2ji7
From Proteopedia
(Difference between revisions)
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<StructureSection load='2ji7' size='340' side='right' caption='[[2ji7]], [[Resolution|resolution]] 1.82Å' scene=''> | <StructureSection load='2ji7' size='340' side='right' caption='[[2ji7]], [[Resolution|resolution]] 1.82Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
| - | [[2ji7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Oxalobacter_formigenes Oxalobacter formigenes]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JI7 OCA]. <br> | + | <table><tr><td colspan='2'>[[2ji7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Oxalobacter_formigenes Oxalobacter formigenes]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JI7 OCA]. <br> |
| - | <b>[[Ligand|Ligands:]]</b> <scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=B3P:2-[3-(2-HYDROXY-1,1-DIHYDROXYMETHYL-ETHYLAMINO)-PROPYLAMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>B3P</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=OXT:3-[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]-2-{(1R,11R,15S,17R)-19-[(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-4-HYDROXY-3-(PHOSPHONOOXY)TETRAHYDROFURAN-2-YL]-1,11,15,17-TETRAHYDROXY-12,12-DIMETHYL-15,17-DIOXIDO-6,10-DIOXO-14,16,18-TRIOXA-2-THIA-5,9-DIAZA-15,17-DIPHOSPHANONADEC-1-YL}-5-(2-{[(R)-HYDROXY(PHOSPHONOOXY)PHOSPHORYL]OXY}ETHYL)-4-METHYL-1,3-THIAZOL-3-IUM'>OXT</scene>, <scene name='pdbligand=PGE:TRIETHYLENE+GLYCOL'>PGE</scene><br> | + | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=B3P:2-[3-(2-HYDROXY-1,1-DIHYDROXYMETHYL-ETHYLAMINO)-PROPYLAMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>B3P</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=OXT:3-[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]-2-{(1R,11R,15S,17R)-19-[(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-4-HYDROXY-3-(PHOSPHONOOXY)TETRAHYDROFURAN-2-YL]-1,11,15,17-TETRAHYDROXY-12,12-DIMETHYL-15,17-DIOXIDO-6,10-DIOXO-14,16,18-TRIOXA-2-THIA-5,9-DIAZA-15,17-DIPHOSPHANONADEC-1-YL}-5-(2-{[(R)-HYDROXY(PHOSPHONOOXY)PHOSPHORYL]OXY}ETHYL)-4-METHYL-1,3-THIAZOL-3-IUM'>OXT</scene>, <scene name='pdbligand=PGE:TRIETHYLENE+GLYCOL'>PGE</scene><br> |
| - | <b>[[Related_structure|Related:]]</b> [[2c31|2c31]], [[2ji6|2ji6]], [[2ji8|2ji8]], [[2ji9|2ji9]], [[2jib|2jib]]< | + | <tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2c31|2c31]], [[2ji6|2ji6]], [[2ji8|2ji8]], [[2ji9|2ji9]], [[2jib|2jib]]</td></tr> |
| - | <b>Activity:</b> <span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucokinase Glucokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.2 2.7.1.2] </span>< | + | <tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glucokinase Glucokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.2 2.7.1.2] </span></td></tr> |
| - | <b>Resources:</b> <span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ji7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ji7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2ji7 RCSB], [http://www.ebi.ac.uk/pdbsum/2ji7 PDBsum]</span>< | + | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ji7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ji7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2ji7 RCSB], [http://www.ebi.ac.uk/pdbsum/2ji7 PDBsum]</span></td></tr> |
| + | <table> | ||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
| - | [[Image:Consurf_key_small.gif|right]] | + | [[Image:Consurf_key_small.gif|200px|right]] |
Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
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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/chain_selection.php?pdb_ID=2ata 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/chain_selection.php?pdb_ID=2ata ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
Despite more than five decades of extensive studies of thiamin diphosphate (ThDP) enzymes, there remain many uncertainties as to how these enzymes achieve their rate enhancements. Here, we present a clear picture of catalysis for the simple nonoxidative decarboxylase, oxalyl-coenzyme A (CoA) decarboxylase, based on crystallographic snapshots along the catalytic cycle and kinetic data on active site mutants. First, we provide crystallographic evidence that, upon binding of oxalyl-CoA, the C-terminal 13 residues fold over the substrate, aligning the substrate alpha-carbon for attack by the ThDP-C2 atom. The second structure presented shows a covalent reaction intermediate after decarboxylation, interpreted as being nonplanar. Finally, the structure of a product complex is presented. In accordance with mutagenesis data, no side chains of the enzyme are implied to directly participate in proton transfer except the glutamic acid (Glu-56), which promotes formation of the 1',4'-iminopyrimidine tautomer of ThDP needed for activation. | Despite more than five decades of extensive studies of thiamin diphosphate (ThDP) enzymes, there remain many uncertainties as to how these enzymes achieve their rate enhancements. Here, we present a clear picture of catalysis for the simple nonoxidative decarboxylase, oxalyl-coenzyme A (CoA) decarboxylase, based on crystallographic snapshots along the catalytic cycle and kinetic data on active site mutants. First, we provide crystallographic evidence that, upon binding of oxalyl-CoA, the C-terminal 13 residues fold over the substrate, aligning the substrate alpha-carbon for attack by the ThDP-C2 atom. The second structure presented shows a covalent reaction intermediate after decarboxylation, interpreted as being nonplanar. Finally, the structure of a product complex is presented. In accordance with mutagenesis data, no side chains of the enzyme are implied to directly participate in proton transfer except the glutamic acid (Glu-56), which promotes formation of the 1',4'-iminopyrimidine tautomer of ThDP needed for activation. | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 09:36, 1 May 2014
X-RAY STRUCTURE OF OXALYL-COA DECARBOXYLASE WITH COVALENT REACTION INTERMEDIATE
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Categories: Oxalobacter formigenes | Oxalyl-CoA decarboxylase | Berthold, C L. | Leeper, F. | Lindqvist, Y. | Moussatche, P. | Richards, N G.J. | Toyota, C G. | Wood, M D. | Decarboxylase | Flavoprotein | Intermediate complex | Lyase | Non- oxidative decarboxylase | Oxalate degradation | Thiamin diphosphate-dependent | Thiamine pyrophosphate
