4eo3: Difference between revisions
No edit summary |
No edit summary |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
==Peroxiredoxin Nitroreductase Fusion Enzyme== | ==Peroxiredoxin Nitroreductase Fusion Enzyme== | ||
<StructureSection load='4eo3' size='340' side='right' caption='[[4eo3]], [[Resolution|resolution]] 1.65Å' scene=''> | <StructureSection load='4eo3' size='340' side='right'caption='[[4eo3]], [[Resolution|resolution]] 1.65Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4eo3]] is a 2 chain structure with sequence from [ | <table><tr><td colspan='2'>[[4eo3]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima Thermotoga maritima]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4EO3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4EO3 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene>, <scene name='pdbligand=MRD:(4R)-2-METHYLPENTANE-2,4-DIOL'>MRD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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]] 1.649Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene>, <scene name='pdbligand=MRD:(4R)-2-METHYLPENTANE-2,4-DIOL'>MRD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4eo3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eo3 OCA], [https://pdbe.org/4eo3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4eo3 RCSB], [https://www.ebi.ac.uk/pdbsum/4eo3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4eo3 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q9WYL7_THEMA Q9WYL7_THEMA] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| Line 15: | Line 18: | ||
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> | </div> | ||
<div class="pdbe-citations 4eo3" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Thermotoga maritima]] | [[Category: Thermotoga maritima]] | ||
[[Category: Haouz | [[Category: Haouz A]] | ||
[[Category: Jacquot | [[Category: Jacquot J-P]] | ||
[[Category: Navaza | [[Category: Navaza A]] | ||
[[Category: Prosper | [[Category: Prosper P]] | ||
[[Category: Rouhier | [[Category: Rouhier N]] | ||
Latest revision as of 09:56, 27 November 2024
Peroxiredoxin Nitroreductase Fusion EnzymePeroxiredoxin Nitroreductase Fusion Enzyme
Structural highlights
FunctionPublication Abstract from PubMedAbstract Three peroxiredoxins (Prxs) were identified in Thermotoga maritima, which possesses neither glutathione nor typical thioredoxins: one of the Prx6 class; one 2-Cys PrxBCP; and a unique hybrid protein containing an N-terminal 1-Cys PrxBCP domain fused to a flavin mononucleotide-containing nitroreductase (Ntr) domain. No peroxidase activity was detected for Prx6, whereas both bacterioferritin comigratory proteins (BCPs) were regenerated by a NADH/thioredoxin reductase/glutaredoxin (Grx)-like system, constituting a unique peroxide removal system. Only two of the three Grx-like proteins were able to support peroxidase activity. The inability of TmGrx1 to regenerate oxidized 2-Cys PrxBCP probably results from the thermodynamically unfavorable difference in their disulfide/dithiol E(m) values, -150 and -315 mV, respectively. Mutagenesis of the Prx-Ntr fusion, combined with kinetic and structural analyses, indicated that electrons are not transferred between its two domains. However, their separate activities could function in a complementary manner, with peroxide originating from the chromate reductase activity of the Ntr domain reduced by the Prx domain. In the Absence of Thioredoxins, What Are the Reductants for Peroxiredoxins in Thermotoga maritima?,Couturier J, Prosper P, Winger AM, Hecker A, Hirasawa M, Knaff DB, Gans P, Jacquot JP, Navaza A, Haouz A, Rouhier N Antioxid Redox Signal. 2012 Sep 24. PMID:22866991[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
|
| ||||||||||||||||||