2ok4

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{{Seed}}
 
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[[Image:2ok4.png|left|200px]]
 
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==Crystal structure of aromatic amine dehydrogenase TTQ-phenylacetaldehyde adduct oxidized with ferricyanide==
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The line below this paragraph, containing "STRUCTURE_2ok4", creates the "Structure Box" on the page.
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<StructureSection load='2ok4' size='340' side='right'caption='[[2ok4]], [[Resolution|resolution]] 1.45&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[2ok4]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Alcaligenes_faecalis Alcaligenes faecalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OK4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OK4 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.45&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HY1:PHENYLACETALDEHYDE'>HY1</scene>, <scene name='pdbligand=TQQ:(S)-2-AMINO-3-(6,7-DIHYDRO-6-IMINO-7-OXO-1H-INDOL-3-YL)PROPANOIC+ACID'>TQQ</scene></td></tr>
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{{STRUCTURE_2ok4| PDB=2ok4 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ok4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ok4 OCA], [https://pdbe.org/2ok4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ok4 RCSB], [https://www.ebi.ac.uk/pdbsum/2ok4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ok4 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/AAUA_ALCFA AAUA_ALCFA] Oxidizes primary aromatic amines and, more slowly, some long-chain aliphatic amines, but not methylamine or ethylamine. Uses azurin as an electron acceptor to transfer electrons from the reduced tryptophylquinone cofactor.<ref>PMID:11495996</ref> <ref>PMID:16279953</ref> <ref>PMID:8188594</ref> <ref>PMID:7876189</ref> <ref>PMID:17087503</ref> <ref>PMID:17005560</ref> <ref>PMID:16614214</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ok/2ok4_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=2ok4 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Aromatic amine dehydrogenase uses a tryptophan tryptophylquinone (TTQ) cofactor to oxidatively deaminate primary aromatic amines. In the reductive half-reaction, a proton is transferred from the substrate C1 to betaAsp-128 O-2, in a reaction that proceeds by H-tunneling. Using solution studies, kinetic crystallography, and computational simulation we show that the mechanism of oxidation of aromatic carbinolamines is similar to amine oxidation, but that carbinolamine oxidation occurs at a substantially reduced rate. This has enabled us to determine for the first time the structure of the intermediate prior to the H-transfer/reduction step. The proton-betaAsp-128 O-2 distance is approximately 3.7A, in contrast to the distance of approximately 2.7A predicted for the intermediate formed with the corresponding primary amine substrate. This difference of approximately 1.0 A is due to an unexpected conformation of the substrate moiety, which is supported by molecular dynamic simulations and reflected in the approximately 10(7)-fold slower TTQ reduction rate with phenylaminoethanol compared with that with primary amines. A water molecule is observed near TTQ C-6 and is likely derived from the collapse of the preceding carbinolamine TTQ-adduct. We suggest this water molecule is involved in consecutive proton transfers following TTQ reduction, and is ultimately repositioned near the TTQ O-7 concomitant with protein rearrangement. For all carbinolamines tested, highly stable amide-TTQ adducts are formed following proton abstraction and TTQ reduction. Slow hydrolysis of the amide occurs after, rather than prior to, TTQ oxidation and leads ultimately to a carboxylic acid product.
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===Crystal structure of aromatic amine dehydrogenase TTQ-phenylacetaldehyde adduct oxidized with ferricyanide===
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New insights into the reductive half-reaction mechanism of aromatic amine dehydrogenase revealed by reaction with carbinolamine substrates.,Roujeinikova A, Hothi P, Masgrau L, Sutcliffe MJ, Scrutton NS, Leys D J Biol Chem. 2007 Aug 17;282(33):23766-77. Epub 2007 May 1. PMID:17475620<ref>PMID:17475620</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 2ok4" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_17475620}}, adds the Publication Abstract to the page
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*[[Aromatic amine dehydrogenase 3D structures|Aromatic amine dehydrogenase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 17475620 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_17475620}}
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__TOC__
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</StructureSection>
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==About this Structure==
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2OK4 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Alcaligenes_faecalis Alcaligenes faecalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OK4 OCA].
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==Reference==
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New insights into the reductive half-reaction mechanism of aromatic amine dehydrogenase revealed by reaction with carbinolamine substrates., Roujeinikova A, Hothi P, Masgrau L, Sutcliffe MJ, Scrutton NS, Leys D, J Biol Chem. 2007 Aug 17;282(33):23766-77. Epub 2007 May 1. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17475620 17475620]
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[[Category: Alcaligenes faecalis]]
[[Category: Alcaligenes faecalis]]
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[[Category: Aralkylamine dehydrogenase]]
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[[Category: Large Structures]]
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[[Category: Protein complex]]
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[[Category: Leys D]]
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[[Category: Leys, D.]]
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[[Category: Roujeinikova A]]
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[[Category: Roujeinikova, A.]]
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[[Category: Oxidoreductase]]
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[[Category: Ttq]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 11:56:01 2008''
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Current revision

Crystal structure of aromatic amine dehydrogenase TTQ-phenylacetaldehyde adduct oxidized with ferricyanide

PDB ID 2ok4

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