2ezt

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[[Image:2ezt.gif|left|200px]]<br /><applet load="2ezt" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:2ezt.gif|left|200px]]
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caption="2ezt, resolution 2.29&Aring;" />
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'''Pyruvate oxidase variant F479W in complex with reaction intermediate 2-hydroxyethyl-thiamin diphosphate'''<br />
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{{Structure
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|PDB= 2ezt |SIZE=350|CAPTION= <scene name='initialview01'>2ezt</scene>, resolution 2.29&Aring;
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|SITE=
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|LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=TDM:2-[(2E)-3-[(4-AMINO-2-METHYLPYRIMIDIN-5-YL)METHYL]-2-(1-HYDROXYETHYLIDENE)-4-METHYL-2,3-DIHYDRO-1,3-THIAZOL-5-YL]ETHYL+TRIHYDROGEN+DIPHOSPHATE'>TDM</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene> and <scene name='pdbligand=PYR:PYRUVIC ACID'>PYR</scene>
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|ACTIVITY= [http://en.wikipedia.org/wiki/Pyruvate_oxidase Pyruvate oxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.2.3.3 1.2.3.3]
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|GENE= pox5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1590 Lactobacillus plantarum])
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}}
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'''Pyruvate oxidase variant F479W in complex with reaction intermediate 2-hydroxyethyl-thiamin diphosphate'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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2EZT is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Lactobacillus_plantarum Lactobacillus plantarum] with <scene name='pdbligand=MG:'>MG</scene>, <scene name='pdbligand=NA:'>NA</scene>, <scene name='pdbligand=PO4:'>PO4</scene>, <scene name='pdbligand=TDM:'>TDM</scene>, <scene name='pdbligand=FAD:'>FAD</scene> and <scene name='pdbligand=PYR:'>PYR</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Pyruvate_oxidase Pyruvate oxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.2.3.3 1.2.3.3] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2EZT OCA].
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2EZT is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Lactobacillus_plantarum Lactobacillus plantarum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2EZT OCA].
==Reference==
==Reference==
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The catalytic cycle of a thiamin diphosphate enzyme examined by cryocrystallography., Wille G, Meyer D, Steinmetz A, Hinze E, Golbik R, Tittmann K, Nat Chem Biol. 2006 Jun;2(6):324-8. Epub 2006 May 7. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=16680160 16680160]
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The catalytic cycle of a thiamin diphosphate enzyme examined by cryocrystallography., Wille G, Meyer D, Steinmetz A, Hinze E, Golbik R, Tittmann K, Nat Chem Biol. 2006 Jun;2(6):324-8. Epub 2006 May 7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16680160 16680160]
[[Category: Lactobacillus plantarum]]
[[Category: Lactobacillus plantarum]]
[[Category: Pyruvate oxidase]]
[[Category: Pyruvate oxidase]]
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[[Category: tpp enzyme]]
[[Category: tpp enzyme]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:16:14 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:46:20 2008''

Revision as of 14:46, 20 March 2008

Image:2ezt.gif


PDB ID 2ezt

Drag the structure with the mouse to rotate
, resolution 2.29Å
Ligands: , , , , and
Gene: pox5 (Lactobacillus plantarum)
Activity: Pyruvate oxidase, with EC number 1.2.3.3
Coordinates: save as pdb, mmCIF, xml



Pyruvate oxidase variant F479W in complex with reaction intermediate 2-hydroxyethyl-thiamin diphosphate


Overview

Enzymes that use the cofactor thiamin diphosphate (ThDP, 1), the biologically active form of vitamin B(1), are involved in numerous metabolic pathways in all organisms. Although a theory of the cofactor's underlying reaction mechanism has been established over the last five decades, the three-dimensional structures of most major reaction intermediates of ThDP enzymes have remained elusive. Here, we report the X-ray structures of key intermediates in the oxidative decarboxylation of pyruvate, a central reaction in carbon metabolism catalyzed by the ThDP- and flavin-dependent enzyme pyruvate oxidase (POX)3 from Lactobacillus plantarum. The structures of 2-lactyl-ThDP (LThDP, 2) and its stable phosphonate analog, of 2-hydroxyethyl-ThDP (HEThDP, 3) enamine and of 2-acetyl-ThDP (AcThDP, 4; all shown bound to the enzyme's active site) provide profound insights into the chemical mechanisms and the stereochemical course of thiamin catalysis. These snapshots also suggest a mechanism for a phosphate-linked acyl transfer coupled to electron transfer in a radical reaction of pyruvate oxidase.

About this Structure

2EZT is a Single protein structure of sequence from Lactobacillus plantarum. Full crystallographic information is available from OCA.

Reference

The catalytic cycle of a thiamin diphosphate enzyme examined by cryocrystallography., Wille G, Meyer D, Steinmetz A, Hinze E, Golbik R, Tittmann K, Nat Chem Biol. 2006 Jun;2(6):324-8. Epub 2006 May 7. PMID:16680160

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