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New page: ==Structure of D141A variant of B. pseudomallei KatG== <StructureSection load='5syh' size='340' side='right' caption='5syh, resolution 1.65Å' scene=''> == Structu... |
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==Structure of D141A variant of B. pseudomallei KatG== | ==Structure of D141A variant of B. pseudomallei KatG== | ||
<StructureSection load='5syh' size='340' side='right' caption='[[5syh]], [[Resolution|resolution]] 1.65Å' scene=''> | <StructureSection load='5syh' size='340' side='right'caption='[[5syh]], [[Resolution|resolution]] 1.65Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[5syh]] is a 2 chain structure. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4ka5 4ka5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5SYH OCA]. For a <b>guided tour on the structure components</b> use [ | <table><tr><td colspan='2'>[[5syh]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Burkholderia_pseudomallei_1710b Burkholderia pseudomallei 1710b]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4ka5 4ka5]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5SYH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5SYH FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=OXY:OXYGEN+MOLECULE'>OXY</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.65Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=MPD:(4S)-2-METHYL-2,4-PENTANEDIOL'>MPD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=OXY:OXYGEN+MOLECULE'>OXY</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=TOX:1-HYDROPEROXY-L-TRYPTOPHAN'>TOX</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=5syh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5syh OCA], [https://pdbe.org/5syh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5syh RCSB], [https://www.ebi.ac.uk/pdbsum/5syh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5syh ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/KATG_BURP1 KATG_BURP1] Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity. | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Catalase peroxidases (KatG's) are bifunctional heme proteins that can disproportionate hydrogen peroxide (catalatic reaction) despite their structural dissimilarity with monofunctional catalases. Using X-ray crystallography and QM/MM calculations, we demonstrate that the catalatic reaction of KatG's involves deprotonation of the active-site Trp, which plays a role similar to that of the distal His in monofunctional catalases. The interaction of a nearby mobile arginine with the distal Met-Tyr-Trp essential adduct (in/out) acts as an electronic switch, triggering deprotonation of the adduct Trp. | |||
An ionizable active-site tryptophan imparts catalase activity to a peroxidase core.,Loewen PC, Carpena X, Vidossich P, Fita I, Rovira C J Am Chem Soc. 2014 May 21;136(20):7249-52. doi: 10.1021/ja502794e. Epub 2014 May, 7. PMID:24785434<ref>PMID:24785434</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 5syh" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Catalase 3D structures|Catalase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Burkholderia pseudomallei 1710b]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Loewen PC]] | ||
Latest revision as of 15:50, 4 October 2023
Structure of D141A variant of B. pseudomallei KatGStructure of D141A variant of B. pseudomallei KatG
Structural highlights
FunctionKATG_BURP1 Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity. Publication Abstract from PubMedCatalase peroxidases (KatG's) are bifunctional heme proteins that can disproportionate hydrogen peroxide (catalatic reaction) despite their structural dissimilarity with monofunctional catalases. Using X-ray crystallography and QM/MM calculations, we demonstrate that the catalatic reaction of KatG's involves deprotonation of the active-site Trp, which plays a role similar to that of the distal His in monofunctional catalases. The interaction of a nearby mobile arginine with the distal Met-Tyr-Trp essential adduct (in/out) acts as an electronic switch, triggering deprotonation of the adduct Trp. An ionizable active-site tryptophan imparts catalase activity to a peroxidase core.,Loewen PC, Carpena X, Vidossich P, Fita I, Rovira C J Am Chem Soc. 2014 May 21;136(20):7249-52. doi: 10.1021/ja502794e. Epub 2014 May, 7. PMID:24785434[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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