6rgv

<table><tr><td colspan='2'>[[6rgv]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RGV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6RGV FirstGlance]. <br>

</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1io1|1io1]]</td></tr>

<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=6rgv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6rgv OCA], [http://pdbe.org/6rgv PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6rgv RCSB], [http://www.ebi.ac.uk/pdbsum/6rgv PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6rgv ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/A0A0H3NEZ8_SALTS A0A0H3NEZ8_SALTS]] Flagellin is the subunit protein which polymerizes to form the filaments of bacterial flagella.[RuleBase:RU362073]

Bacterial flagellar filaments are assembled by tens of thousands flagellin subunits, forming 11 helically arranged protofilaments. Each protofilament can take either of the two bistable forms L-type or R-type, having slightly different conformations and inter-protofilaments interactions. By mixing different ratios of L-type and R-type protofilaments, flagella adopt multiple filament polymorphs and promote bacterial motility. In this study, we investigated the hydrogen bonding networks at the flagellin crystal packing interface in Salmonella enterica serovar typhimurium (S. typhimurium) by site-directed mutagenesis of each hydrogen bonded residue. We identified three flagellin mutants D108A, N133A and D152A that were non-motile despite their fully assembled flagella. Mutants D108A and D152A trapped their flagellar filament into inflexible right-handed polymorphs, which resemble the previously predicted 3L/8R and 4L/7R helical forms in Calladine's model but have never been reported in vivo. Mutant N133A produces floppy flagella that transform flagellar polymorphs in a disordered manner, preventing the formation of flagellar bundles. Further, we found that the hydrogen bonding interactions around these residues are conserved and coupled to flagellin L/R transition. Therefore, we demonstrate that the hydrogen bonding networks formed around flagellin residues D108, N133 and D152 greatly contribute to flagellar bending, flexibility, polymorphisms and bacterial motility.

 

== References ==

[[Category: Kolbe, M]]

[[Category: Lokareddy, R K]]

[[Category: Lunelli, M]]

[[Category: Bacterial motility]]

[[Category: Cell adhesion]]

[[Category: Structural protein]]