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5f4b

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==Structure of B. abortus WrbA-related protein A (WrpA)==
==Structure of B. abortus WrbA-related protein A (WrpA)==
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<StructureSection load='5f4b' size='340' side='right' caption='[[5f4b]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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<StructureSection load='5f4b' size='340' side='right'caption='[[5f4b]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[5f4b]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5F4B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5F4B FirstGlance]. <br>
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<table><tr><td colspan='2'>[[5f4b]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Brucella_abortus_2308 Brucella abortus 2308]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5F4B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5F4B FirstGlance]. <br>
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</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=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.498&#8491;</td></tr>
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<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/NAD(P)H_dehydrogenase_(quinone) NAD(P)H dehydrogenase (quinone)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.6.5.2 1.6.5.2] </span></td></tr>
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<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=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene></td></tr>
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<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=5f4b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5f4b OCA], [http://pdbe.org/5f4b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5f4b RCSB], [http://www.ebi.ac.uk/pdbsum/5f4b PDBsum]</span></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5f4b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5f4b OCA], [https://pdbe.org/5f4b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5f4b RCSB], [https://www.ebi.ac.uk/pdbsum/5f4b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5f4b ProSAT]</span></td></tr>
</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/NQOR_BRUA2 NQOR_BRUA2]
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The general stress response (GSR) system of the intracellular pathogen Brucella abortus controls transcription of approximately 100 genes in response to a range of stress cues. The core genetic regulatory components of the GSR are required for B. abortus survival under non-optimal growth conditions in vitro, and for maintenance of chronic infection in an in vivo mouse model. The functions of the majority of the genes in the GSR transcriptional regulon remain undefined. bab1_1070 is among the most highly regulated genes in this regulon: its transcription is activated 20-30 fold by the GSR system under oxidative conditions in vitro. We have solved crystal structures of Bab1_1070 and demonstrate that it forms a homotetrameric complex that resembles WrbA-type NADH:quinone oxidoreductases, which are members of the flavodoxin protein family. However, B. abortus WrbA-related protein (WrpA) does not bind flavin cofactors with high affinity and does not function as an NADH:quinone oxidoreductase in vitro. Soaking crystals with flavin mononucleotide (FMN) revealed a likely low-affinity binding site adjacent to the canonical WrbA flavin binding site. Deletion of wrpA (DeltawrpA) does not compromise cell survival under acute oxidative stress in vitro or attenuate infection in cell-based or mouse models. However, a DeltawrpA strain does elicit increased splenomegaly in a mouse model suggesting that WrpA modulates B. abortus interaction with its mammalian host. Despite high structural homology with canonical WrbA proteins, we propose that B. abortus WrpA represents a functionally-distinct member of the diverse flavodoxin family. IMPORTANCE: Brucella abortus is an etiological agent of brucellosis, which is among the most common zoonotic diseases worldwide. The general stress response (GSR) regulatory system of B. abortus controls transcription of approximately 100 genes and is required for maintenance of chronic infection in a murine model; the majority of GSR-regulated genes remain uncharacterized. We present in vitro and in vivo functional and structural analyses of WrpA, whose expression is strongly induced by GSR under oxidative conditions. Though WrpA is structurally related to NADH:quinone oxidoreductases, it does not bind redox cofactors in solution, nor does it exhibit oxidoreductase activity in vitro. However, WrpA does affect spleen inflammation in a murine infection model. Our data provide evidence that WrpA forms a new functional class of WrbA/flavodoxin-family proteins.
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WrpA is an atypical flavodoxin-family protein under regulatory control of the Brucella abortus general stress response system.,Herrou J, Czyz DM, Willett JW, Kim HS, Chhor G, Babnigg G, Kim Y, Crosson S J Bacteriol. 2016 Feb 8. pii: JB.00982-15. PMID:26858101<ref>PMID:26858101</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 5f4b" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: Babnigg, G]]
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[[Category: Brucella abortus 2308]]
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[[Category: Chhor, G]]
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[[Category: Large Structures]]
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[[Category: Crosson, S]]
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[[Category: Babnigg G]]
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[[Category: Czyz, D]]
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[[Category: Chhor G]]
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[[Category: Endres, M]]
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[[Category: Crosson S]]
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[[Category: Herrou, J]]
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[[Category: Czyz D]]
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[[Category: Joachimiak, A]]
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[[Category: Endres M]]
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[[Category: Kim, H S]]
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[[Category: Herrou J]]
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[[Category: Kim, Y]]
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[[Category: Joachimiak A]]
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[[Category: Structural genomic]]
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[[Category: Kim HS]]
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[[Category: Willett, J W]]
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[[Category: Kim Y]]
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[[Category: Brucella]]
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[[Category: Willett JW]]
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[[Category: Mcsg]]
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[[Category: Nadh:quinone oxidoreductase]]
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[[Category: Oxidoreductase]]
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[[Category: Psi-biology]]
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[[Category: Tetramer]]
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[[Category: Wrba]]
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Current revision

Structure of B. abortus WrbA-related protein A (WrpA)

PDB ID 5f4b

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