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| | ==Toluene 4-monooxygenase HD T201A diferric, resting state complex== | | ==Toluene 4-monooxygenase HD T201A diferric, resting state complex== |
| - | <StructureSection load='3ge8' size='340' side='right' caption='[[3ge8]], [[Resolution|resolution]] 2.19Å' scene=''> | + | <StructureSection load='3ge8' size='340' side='right'caption='[[3ge8]], [[Resolution|resolution]] 2.19Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3ge8]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_25411 Atcc 25411]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GE8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3GE8 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3ge8]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_mendocina Pseudomonas mendocina]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3GE8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3GE8 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</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]] 2.19Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ge3|3ge3]], [[3dhh|3dhh]], [[3dhi|3dhi]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=FE:FE+(III)+ION'>FE</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">tmoA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300 ATCC 25411]), tmoE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300 ATCC 25411]), tmoB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300 ATCC 25411]), tmoD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=300 ATCC 25411])</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=3ge8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ge8 OCA], [https://pdbe.org/3ge8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3ge8 RCSB], [https://www.ebi.ac.uk/pdbsum/3ge8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3ge8 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=3ge8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ge8 OCA], [http://pdbe.org/3ge8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3ge8 RCSB], [http://www.ebi.ac.uk/pdbsum/3ge8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3ge8 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/TMOD_PSEME TMOD_PSEME]] Effector protein subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol. Required for optimal efficiency and specificity of the holoenzyme.<ref>PMID:11297417</ref> <ref>PMID:15882052</ref> <ref>PMID:19033467</ref> [[http://www.uniprot.org/uniprot/TMOB_PSEME TMOB_PSEME]] Subunit T4moB of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol.<ref>PMID:19290655</ref> <ref>PMID:19705873</ref> [[http://www.uniprot.org/uniprot/TMOE_PSEME TMOE_PSEME]] Subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol. | + | [https://www.uniprot.org/uniprot/TMOE_PSEME TMOE_PSEME] Subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol. |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[Monooxygenase|Monooxygenase]] | + | *[[Monooxygenase 3D structures|Monooxygenase 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 25411]] | + | [[Category: Large Structures]] |
| - | [[Category: Bailey, L J]] | + | [[Category: Pseudomonas mendocina]] |
| - | [[Category: Elsen, N L]] | + | [[Category: Bailey LJ]] |
| - | [[Category: Fox, B G]] | + | [[Category: Elsen NL]] |
| - | [[Category: Hauser, A D]] | + | [[Category: Fox BG]] |
| - | [[Category: Aromatic hydrocarbons catabolism]] | + | [[Category: Hauser AD]] |
| - | [[Category: Diiron hydroxylase]]
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| - | [[Category: Effector protein]]
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| - | [[Category: Fad]]
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| - | [[Category: Flavoprotein]]
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| - | [[Category: Iron]]
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| - | [[Category: Monooxygenase]]
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| - | [[Category: Oxidoreductase]]
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| - | [[Category: T201a]]
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| - | [[Category: T4moh]]
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| Structural highlights
Function
TMOE_PSEME Subunit of the multicomponent enzyme toluene-4-monooxygenase that hydroxylates toluene to form p-cresol.
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
The active site residue Thr-201 in toluene 4-monooxygenase hydroxylase (T4moH) has a structural counterpart in the active sites of all diiron monooxygenases. Thus, our previous finding that mutation of this residue to Ala, Gly, or Ser had no impact on steady-state catalysis or coupling was surprising. In this work, we provide kinetic, biochemical, and structural evidence that one role of Thr-201 may be to stabilize a peroxo-level intermediate during enzyme catalysis. During reactions in the absence of substrate, T201 T4moH slowly consumed O(2) but only a negligible amount of H(2)O(2) was released. In contrast, T201A T4moH gave stoichometric release of H(2)O(2) during reaction in the absence of substrate. Both enzyme isoforms were tightly coupled during steady-state catalysis with saturating toluene and other optimal substrates and exhibited near-identical kinetic parameters. However, rapid mix single-turnover studies showed that T201A T4moH had a faster first-order rate constant for product formation than T201 T4moH did. Comparison of X-ray crystal structures of resting and reduced T201A T4moH in complex with T4moD with comparable structures of T201 T4moHD revealed changes in the positions of several key active site residues relative to the comparable structures of T201 T4moH with T4moD. This combination of catalytic and structural studies offers important new insight into the role of the role of conserved Thr-201, and its contributions to the catalytic reaction cycle.
Role for threonine 201 in the catalytic cycle of the soluble diiron hydroxylase toluene 4-monooxygenase.,Elsen NL, Bailey LJ, Hauser AD, Fox BG Biochemistry. 2009 May 12;48(18):3838-46. PMID:19290655[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Elsen NL, Bailey LJ, Hauser AD, Fox BG. Role for threonine 201 in the catalytic cycle of the soluble diiron hydroxylase toluene 4-monooxygenase. Biochemistry. 2009 May 12;48(18):3838-46. PMID:19290655 doi:10.1021/bi900144a
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