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<StructureSection load='3qou' size='340' side='right'caption='[[3qou]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
<StructureSection load='3qou' size='340' side='right'caption='[[3qou]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3qou]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QOU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QOU FirstGlance]. <br>
<table><tr><td colspan='2'>[[3qou]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QOU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3QOU FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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]] 1.8&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MLY:N-DIMETHYL-LYSINE'>MLY</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MLY:N-DIMETHYL-LYSINE'>MLY</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">YbbN ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</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=3qou FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qou OCA], [https://pdbe.org/3qou PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3qou RCSB], [https://www.ebi.ac.uk/pdbsum/3qou PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3qou 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=3qou FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qou OCA], [https://pdbe.org/3qou PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3qou RCSB], [https://www.ebi.ac.uk/pdbsum/3qou PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3qou ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Function ==
== Publication Abstract from PubMed ==
[https://www.uniprot.org/uniprot/CNOX_ECOLI CNOX_ECOLI] Chaperedoxin that combines a chaperone activity with a redox-protective function (PubMed:16563353, PubMed:18657513, PubMed:29754824). Involved in the protection against hypochlorous acid (HOCl), the active ingredient of bleach, which kills bacteria by causing protein aggregation (PubMed:29754824). Functions as an efficient holdase chaperone that protects the substrates of the major folding systems GroEL/GroES and DnaK/DnaJ/GrpE from aggregation. In addition, it prevents the irreversible oxidation of its substrates through the formation of mixed disulfide complexes (PubMed:29754824). After bleach stress, it transfers its substrates to the GroEL/GroES and DnaK/DnaJ/GrpE foldases (PubMed:29754824). Lacks oxidoreductase activity (PubMed:21498507, PubMed:29754824).<ref>PMID:16563353</ref> <ref>PMID:18657513</ref> <ref>PMID:21498507</ref> <ref>PMID:29754824</ref>  
Many proteins contain a thioredoxin (Trx)-like domain fused with one or more partner domains that diversify protein function by the modular construction of new molecules. The Escherichia coli protein YbbN is a Trx-like protein that contains a C-terminal domain with low homology to tetratricopeptide repeat motifs. YbbN has been proposed to act as a chaperone or co-chaperone that aids in heat stress response and DNA synthesis. We report the crystal structure of YbbN, which is an elongated molecule with a mobile Trx domain and four atypical tetratricopeptide repeat motifs. The Trx domain lacks a canonical CXXC active site architecture and is not a functional oxidoreductase. A variety of proteins in E. coli interact with YbbN, including multiple ribosomal protein subunits and a strong interaction with GroEL. YbbN acts as a mild inhibitor of GroESL chaperonin function and ATPase activity, suggesting that it is a negative regulator of the GroESL system. Combined with previous observations that YbbN enhances the DnaK-DnaJ-GrpE chaperone system, we propose that YbbN coordinately regulates the activities of these two prokaryotic chaperones, thereby helping to direct client protein traffic initially to DnaK. Therefore, YbbN may play a role in integrating the activities of different chaperone pathways in E. coli and related bacteria.
 
Escherichia coli Thioredoxin-like Protein YbbN Contains an Atypical Tetratricopeptide Repeat Motif and Is a Negative Regulator of GroEL.,Lin J, Wilson MA J Biol Chem. 2011 Jun 3;286(22):19459-69. Epub 2011 Apr 15. PMID:21498507<ref>PMID:21498507</ref>
 
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3qou" style="background-color:#fffaf0;"></div>
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Ecoli]]
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Lin, J]]
[[Category: Lin J]]
[[Category: Wilson, M A]]
[[Category: Wilson MA]]
[[Category: Lysine dimethylation]]
[[Category: Protein binding]]
[[Category: Tetratricopeptide repeat]]
[[Category: Thioredoxin-like fold]]

Latest revision as of 11:53, 14 March 2024

Crystal Structure of E. coli YbbN

3qou, resolution 1.80Å

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