1m9h: Difference between revisions

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<StructureSection load='1m9h' size='340' side='right'caption='[[1m9h]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
<StructureSection load='1m9h' size='340' side='right'caption='[[1m9h]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[1m9h]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Corsp Corsp]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M9H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1M9H FirstGlance]. <br>
<table><tr><td colspan='2'>[[1m9h]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Corynebacterium_sp. Corynebacterium sp.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M9H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M9H FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1a80|1a80]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1m9h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m9h OCA], [http://pdbe.org/1m9h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1m9h RCSB], [http://www.ebi.ac.uk/pdbsum/1m9h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1m9h ProSAT]</span></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=1m9h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m9h OCA], [https://pdbe.org/1m9h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m9h RCSB], [https://www.ebi.ac.uk/pdbsum/1m9h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m9h ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/DKGA_CORSC DKGA_CORSC]] Catalyzes the reduction of 2,5-diketo-D-gluconic acid (25DKG) to 2-keto-L-gulonic acid (2KLG). 5-keto-D-fructose and dihydroxyacetone can also serve as substrates. 25DKGR-A exhibits a greater selectivity for the substrate and higher thermal stability than 25DKGR-B.  
[https://www.uniprot.org/uniprot/DKGA_CORSC DKGA_CORSC] Catalyzes the reduction of 2,5-diketo-D-gluconic acid (25DKG) to 2-keto-L-gulonic acid (2KLG). 5-keto-D-fructose and dihydroxyacetone can also serve as substrates. 25DKGR-A exhibits a greater selectivity for the substrate and higher thermal stability than 25DKGR-B.
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
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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=1m9h ConSurf].
</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=1m9h ConSurf].
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<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Corynebacterium 2,5-Diketo-D-gluconic acid reductase (2,5-DKGR) catalyzes the reduction of 2,5-diketo-D-gluconic acid (2,5-DKG) to 2-Keto-L-gulonic acid (2-KLG). 2-KLG is an immediate precursor to L-ascorbic acid (vitamin C), and 2,5-DKGR is, therefore, an important enzyme in a novel industrial method for the production of vitamin C. 2,5-DKGR, as with most other members of the aldo-keto reductase (AKR) superfamily, exhibits a preference for NADPH compared to NADH as a cofactor in the stereo-specific reduction of substrate. The application of 2,5-DKGR in the industrial production of vitamin C would be greatly enhanced if NADH could be efficiently utilized as a cofactor. A mutant form of 2,5-DKGR has previously been identified that exhibits two orders of magnitude higher activity with NADH in comparison to the wild-type enzyme, while retaining a high level of activity with NADPH. We report here an X-ray crystal structure of the holo form of this mutant in complex with NADH cofactor, as well as thermodynamic stability data. By comparing the results to our previously reported X-ray structure of the holo form of wild-type 2,5-DKGR in complex with NADPH, the structural basis of the differential NAD(P)H selectivity of wild-type and mutant 2,5-DKGR enzymes has been identified.
Structural alteration of cofactor specificity in Corynebacterium 2,5-diketo-D-gluconic acid reductase.,Sanli G, Banta S, Anderson S, Blaber M Protein Sci. 2004 Feb;13(2):504-12. Epub 2004 Jan 10. PMID:14718658<ref>PMID:14718658</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1m9h" style="background-color:#fffaf0;"></div>
==See Also==
*[[Group:SMART:2010 Pingry SMART Team Models|SMART:2010 Pingry SMART Team Models]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Corsp]]
[[Category: Corynebacterium sp]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Blaber, M]]
[[Category: Blaber M]]
[[Category: Sanli, G]]
[[Category: Sanli G]]
[[Category: Oxidoreductase]]
[[Category: Tim-barrel]]
Retrieved from "https://proteopedia.org/1m9h"