4fq0

From Proteopedia

(Difference between revisions)

Revision as of 08:48, 4 August 2016

Crystal structure of FliG-FliM complex from H. pylori

Structural highlights

4fq0 is a 4 chain structure with sequence from Campylobacter pylori. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	3usw, 3usy
Gene:	FliM (Campylobacter pylori), FliG (Campylobacter pylori)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[FLIG_HELPY] One of the proteins that forms a switch complex that is proposed to be located at the base of the basal body. This complex interacts with chemotaxis proteins (such as CheY) in addition to contacting components of the motor that determine the direction of flagellar rotation. Required for flagellum synthesis and motility. In H.pylori four flagellar switch proteins are encoded, FliG, FliM, FliN and FliY.^[1] ^[2]

Publication Abstract from PubMed

FliG and FliM are switch proteins that regulate the rotation and switching of the flagellar motor. Several assembly models for FliG and FliM have recently been proposed; however, it remains unclear whether the assembly of the switch proteins is conserved among different bacterial species. We applied a combination of pull-down, thermodynamic and structural analyses to characterize the FliM-FliG association from the mesophilic bacterium Helicobacter pylori. FliM binds to FliG with micromolar binding affinity, and their interaction is mediated through the middle domain of FliG (FliGM ), which contains the EHPQR motif. Crystal structures of the middle domain of H. pylori FliM (FliMM ) and FliGM -FliMM complex revealed that FliG binding triggered a conformational change of the FliM alpha3-alpha1' loop, especially Asp130 and Arg144. We furthermore showed that various highly conserved residues in this region are required for FliM-FliG complex formation. Although the FliM-FliG complex structure displayed a conserved binding mode when compared with Thermotoga maritima, variable residues were identified that may contribute to differential binding affinities across bacterial species. Comparison of the thermodynamic parameters of FliG-FliM interactions between H. pylori and Escherichia coli suggests that molecular basis and binding properties of FliM to FliG is likely different between these two species.

Structural basis of FliG-FliM interaction in Helicobacter pylori.,Lam KH, Lam WW, Wong JY, Chan LC, Kotaka M, Ling TK, Jin DY, Ottemann KM, Au SW Mol Microbiol. 2013 Apr 24. doi: 10.1111/mmi.12222. PMID:23614777^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Allan E, Dorrell N, Foynes S, Anyim M, Wren BW. Mutational analysis of genes encoding the early flagellar components of Helicobacter pylori: evidence for transcriptional regulation of flagellin A biosynthesis. J Bacteriol. 2000 Sep;182(18):5274-7. PMID:10960117
↑ Lam KH, Ip WS, Lam YW, Chan SO, Ling TK, Au SW. Multiple conformations of the FliG C-terminal domain provide insight into flagellar motor switching. Structure. 2012 Feb 8;20(2):315-25. PMID:22325779 doi:10.1016/j.str.2011.11.020
↑ Lam KH, Lam WW, Wong JY, Chan LC, Kotaka M, Ling TK, Jin DY, Ottemann KM, Au SW. Structural basis of FliG-FliM interaction in Helicobacter pylori. Mol Microbiol. 2013 Apr 24. doi: 10.1111/mmi.12222. PMID:23614777 doi:10.1111/mmi.12222

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4fq0"

@@ Line 1: / Line 1: @@
 ==Crystal structure of FliG-FliM complex from H. pylori==
 <StructureSection load='4fq0' size='340' side='right' caption='[[4fq0]], [[Resolution|resolution]] 2.82&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4fq0]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Helicobacter_pylori_26695 Helicobacter pylori 26695]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4FQ0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4FQ0 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4fq0]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Campylobacter_pylori Campylobacter pylori]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4FQ0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4FQ0 FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3usw|3usw]], [[3usy|3usy]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FliM ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=85962 Helicobacter pylori 26695]), FliG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=85962 Helicobacter pylori 26695])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">FliM ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=85962 Campylobacter pylori]), FliG ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=85962 Campylobacter pylori])</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=4fq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4fq0 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4fq0 RCSB], [http://www.ebi.ac.uk/pdbsum/4fq0 PDBsum]</span></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=4fq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4fq0 OCA], [http://pdbe.org/4fq0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4fq0 RCSB], [http://www.ebi.ac.uk/pdbsum/4fq0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4fq0 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4fq0" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Helicobacter pylori 26695]]
+[[Category: Campylobacter pylori]]
 [[Category: Au, S W.N]]
 [[Category: Lam, K H]]

4fq0

From Proteopedia

Revision as of 08:48, 4 August 2016

Crystal structure of FliG-FliM complex from H. pylori

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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