View source for 5h5t


==Crystal structure of the flagellar cap protein FliD D2-D3 domains from Salmonella Typhimurium==
<StructureSection load='5h5t' size='340' side='right'caption='[[5h5t]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5h5t]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_Typhimurium Salmonella enterica subsp. enterica serovar Typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5H5T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5H5T 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]] 2.5&#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=5h5t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5h5t OCA], [https://pdbe.org/5h5t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5h5t RCSB], [https://www.ebi.ac.uk/pdbsum/5h5t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5h5t ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FLID_SALTY FLID_SALTY] Required for the morphogenesis and for the elongation of the flagellar filament by facilitating polymerization of the flagellin monomers at the tip of growing filament. Forms a capping structure, which prevents flagellin subunits (transported through the central channel of the flagellum) from leaking out without polymerization at the distal end.
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== Publication Abstract from PubMed ==
FliD is a self-oligomerizing structural protein that caps the growing end of the bacterial flagellar filament. FliD also plays a key role in the flagellar system by continuously adding a new flagellin protein to the tip of the filament. To structurally characterize FliD oligomerization and to provide a FliD-mediated flagellin polymerization mechanism, we have determined the crystal structures of FliD proteins from Escherichia coli and Salmonella enterica serovar Typhimurium (ecFliD and stFliD, respectively). ecFliD consists of three domains (D1, D2, and D3) and forms a hexamer plate of the D2 and D3 domains that resembles a six-pointed star with legs consisting of the D1 domain. In contrast, the D2 and D3 domains of stFliD assemble into a pentamer as a five-pointed star plate. Despite their distinct oligomeric states, ecFliD and stFliD engage a common molecular surface for oligomerization. FliD also features interdomain and intersubunit flexibility, suggesting that FliD reorganizes its domains and adjacent subunits depending on the FliD binding partner. The similarity of the FliD shape to flagellin and the structural dynamics of FliD led us to propose a FliD-catalyzed filament elongation mechanism. In this model, FliD occupies a position in place of a nascent flagellin until the flagellin reaches the growing end of the filament, and then, FliD moves aside to repeat the positional replacement.

Self-Oligomerizing Structure of the Flagellar Cap Protein FliD and Its Implication in Filament Assembly.,Song WS, Cho SY, Hong HJ, Park SC, Yoon SI J Mol Biol. 2017 Feb 6. pii: S0022-2836(17)30065-7. doi:, 10.1016/j.jmb.2017.02.001. PMID:28179186<ref>PMID:28179186</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 5h5t" style="background-color:#fffaf0;"></div>

==See Also==
*[[Flagellar protein 3D structures|Flagellar protein 3D structures]]
*[[Flagellar proteins|Flagellar proteins]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Salmonella enterica subsp. enterica serovar Typhimurium]]
[[Category: Cho SY]]
[[Category: Hong HJ]]
[[Category: Song WS]]
[[Category: Yoon SI]]