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[[Image:2ime.jpg|left|200px]]


{{Structure
==2-Hydroxychromene-2-carboxylate Isomerase: a Kappa Class Glutathione-S-Transferase from Pseudomonas putida==
|PDB= 2ime |SIZE=350|CAPTION= <scene name='initialview01'>2ime</scene>, resolution 1.70&Aring;
<StructureSection load='2ime' size='340' side='right'caption='[[2ime]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND= <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=GSH:GLUTATHIONE'>GSH</scene>, <scene name='pdbligand=TOH:(3E)-4-(2-HYDROXYPHENYL)-2-OXOBUT-3-ENOIC+ACID'>TOH</scene>, <scene name='pdbligand=2C2:(2S)-2-HYDROXY-2H-CHROMENE-2-CARBOXYLIC+ACID'>2C2</scene> and <scene name='pdbligand=CXS:3-CYCLOHEXYL-1-PROPYLSULFONIC ACID'>CXS</scene>
<table><tr><td colspan='2'>[[2ime]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_putida Pseudomonas putida]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IME OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2IME FirstGlance]. <br>
|ACTIVITY= [http://en.wikipedia.org/wiki/Glutathione_transferase Glutathione transferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.18 2.5.1.18]  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.7&#8491;</td></tr>
|GENE= nahD ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=303 Pseudomonas putida])
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=2C2:(2S)-2-HYDROXY-2H-CHROMENE-2-CARBOXYLIC+ACID'>2C2</scene>, <scene name='pdbligand=CXS:3-CYCLOHEXYL-1-PROPYLSULFONIC+ACID'>CXS</scene>, <scene name='pdbligand=GSH:GLUTATHIONE'>GSH</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=TOH:(3E)-4-(2-HYDROXYPHENYL)-2-OXOBUT-3-ENOIC+ACID'>TOH</scene></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=2ime FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ime OCA], [https://pdbe.org/2ime PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ime RCSB], [https://www.ebi.ac.uk/pdbsum/2ime PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ime ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NAHD_PSEPU NAHD_PSEPU] Involved in the naphthalene catabolic pathway. Catalyzes the reversible glutathione-dependent isomerization of 2-hydroxychromene-2-carboxylate (HCCA) to trans-O-hydroxybenzylidenepyruvate (THBPA).<ref>PMID:8002605</ref> <ref>PMID:1447127</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/im/2ime_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/main_output.php?pdb_ID=2ime ConSurf].
<div style="clear:both"></div>


'''2-Hydroxychromene-2-carboxylate Isomerase: a Kappa Class Glutathione-S-Transferase from Pseudomonas putida'''
==See Also==
 
*[[Glutathione S-transferase 3D structures|Glutathione S-transferase 3D structures]]
 
== References ==
==Overview==
<references/>
The enzyme 2-hydroxychromene-2-carboxylic acid (HCCA) isomerase catalyzes the glutathione (GSH)-dependent interconversion (Keq = 1.5) of HCCA and trans-o-hydroxybenzylidene pyruvic acid (tHBPA) in the naphthalene catabolic pathway of Pseudomonas putida. The dimeric protein binds one molecule of GSH very tightly (Kd approximately 5 nM) and a second molecule of GSH with much lower affinity (Kd approximately 2 to 11 microM). The enzyme is unstable in the absence of GSH. The turnover number in the forward direction (47 s(-1) at 25 degrees C) greatly exceeds off rates for GSH (koff approximately 10(-3) to 10(-2) s(-1) at 10 degrees C), suggesting that GSH acts as a tightly bound cofactor in the reaction. The crystal structure of the enzyme at 1.7 A resolution reveals that the isomerase is closely related to class kappa GSH transferases. Diffraction quality crystals could only be obtained in the presence of GSH and HCCA/tHBPA. Clear electron density is seen for GSH. Electron density for the organic substrates is located near the GSH and is best modeled to include both HCCA and tHBPA at occupancies of 0.5 for each. Although there is no electron density connecting the sulfur of GSH to the organic substrates, the sulfur is located very close (2.78 A) to C7 of HCCA. Taken together, the results suggest that the isomerization reaction involves a short-lived covalent adduct between the sulfur of GSH and C7 of the substrate.
__TOC__
 
</StructureSection>
==About this Structure==
[[Category: Large Structures]]
2IME is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Pseudomonas_putida Pseudomonas putida]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IME OCA].
 
==Reference==
2-Hydroxychromene-2-carboxylic acid isomerase: a kappa class glutathione transferase from Pseudomonas putida., Thompson LC, Ladner JE, Codreanu SG, Harp J, Gilliland GL, Armstrong RN, Biochemistry. 2007 Jun 12;46(23):6710-22. Epub 2007 May 18. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17508726 17508726]
[[Category: Glutathione transferase]]
[[Category: Pseudomonas putida]]
[[Category: Pseudomonas putida]]
[[Category: Single protein]]
[[Category: Armstrong RN]]
[[Category: Armstrong, R N.]]
[[Category: Codreanu SG]]
[[Category: Codreanu, S G.]]
[[Category: Gilliland GL]]
[[Category: Gilliland, G L.]]
[[Category: Harp J]]
[[Category: Harp, J.]]
[[Category: Ladner JE]]
[[Category: Ladner, J E.]]
[[Category: Thompson LC]]
[[Category: Thompson, L C.]]
[[Category: 2C2]]
[[Category: CXS]]
[[Category: GSH]]
[[Category: PO4]]
[[Category: TOH]]
[[Category: glutathione]]
[[Category: isomerase]]
[[Category: kappa gst]]
[[Category: kgst]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 17:31:07 2008''

Latest revision as of 12:03, 21 February 2024

2-Hydroxychromene-2-carboxylate Isomerase: a Kappa Class Glutathione-S-Transferase from Pseudomonas putida2-Hydroxychromene-2-carboxylate Isomerase: a Kappa Class Glutathione-S-Transferase from Pseudomonas putida

Structural highlights

2ime is a 1 chain structure with sequence from Pseudomonas putida. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.7Å
Ligands:, , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

NAHD_PSEPU Involved in the naphthalene catabolic pathway. Catalyzes the reversible glutathione-dependent isomerization of 2-hydroxychromene-2-carboxylate (HCCA) to trans-O-hydroxybenzylidenepyruvate (THBPA).[1] [2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

References

  1. ↑ Eaton RW. Organization and evolution of naphthalene catabolic pathways: sequence of the DNA encoding 2-hydroxychromene-2-carboxylate isomerase and trans-o-hydroxybenzylidenepyruvate hydratase-aldolase from the NAH7 plasmid. J Bacteriol. 1994 Dec;176(24):7757-62. PMID:8002605
  2. ↑ Eaton RW, Chapman PJ. Bacterial metabolism of naphthalene: construction and use of recombinant bacteria to study ring cleavage of 1,2-dihydroxynaphthalene and subsequent reactions. J Bacteriol. 1992 Dec;174(23):7542-54. PMID:1447127

2ime, resolution 1.70Å

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