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| | <StructureSection load='6xje' size='340' side='right'caption='[[6xje]], [[Resolution|resolution]] 1.45Å' scene=''> | | <StructureSection load='6xje' size='340' side='right'caption='[[6xje]], [[Resolution|resolution]] 1.45Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[6xje]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Herbaspirillum_sp._bh-1 Herbaspirillum sp. bh-1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6XJE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6XJE FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[6xje]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Herbaspirillum_sp._BH-1 Herbaspirillum sp. BH-1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6XJE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6XJE FirstGlance]. <br> |
| - | </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=TIU:tricarbonodiimidic+diamide'>TIU</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]] 1.45Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[6xix|6xix]], [[6xj4|6xj4]]</div></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=TIU:tricarbonodiimidic+diamide'>TIU</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">HBH1_00246 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2058884 Herbaspirillum sp. BH-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=6xje FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6xje OCA], [https://pdbe.org/6xje PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6xje RCSB], [https://www.ebi.ac.uk/pdbsum/6xje PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6xje 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=6xje FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6xje OCA], [https://pdbe.org/6xje PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6xje RCSB], [https://www.ebi.ac.uk/pdbsum/6xje PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6xje ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/A0A2N6JFX7_9BURK A0A2N6JFX7_9BURK] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Herbaspirillum sp. bh-1]] | + | [[Category: Herbaspirillum sp. BH-1]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Elias, M H]] | + | [[Category: Elias MH]] |
| - | [[Category: Tassoulas, L T]] | + | [[Category: Tassoulas LT]] |
| - | [[Category: Wackett, L P]] | + | [[Category: Wackett LP]] |
| - | [[Category: Biuret]]
| + | |
| - | [[Category: Cysteine hydrolase]]
| + | |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: Nitrogen]]
| + | |
| - | [[Category: Triuret]]
| + | |
| - | [[Category: Trta]]
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| Structural highlights
Function
A0A2N6JFX7_9BURK
Publication Abstract from PubMed
Triuret (carbonyldiurea) is an impurity found in industrial urea fertilizer (<0.1% w/w) that is applied, worldwide, around 300 million pounds each year on agricultural lands. In addition to anthropogenic sources, endogenous triuret has been identified in amoeba and human urine, the latter being diagnostic for hypokalemia. The present study is the first to describe the metabolic breakdown of triuret, which funnels into biuret metabolism. We identified the gene responsible for triuret decomposition (trtA) in bacterial genomes, clustered with biuH, that encodes biuret hydrolase and has close protein sequence homology. TrtA is a member of the isochorismatase-like hydrolase protein family (IHL), similarly to BiuH, and has a catalytic efficiency (kcat/KM) of 6 x 10(5) (M(-1)s(-1)), a KM for triuret of 20 muM, and exquisite substrate specificity. Indeed, TrtA has four orders of magnitude less activity with biuret. Crystal structures of TrtA in apo and holo form were solved and compared to the BiuH structure. The high substrate selectivity was found to be conveyed by second shell residues around each active site. Mutagenesis of residues conserved in TrtA to the alternate consensus found in BiuHs revealed residues critical to triuret hydrolase activity but no single mutant evolved more biuret activity and likely a combination of mutations is required to interconvert between TrtA, BiuH functions. TrtA-mediated triuret metabolism is relatively rare in recorded genomes (1-2%), but is largely found in plant-associated, nodulating and endophytic bacteria. This study suggests functions for triuret hydrolase in certain eukaryotic intermediary processes and prokaryotic intermediary or biodegradative metabolism.
Discovery of an ultra-specific triuret hydrolase (TrtA) establishes the triuret biodegradation pathway.,Tassoulas LJ, Elias MH, Wackett LP J Biol Chem. 2020 Nov 10. pii: RA120.015631. doi: 10.1074/jbc.RA120.015631. PMID:33172891[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Tassoulas LJ, Elias MH, Wackett LP. Discovery of an ultra-specific triuret hydrolase (TrtA) establishes the triuret biodegradation pathway. J Biol Chem. 2020 Nov 10. pii: RA120.015631. doi: 10.1074/jbc.RA120.015631. PMID:33172891 doi:http://dx.doi.org/10.1074/jbc.RA120.015631
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