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| | <StructureSection load='4u5r' size='340' side='right'caption='[[4u5r]], [[Resolution|resolution]] 1.55Å' scene=''> | | <StructureSection load='4u5r' size='340' side='right'caption='[[4u5r]], [[Resolution|resolution]] 1.55Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4u5r]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhojr Rhojr]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U5R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4U5R FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4u5r]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Rhodococcus_jostii_RHA1 Rhodococcus jostii RHA1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4U5R OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4U5R FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">RHA1_ro02670 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=101510 RHOJR])</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=4u5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u5r OCA], [https://pdbe.org/4u5r PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4u5r RCSB], [https://www.ebi.ac.uk/pdbsum/4u5r PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4u5r 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=4u5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4u5r OCA], [http://pdbe.org/4u5r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4u5r RCSB], [http://www.ebi.ac.uk/pdbsum/4u5r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4u5r ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/Q0SDB1_RHOJR Q0SDB1_RHOJR] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Rhojr]] | + | [[Category: Rhodococcus jostii RHA1]] |
| - | [[Category: Poddar, H]] | + | [[Category: Poddar H]] |
| - | [[Category: Rozeboom, H J]] | + | [[Category: Rozeboom HJ]] |
| - | [[Category: Thunnissen, A M.W H]] | + | [[Category: Thunnissen AMWH]] |
| - | [[Category: Beta-alpha-beta structural motif]]
| + | |
| - | [[Category: Isomerase]]
| + | |
| - | [[Category: Magnesium binding enzyme]]
| + | |
| - | [[Category: Tautomerase superfamily]]
| + | |
| Structural highlights
Function
Q0SDB1_RHOJR
Publication Abstract from PubMed
The vast majority of characterized oxygenases use bound cofactors to activate molecular oxygen to carry out oxidation chemistry. Here, we show that an enzyme of unknown activity, RhCC from Rhodococcus jostii RHA1, functions as an oxygenase, using 4-hydroxyphenylenolpyruvate as a substrate. This unique and complex reaction yields 3-hydroxy-3-(4-hydroxyphenyl)-pyruvate, 4-hydroxybenzaldehyde, and oxalic acid as major products. Incubations with H2(18)O, (18)O2, and a substrate analogue suggest that this enzymatic oxygenation reaction likely involves a peroxide anion intermediate. Analysis of sequence similarity and the crystal structure of RhCC (solved at 1.78 A resolution) reveal that this enzyme belongs to the tautomerase superfamily. Members of this superfamily typically catalyze tautomerization, dehalogenation, or decarboxylation reactions rather than oxygenation reactions. The structure shows the absence of cofactors, establishing RhCC as a rare example of a redox-metal- and coenzyme-free oxygenase. This sets the stage to study the mechanistic details of cofactor-independent oxygen activation in the unusual context of the tautomerase superfamily.
Functional and structural characterization of an unusual cofactor-independent oxygenase.,Baas BJ, Poddar H, Geertsema EM, Rozeboom HJ, de Vries MP, Permentier HP, Thunnissen AM, Poelarends GJ Biochemistry. 2015 Feb 10;54(5):1219-32. doi: 10.1021/bi501200j. Epub 2015 Jan, 22. PMID:25565350[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Baas BJ, Poddar H, Geertsema EM, Rozeboom HJ, de Vries MP, Permentier HP, Thunnissen AM, Poelarends GJ. Functional and structural characterization of an unusual cofactor-independent oxygenase. Biochemistry. 2015 Feb 10;54(5):1219-32. doi: 10.1021/bi501200j. Epub 2015 Jan, 22. PMID:25565350 doi:http://dx.doi.org/10.1021/bi501200j
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