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[[Image:1kb0.jpg|left|200px]]
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{{STRUCTURE_1kb0|  PDB=1kb0  |  SCENE=  }}
'''Crystal Structure of Quinohemoprotein Alcohol Dehydrogenase from Comamonas testosteroni'''


==Crystal Structure of Quinohemoprotein Alcohol Dehydrogenase from Comamonas testosteroni==
<StructureSection load='1kb0' size='340' side='right'caption='[[1kb0]], [[Resolution|resolution]] 1.44&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1kb0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Comamonas_testosteroni Comamonas testosteroni]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KB0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1KB0 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]] 1.44&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=PQQ:PYRROLOQUINOLINE+QUINONE'>PQQ</scene>, <scene name='pdbligand=TFB:TETRAHYDROFURAN-2-CARBOXYLIC+ACID'>TFB</scene>, <scene name='pdbligand=TRO:2-HYDROXY-TRYPTOPHAN'>TRO</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=1kb0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kb0 OCA], [https://pdbe.org/1kb0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1kb0 RCSB], [https://www.ebi.ac.uk/pdbsum/1kb0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1kb0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/QHED_COMTE QHED_COMTE] Catalyzes the dye-linked oxidation of primary alcohols to the corresponding aldehydes and the (subsequent) oxidation of the aldehydes to carboxylic acids.
== 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/kb/1kb0_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1kb0 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Quinoprotein alcohol dehydrogenases are redox enzymes that participate in distinctive catabolic pathways that enable bacteria to grow on various alcohols as the sole source of carbon and energy. The x-ray structure of the quinohemoprotein alcohol dehydrogenase from Comamonas testosteroni has been determined at 1.44 A resolution. It comprises two domains. The N-terminal domain has a beta-propeller fold and binds one pyrroloquinoline quinone cofactor and one calcium ion in the active site. A tetrahydrofuran-2-carboxylic acid molecule is present in the substrate-binding cleft. The position of this oxidation product provides valuable information on the amino acid residues involved in the reaction mechanism and their function. The C-terminal domain is an alpha-helical type I cytochrome c with His(608) and Met(647) as heme-iron ligands. This is the first reported structure of an electron transfer system between a quinoprotein alcohol dehydrogenase and cytochrome c. The shortest distance between pyrroloquinoline quinone and heme c is 12.9 A, one of the longest physiological edge-to-edge distances yet determined between two redox centers. A highly unusual disulfide bond between two adjacent cysteines bridges the redox centers. It appears essential for electron transfer. A water channel delineates a possible pathway for proton transfer from the active site to the solvent.


==Overview==
Crystal structure of quinohemoprotein alcohol dehydrogenase from Comamonas testosteroni: structural basis for substrate oxidation and electron transfer.,Oubrie A, Rozeboom HJ, Kalk KH, Huizinga EG, Dijkstra BW J Biol Chem. 2002 Feb 1;277(5):3727-32. Epub 2001 Nov 19. PMID:11714714<ref>PMID:11714714</ref>
Quinoprotein alcohol dehydrogenases are redox enzymes that participate in distinctive catabolic pathways that enable bacteria to grow on various alcohols as the sole source of carbon and energy. The x-ray structure of the quinohemoprotein alcohol dehydrogenase from Comamonas testosteroni has been determined at 1.44 A resolution. It comprises two domains. The N-terminal domain has a beta-propeller fold and binds one pyrroloquinoline quinone cofactor and one calcium ion in the active site. A tetrahydrofuran-2-carboxylic acid molecule is present in the substrate-binding cleft. The position of this oxidation product provides valuable information on the amino acid residues involved in the reaction mechanism and their function. The C-terminal domain is an alpha-helical type I cytochrome c with His(608) and Met(647) as heme-iron ligands. This is the first reported structure of an electron transfer system between a quinoprotein alcohol dehydrogenase and cytochrome c. The shortest distance between pyrroloquinoline quinone and heme c is 12.9 A, one of the longest physiological edge-to-edge distances yet determined between two redox centers. A highly unusual disulfide bond between two adjacent cysteines bridges the redox centers. It appears essential for electron transfer. A water channel delineates a possible pathway for proton transfer from the active site to the solvent.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
1KB0 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Comamonas_testosteroni Comamonas testosteroni]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1KB0 OCA].
</div>
<div class="pdbe-citations 1kb0" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
Crystal structure of quinohemoprotein alcohol dehydrogenase from Comamonas testosteroni: structural basis for substrate oxidation and electron transfer., Oubrie A, Rozeboom HJ, Kalk KH, Huizinga EG, Dijkstra BW, J Biol Chem. 2002 Feb 1;277(5):3727-32. Epub 2001 Nov 19. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11714714 11714714]
*[[Alcohol dehydrogenase 3D structures|Alcohol dehydrogenase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Comamonas testosteroni]]
[[Category: Comamonas testosteroni]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Oubrie, A.]]
[[Category: Oubrie A]]
[[Category: Rozeboom, H J.]]
[[Category: Rozeboom HJ]]
[[Category: Beta-propeller fold]]
[[Category: Cytochrome c]]
[[Category: Oxidoreductase]]
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Retrieved from "https://proteopedia.org/1kb0"