pnas.1315927110. Epub 2013 Nov 6. PMID:24198335 doi:http://dx.doi.org/10.1073/pnas.1315927110
- ↑ van Staalduinen LM, McSorley FR, Schiessl K, Seguin J, Wyatt PB, Hammerschmidt F, Zechel DL, Jia Z. Crystal structure of PhnZ in complex with substrate reveals a di-iron oxygenase mechanism for catabolism of organophosphonates. Proc Natl Acad Sci U S A. 2014 Apr 8;111(14):5171-6. doi:, 10.1073/pnas.1320039111. Epub 2014 Mar 21. PMID:24706911 doi:http://dx.doi.org/10.1073/pnas.1320039111
- ↑ Martinez A, Tyson GW, Delong EF. Widespread known and novel phosphonate utilization pathways in marine bacteria revealed by functional screening and metagenomic analyses. Environ Microbiol. 2010 Jan;12(1):222-38. doi: 10.1111/j.1462-2920.2009.02062.x. , Epub 2009 Sep 29. PMID:19788654 doi:http://dx.doi.org/10.1111/j.1462-2920.2009.02062.x
- ↑ van Staalduinen LM, McSorley FR, Schiessl K, Seguin J, Wyatt PB, Hammerschmidt F, Zechel DL, Jia Z. Crystal structure of PhnZ in complex with substrate reveals a di-iron oxygenase mechanism for catabolism of organophosphonates. Proc Natl Acad Sci U S A. 2014 Apr 8;111(14):5171-6. doi:, 10.1073/pnas.1320039111. Epub 2014 Mar 21. PMID:24706911 doi:http://dx.doi.org/10.1073/pnas.1320039111
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