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New page: left|200px<br /><applet load="2yyj" size="350" color="white" frame="true" align="right" spinBox="true" caption="2yyj, resolution 1.66Å" /> '''Crystal structure of... |
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== | ==Crystal structure of the oxygenase component (HpaB) of 4-hydroxyphenylacetate 3-monooxygenase complexed with FAD and 4-hydroxyphenylacetate== | ||
The 4-hydroxyphenylacetate (4HPA) 3-monooxygenase is involved in the | <StructureSection load='2yyj' size='340' side='right'caption='[[2yyj]], [[Resolution|resolution]] 1.66Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2yyj]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YYJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2YYJ FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.66Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4HP:4-HYDROXYPHENYLACETATE'>4HP</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=2yyj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yyj OCA], [https://pdbe.org/2yyj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2yyj RCSB], [https://www.ebi.ac.uk/pdbsum/2yyj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2yyj ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/HPAB_THET8 HPAB_THET8] Utilizes FADH(2) supplied by HpaC, to catalyze the hydroxylation of 4-hydroxyphenylacetic acid, leading to the production of 3,4-dihydroxyphenylacetic acid (DHPA).<ref>PMID:17804419</ref> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/yy/2yyj_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2yyj ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The 4-hydroxyphenylacetate (4HPA) 3-monooxygenase is involved in the initial step of the 4HPA degradation pathway and catalyzes 4HPA hydroxylation to 3,4-dihydroxyphenylacetate. This enzyme consists of two components, an oxygenase (HpaB) and a reductase (HpaC). To understand the structural basis of the catalytic mechanism of HpaB, crystal structures of HpaB from Thermus thermophilus HB8 were determined in three states: a ligand-free form, a binary complex with FAD, and a ternary complex with FAD and 4HPA. Structural analysis revealed that the binding and dissociation of flavin are accompanied by conformational changes of the loop between beta5 and beta6 and of the loop between beta8 and beta9, leading to preformation of part of the substrate-binding site (Ser-197 and Thr-198). The latter loop further changes its conformation upon binding of 4HPA and obstructs the active site from the bulk solvent. Arg-100 is located adjacent to the putative oxygen-binding site and may be involved in the formation and stabilization of the C4a-hydroperoxyflavin intermediate. | |||
Crystal structure of the oxygenase component (HpaB) of the 4-hydroxyphenylacetate 3-monooxygenase from Thermus thermophilus HB8.,Kim SH, Hisano T, Takeda K, Iwasaki W, Ebihara A, Miki K J Biol Chem. 2007 Nov 9;282(45):33107-17. Epub 2007 Sep 5. PMID:17804419<ref>PMID:17804419</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2yyj" style="background-color:#fffaf0;"></div> | |||
[[Category: | == References == | ||
[[Category: Thermus thermophilus]] | <references/> | ||
[[Category: Ebihara | __TOC__ | ||
[[Category: Hisano | </StructureSection> | ||
[[Category: Iwasaki | [[Category: Large Structures]] | ||
[[Category: Kim | [[Category: Thermus thermophilus HB8]] | ||
[[Category: Miki | [[Category: Ebihara A]] | ||
[[Category: Takeda | [[Category: Hisano T]] | ||
[[Category: Iwasaki W]] | |||
[[Category: Kim S-H]] | |||
[[Category: Miki K]] | |||
[[Category: Takeda K]] | |||
Latest revision as of 12:12, 25 October 2023
Crystal structure of the oxygenase component (HpaB) of 4-hydroxyphenylacetate 3-monooxygenase complexed with FAD and 4-hydroxyphenylacetateCrystal structure of the oxygenase component (HpaB) of 4-hydroxyphenylacetate 3-monooxygenase complexed with FAD and 4-hydroxyphenylacetate
Structural highlights
FunctionHPAB_THET8 Utilizes FADH(2) supplied by HpaC, to catalyze the hydroxylation of 4-hydroxyphenylacetic acid, leading to the production of 3,4-dihydroxyphenylacetic acid (DHPA).[1] 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 PubMedThe 4-hydroxyphenylacetate (4HPA) 3-monooxygenase is involved in the initial step of the 4HPA degradation pathway and catalyzes 4HPA hydroxylation to 3,4-dihydroxyphenylacetate. This enzyme consists of two components, an oxygenase (HpaB) and a reductase (HpaC). To understand the structural basis of the catalytic mechanism of HpaB, crystal structures of HpaB from Thermus thermophilus HB8 were determined in three states: a ligand-free form, a binary complex with FAD, and a ternary complex with FAD and 4HPA. Structural analysis revealed that the binding and dissociation of flavin are accompanied by conformational changes of the loop between beta5 and beta6 and of the loop between beta8 and beta9, leading to preformation of part of the substrate-binding site (Ser-197 and Thr-198). The latter loop further changes its conformation upon binding of 4HPA and obstructs the active site from the bulk solvent. Arg-100 is located adjacent to the putative oxygen-binding site and may be involved in the formation and stabilization of the C4a-hydroperoxyflavin intermediate. Crystal structure of the oxygenase component (HpaB) of the 4-hydroxyphenylacetate 3-monooxygenase from Thermus thermophilus HB8.,Kim SH, Hisano T, Takeda K, Iwasaki W, Ebihara A, Miki K J Biol Chem. 2007 Nov 9;282(45):33107-17. Epub 2007 Sep 5. PMID:17804419[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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