3a28: Difference between revisions
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==Crystal structure of L-2,3-butanediol dehydrogenase== | |||
<StructureSection load='3a28' size='340' side='right' caption='[[3a28]], [[Resolution|resolution]] 2.00Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[3a28]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/"micrococcus_glutamicus"_kinoshita_et_al._1958 "micrococcus glutamicus" kinoshita et al. 1958]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3A28 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3A28 FirstGlance]. <br> | |||
==Function== | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1geg|1geg]]</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=3a28 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3a28 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3a28 RCSB], [http://www.ebi.ac.uk/pdbsum/3a28 PDBsum]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[http://www.uniprot.org/uniprot/BUDC_CORGT BUDC_CORGT]] Catalyzes the reversible reduction of (S)-acetoin to (S,S)-butane-2,3-diol (L-BD) in the presence of NADH. To a lesser extent, can also catalyze the irreversible reduction of diacetyl to (S)-acetoin. Cannot oxidize meso-BD, D-BD, 2-butanol, 1,2-propanediol, ethanol, acetol, 1,2-butanediol, 1,3-butanediol, n-butanol, and n-propanol. Cannot reduce (R)-acetoin, acetol, dihydroxyacetone and 2,4-pentanedione.[REFERENCE:1]<ref>PMID:11577733</ref> | [[http://www.uniprot.org/uniprot/BUDC_CORGT BUDC_CORGT]] Catalyzes the reversible reduction of (S)-acetoin to (S,S)-butane-2,3-diol (L-BD) in the presence of NADH. To a lesser extent, can also catalyze the irreversible reduction of diacetyl to (S)-acetoin. Cannot oxidize meso-BD, D-BD, 2-butanol, 1,2-propanediol, ethanol, acetol, 1,2-butanediol, 1,3-butanediol, n-butanol, and n-propanol. Cannot reduce (R)-acetoin, acetol, dihydroxyacetone and 2,4-pentanedione.[REFERENCE:1]<ref>PMID:11577733</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/a2/3a28_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> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
2,3-butanediol dehydrogenase (BDH) catalyzes the NAD-dependent redox reaction between acetoin and 2,3-butanediol. There are three types of homologous BDH, each stereospecific for both substrate and product. To establish how these homologous enzymes possess differential stereospecificities, we determined the crystal structure of l-BDH with a bound inhibitor at 2.0 A. Comparison with the inhibitor binding mode of meso-BDH highlights the role of a hydrogen-bond from a conserved Trp residue(192). Site-directed mutagenesis of three active site residues of meso-BDH, including Trp(190), which corresponds to Trp(192) of L-BDH, converted its stereospecificity to that of L-BDH. This result confirms the importance of conserved residues in modifying the stereospecificity of homologous enzymes. | |||
Structural basis for chiral substrate recognition by two 2,3-butanediol dehydrogenases.,Otagiri M, Ui S, Takusagawa Y, Ohtsuki T, Kurisu G, Kusunoki M FEBS Lett. 2010 Jan 4;584(1):219-23. Epub . PMID:19941855<ref>PMID:19941855</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Micrococcus glutamicus kinoshita et al. 1958]] | [[Category: Micrococcus glutamicus kinoshita et al. 1958]] | ||
[[Category: Kurisu, G | [[Category: Kurisu, G]] | ||
[[Category: Kusunoki, M | [[Category: Kusunoki, M]] | ||
[[Category: Otagiri, M | [[Category: Otagiri, M]] | ||
[[Category: Ui, S | [[Category: Ui, S]] | ||
[[Category: Chiral substrate recognition]] | [[Category: Chiral substrate recognition]] | ||
[[Category: Oxidoreductase]] | [[Category: Oxidoreductase]] | ||
