5ej8
From Proteopedia
(Difference between revisions)
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| - | ''' | + | {{Large structure}} |
| + | ==EcMenD-ThDP-Mn2+ complex structure soaked with 2-ketoglutarate for 2 min== | ||
| + | <StructureSection load='5ej8' size='340' side='right' caption='[[5ej8]], [[Resolution|resolution]] 1.34Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5ej8]] is a 8 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5EJ8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5EJ8 FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=TD6:(4S)-4-{3-[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]-5-(2-{[(S)-HYDROXY(PHOSPHONOOXY)PHOSPHORYL]OXY}ETHYL)-4-METHYL-1,3LAMBDA~5~-THIAZOL-2-YL}-4-HYDROXYBUTANOIC+ACID'>TD6</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5ej4|5ej4]], [[5ej5|5ej5]], [[5ej6|5ej6]], [[5ej7|5ej7]], [[5ej9|5ej9]], [[5eja|5eja]], [[5ejm|5ejm]]</td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid_synthase 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.2.1.9 2.2.1.9] </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=5ej8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ej8 OCA], [http://pdbe.org/5ej8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ej8 RCSB], [http://www.ebi.ac.uk/pdbsum/5ej8 PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | {{Large structure}} | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/MEND_ECOLI MEND_ECOLI]] Catalyzes the thiamine diphosphate-dependent decarboxylation of 2-oxoglutarate and the subsequent addition of the resulting succinic semialdehyde-thiamine pyrophosphate anion to isochorismate to yield 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylate (SEPHCHC).<ref>PMID:1459959</ref> <ref>PMID:17760421</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Enamine is a well-known reactive intermediate mediating essential thiamine-dependent catalysis in central metabolic pathways. How-ever, this intermediate is not found in the thiamine-dependent catal-ysis of the vitamin K biosynthetic enzyme MenD. Instead, an active tetrahedral post-decarboxylation intermediate is stably formed in the enzyme and structurally determined at 1.34 A resolution in crystal. This intermediate takes a unique conformation that allows only one proton between its tetrahedral reaction center and the exo-ring ni-trogen atom of the aminopyrimidine moiety in the cofactor with a short distance of 3.0 A. It is readily convertible to the final product of the enzymic reaction with a solvent-exchangeable proton at its reaction center. These results show that the thiamine-dependent enzyme utilizes a tetrahedral intermediate in a mechanism distinct from the enamine catalytic chemistry. | ||
| - | + | A thiamine-dependent enzyme utilizes an active tetrahedral intermediate in vitamin K biosynthesis.,Song H, Dong C, Qin M, Chen Y, Sun Y, Liu J, Chan W, Guo Z J Am Chem Soc. 2016 May 23. PMID:27213829<ref>PMID:27213829</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 5ej8" style="background-color:#fffaf0;"></div> | |
| - | [[Category: | + | == References == |
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase]] | ||
| + | [[Category: Chen, Y Z]] | ||
| + | [[Category: Dong, C]] | ||
| + | [[Category: Guo, Z H]] | ||
| + | [[Category: Song, H G]] | ||
| + | [[Category: Sun, Y R]] | ||
| + | [[Category: Post-decarboxylation intermediate]] | ||
| + | [[Category: Transferase]] | ||
Revision as of 15:35, 1 June 2016
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EcMenD-ThDP-Mn2+ complex structure soaked with 2-ketoglutarate for 2 min
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