5j9c: Difference between revisions
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==Crystal structure of peroxiredoxin Asp f3 C31S/C61S variant== | |||
<StructureSection load='5j9c' size='340' side='right'caption='[[5j9c]], [[Resolution|resolution]] 1.96Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5j9c]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_fumigatus_Af293 Aspergillus fumigatus Af293]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5J9C OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5J9C FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.956Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=5j9c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5j9c OCA], [https://pdbe.org/5j9c PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5j9c RCSB], [https://www.ebi.ac.uk/pdbsum/5j9c PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5j9c ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/PRX5_ASPFU PRX5_ASPFU] Thiol-specific peroxidase that catalyzes the reduction of hydrogen peroxide and organic hydroperoxides to water and alcohols, respectively. Plays a role in cell protection against oxidative stress by detoxifying peroxides and as sensor of hydrogen peroxide-mediated signaling events. Required for virulence.<ref>PMID:27624005</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Invasive aspergillosis and other fungal infections occur in immunocompromised individuals, including patients who received blood-building stem cell transplants, patients with chronic granulomatous disease (CGD), and others. Production of reactive oxygen species (ROS) by immune cells, which incidentally is defective in CGD patients, is considered to be a fundamental process in inflammation and antifungal immune response. Here we show that the peroxiredoxin Asp f3 of Aspergillus fumigatus inactivates ROS. We report the crystal structure and the catalytic mechanism of Asp f3, a two-cysteine type peroxiredoxin. The latter exhibits a thioredoxin fold and a homodimeric structure with two intermolecular disulfide bonds in its oxidized state. Replacement of the Asp f3 cysteines with serine residues retained its dimeric structure, but diminished Asp f3's peroxidase activity, and extended the alpha-helix with the former peroxidatic cysteine residue C61 by six residues. The asp f3 deletion mutant was sensitive to ROS, and this phenotype was rescued by ectopic expression of Asp f3. Furthermore, we showed that deletion of asp f3 rendered A. fumigatus avirulent in a mouse model of pulmonary aspergillosis. The conserved expression of Asp f3 homologs in medically relevant molds and yeasts prompts future evaluation of Asp f3 as a potential therapeutic target. | |||
The Crystal Structure of Peroxiredoxin Asp f3 Provides Mechanistic Insight into Oxidative Stress Resistance and Virulence of Aspergillus fumigatus.,Hillmann F, Bagramyan K, Strassburger M, Heinekamp T, Hong TB, Bzymek KP, Williams JC, Brakhage AA, Kalkum M Sci Rep. 2016 Sep 14;6:33396. doi: 10.1038/srep33396. PMID:27624005<ref>PMID:27624005</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 5j9c" style="background-color:#fffaf0;"></div> | ||
[[Category: Bagramyan | |||
[[Category: | ==See Also== | ||
[[Category: | *[[Peroxiredoxin 3D structures|Peroxiredoxin 3D structures]] | ||
[[Category: Kalkum | == References == | ||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Aspergillus fumigatus Af293]] | |||
[[Category: Large Structures]] | |||
[[Category: Bagramyan K]] | |||
[[Category: Bzymek KP]] | |||
[[Category: Hong TB]] | |||
[[Category: Kalkum M]] | |||
[[Category: Williams JC]] | |||
Latest revision as of 13:55, 6 September 2023
Crystal structure of peroxiredoxin Asp f3 C31S/C61S variantCrystal structure of peroxiredoxin Asp f3 C31S/C61S variant
Structural highlights
FunctionPRX5_ASPFU Thiol-specific peroxidase that catalyzes the reduction of hydrogen peroxide and organic hydroperoxides to water and alcohols, respectively. Plays a role in cell protection against oxidative stress by detoxifying peroxides and as sensor of hydrogen peroxide-mediated signaling events. Required for virulence.[1] Publication Abstract from PubMedInvasive aspergillosis and other fungal infections occur in immunocompromised individuals, including patients who received blood-building stem cell transplants, patients with chronic granulomatous disease (CGD), and others. Production of reactive oxygen species (ROS) by immune cells, which incidentally is defective in CGD patients, is considered to be a fundamental process in inflammation and antifungal immune response. Here we show that the peroxiredoxin Asp f3 of Aspergillus fumigatus inactivates ROS. We report the crystal structure and the catalytic mechanism of Asp f3, a two-cysteine type peroxiredoxin. The latter exhibits a thioredoxin fold and a homodimeric structure with two intermolecular disulfide bonds in its oxidized state. Replacement of the Asp f3 cysteines with serine residues retained its dimeric structure, but diminished Asp f3's peroxidase activity, and extended the alpha-helix with the former peroxidatic cysteine residue C61 by six residues. The asp f3 deletion mutant was sensitive to ROS, and this phenotype was rescued by ectopic expression of Asp f3. Furthermore, we showed that deletion of asp f3 rendered A. fumigatus avirulent in a mouse model of pulmonary aspergillosis. The conserved expression of Asp f3 homologs in medically relevant molds and yeasts prompts future evaluation of Asp f3 as a potential therapeutic target. The Crystal Structure of Peroxiredoxin Asp f3 Provides Mechanistic Insight into Oxidative Stress Resistance and Virulence of Aspergillus fumigatus.,Hillmann F, Bagramyan K, Strassburger M, Heinekamp T, Hong TB, Bzymek KP, Williams JC, Brakhage AA, Kalkum M Sci Rep. 2016 Sep 14;6:33396. doi: 10.1038/srep33396. PMID:27624005[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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