View source for 4xoa


==Crystal structure of a FimH*DsG complex from E.coli K12 in space group P1==
<StructureSection load='4xoa' size='340' side='right'caption='[[4xoa]], [[Resolution|resolution]] 2.54&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4xoa]] is a 8 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=4XOA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4XOA 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]] 2.541&#8491;</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=4xoa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xoa OCA], [https://pdbe.org/4xoa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4xoa RCSB], [https://www.ebi.ac.uk/pdbsum/4xoa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4xoa ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FIMG_ECOLI FIMG_ECOLI] Involved in regulation of length and mediation of adhesion of type 1 fimbriae (but not necessary for the production of fimbriae). Involved in the integration of FimH in the fimbriae.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Ligand-receptor interactions that are reinforced by mechanical stress, so-called catch-bonds, play a major role in cell-cell adhesion. They critically contribute to widespread urinary tract infections by pathogenic Escherichia coli strains. These pathogens attach to host epithelia via the adhesin FimH, a two-domain protein at the tip of type I pili recognizing terminal mannoses on epithelial glycoproteins. Here we establish peptide-complemented FimH as a model system for fimbrial FimH function. We reveal a three-state mechanism of FimH catch-bond formation based on crystal structures of all states, kinetic analysis of ligand interaction and molecular dynamics simulations. In the absence of tensile force, the FimH pilin domain allosterically accelerates spontaneous ligand dissociation from the FimH lectin domain by 100,000-fold, resulting in weak affinity. Separation of the FimH domains under stress abolishes allosteric interplay and increases the affinity of the lectin domain. Cell tracking demonstrates that rapid ligand dissociation from FimH supports motility of piliated E. coli on mannosylated surfaces in the absence of shear force.

Catch-bond mechanism of the bacterial adhesin FimH.,Sauer MM, Jakob RP, Eras J, Baday S, Eris D, Navarra G, Berneche S, Ernst B, Maier T, Glockshuber R Nat Commun. 2016 Mar 7;7:10738. doi: 10.1038/ncomms10738. PMID:26948702<ref>PMID:26948702</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4xoa" style="background-color:#fffaf0;"></div>

==See Also==
*[[Adhesin 3D structures|Adhesin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Eras J]]
[[Category: Glockshuber R]]
[[Category: Jakob RP]]
[[Category: Maier T]]