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==Structure of the Isochorismate-Pyruvate Lyase from Pseudomonas aerugionsa with Bound Salicylate and Pyruvate==
==Structure of the Isochorismate-Pyruvate Lyase from Pseudomonas aerugionsa with Bound Salicylate and Pyruvate==
<StructureSection load='3rem' size='340' side='right' caption='[[3rem]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
<StructureSection load='3rem' size='340' side='right'caption='[[3rem]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3rem]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_aeruginosus"_(schroeter_1872)_trevisan_1885 "bacillus aeruginosus" (schroeter 1872) trevisan 1885]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3REM OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3REM FirstGlance]. <br>
<table><tr><td colspan='2'>[[3rem]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3REM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3REM FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PYR:PYRUVIC+ACID'>PYR</scene>, <scene name='pdbligand=SAL:2-HYDROXYBENZOIC+ACID'>SAL</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]] 1.95&#8491;</td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PA4230, pchB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=287 "Bacillus aeruginosus" (Schroeter 1872) Trevisan 1885])</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PYR:PYRUVIC+ACID'>PYR</scene>, <scene name='pdbligand=SAL:2-HYDROXYBENZOIC+ACID'>SAL</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=3rem FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rem OCA], [http://pdbe.org/3rem PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3rem RCSB], [http://www.ebi.ac.uk/pdbsum/3rem PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3rem 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=3rem FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rem OCA], [https://pdbe.org/3rem PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rem RCSB], [https://www.ebi.ac.uk/pdbsum/3rem PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rem ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/PCHB_PSEAE PCHB_PSEAE]] Has isochorismate-pyruvate lyase activity. Probably involved in the conversion of isochorismate to salicylate and pyruvate.
[https://www.uniprot.org/uniprot/PCHB_PSEAE PCHB_PSEAE] Has isochorismate-pyruvate lyase activity. Probably involved in the conversion of isochorismate to salicylate and pyruvate.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
An isochorismate-pyruvate lyase with adventitious chorismate mutase activity from Pseudomonas aerugionsa (PchB) achieves catalysis of both pericyclic reactions in part by the stabilization of reactive conformations and in part by electrostatic transition-state stabilization. When the active site loop Lys42 is mutated to histidine, the enzyme develops a pH dependence corresponding to a loss of catalytic power upon deprotonation of the histidine. Structural data indicate that the change is not due to changes in active site architecture, but due to the difference in charge at this key site. With loss of the positive charge on the K42H side chain at high pH, the enzyme retains lyase activity at approximately 100-fold lowered catalytic efficiency but loses detectable mutase activity. We propose that both substrate organization and electrostatic transition state stabilization contribute to catalysis. However, the dominant reaction path for catalysis is dependent on reaction conditions, which influence the electrostatic properties of the enzyme active site amino acid side chains.


pH Dependence of Catalysis by Pseudomonas aeruginosa Isochorismate-Pyruvate Lyase: Implications for Transition State Stabilization and the Role of Lysine 42.,Olucha J, Ouellette AN, Luo Q, Lamb AL Biochemistry. 2011 Jul 22. PMID:21751784<ref>PMID:21751784</ref>
==See Also==
 
*[[Isochorismate pyruvate lyase|Isochorismate pyruvate lyase]]
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3rem" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Lamb, A L]]
[[Category: Large Structures]]
[[Category: Luo, Q]]
[[Category: Pseudomonas aeruginosa]]
[[Category: Olucha, J]]
[[Category: Lamb AL]]
[[Category: Ouellette, A N]]
[[Category: Luo Q]]
[[Category: Intertwined dimer]]
[[Category: Olucha J]]
[[Category: Lyase]]
[[Category: Ouellette AN]]
[[Category: Mutase]]

Latest revision as of 15:20, 14 March 2024

Structure of the Isochorismate-Pyruvate Lyase from Pseudomonas aerugionsa with Bound Salicylate and PyruvateStructure of the Isochorismate-Pyruvate Lyase from Pseudomonas aerugionsa with Bound Salicylate and Pyruvate

Structural highlights

3rem is a 2 chain structure with sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.95Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PCHB_PSEAE Has isochorismate-pyruvate lyase activity. Probably involved in the conversion of isochorismate to salicylate and pyruvate.

See Also

3rem, resolution 1.95Å

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