View source for 2nvb

==Contribution of Pro275 to the Thermostability of the Alcohol Dehydrogenases (ADHs)==
<StructureSection load='2nvb' size='340' side='right' caption='[[2nvb]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2nvb]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermoanaerobacter_brockii Thermoanaerobacter brockii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2NVB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2NVB FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1ykf|1ykf]]</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">adh ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=29323 Thermoanaerobacter brockii])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Alcohol_dehydrogenase_(NADP(+)) Alcohol dehydrogenase (NADP(+))], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.2 1.1.1.2] </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=2nvb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nvb OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2nvb RCSB], [http://www.ebi.ac.uk/pdbsum/2nvb PDBsum], [http://www.topsan.org/Proteins/ISPC/2nvb TOPSAN]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/ADH_THEBR ADH_THEBR]] Alcohol dehydrogenase with a preference for medium chain secondary alcohols, such as 2-butanol and isopropanol. Has very low activity with primary alcohols, such as ethanol. Under physiological conditions, the enzyme reduces aldehydes and 2-ketones to produce secondary alcohols. Is also active with acetaldehyde and propionaldehyde. 
== 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/nv/2nvb_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/chain_selection.php?pdb_ID=2ata ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Analysis of the three-dimensional structures of two closely related thermophilic and hyperthermophilic alcohol dehydrogenases (ADHs) from the respective microorganisms Entamoeba histolytica (EhADH1) and Thermoanaerobacter brockii (TbADH) suggested that a unique, strategically located proline residue (Pro275) at the center of the dimerization interface might be crucial for maintaining the thermal stability of TbADH. To assess the contribution of Pro275 to the thermal stability of the ADHs, we applied site-directed mutagenesis to replace Asp275 of EhADH1 with Pro (D275P-EhADH1) and conversely Pro275 of TbADH with Asp (P275D-TbADH). The results indicate that replacing Asp275 with Pro significantly enhances the thermal stability of EhADH1 (DeltaT(1/2) &lt;/= +10 degrees C), whereas the reverse mutation in the thermophilic TbADH (P275D-TbADH) reduces the thermostability of the enzyme (DeltaT(1/2) &lt;/= -18.8 degrees C). Analysis of the crystal structures of the thermostabilized mutant D275P-EhADH1 and the thermocompromised mutant P275D-TbADH suggest that a proline residue at position 275 thermostabilized the enzymes by reducing flexibility and by reinforcing hydrophobic interactions at the dimer-dimer interface of the tetrameric ADHs. Proteins 2008. (c) 2008 Wiley-Liss, Inc.

Thermal stabilization of the protozoan Entamoeba histolytica alcohol dehydrogenase by a single proline substitution.,Goihberg E, Dym O, Tel-Or S, Shimon L, Frolow F, Peretz M, Burstein Y Proteins. 2008 Feb 7;. PMID:18260103<ref>PMID:18260103</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Alcohol dehydrogenase|Alcohol dehydrogenase]]
*[[Alcohol dehydrogenase from Entamoeba histolytica|Alcohol dehydrogenase from Entamoeba histolytica]]
*[[Contribution of Pro275 to the Thermostability of the Alcohol Dehydrogenases|Contribution of Pro275 to the Thermostability of the Alcohol Dehydrogenases]]
*[[D275P mutant of alcohol dehydrogenase from protozoa Entamoeba histolytica|D275P mutant of alcohol dehydrogenase from protozoa Entamoeba histolytica]]
*[[Tetrameric alcohol dehydrogenases|Tetrameric alcohol dehydrogenases]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Thermoanaerobacter brockii]]
[[Category: Burstein, Y]]
[[Category: Dym, O]]
[[Category: Frolow, F]]
[[Category: Goihberg, E]]
[[Category: ISPC, Israel Structural Proteomics Center]]
[[Category: Peretz, M]]
[[Category: Tel-Or, S]]
[[Category: Oxidoreductase]]
[[Category: Rossmann fold]]
[[Category: Structural genomic]]