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| | <StructureSection load='3imp' size='340' side='right'caption='[[3imp]], [[Resolution|resolution]] 2.50Å' scene=''> | | <StructureSection load='3imp' size='340' side='right'caption='[[3imp]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3imp]] is a 12 chain structure with sequence from [https://en.wikipedia.org/wiki/Campylobacter_pylori Campylobacter pylori]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3IMP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3IMP FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3imp]] is a 12 chain structure with sequence from [https://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=3IMP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3IMP FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</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]] 2.5Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3cyp|3cyp]], [[3cyq|3cyq]]</div></td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">motB ([https://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'>[https://proteopedia.org/fgij/fg.htm?mol=3imp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3imp OCA], [https://pdbe.org/3imp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3imp RCSB], [https://www.ebi.ac.uk/pdbsum/3imp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3imp 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=3imp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3imp OCA], [https://pdbe.org/3imp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3imp RCSB], [https://www.ebi.ac.uk/pdbsum/3imp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3imp ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/MOTB_HELPY MOTB_HELPY]] MotA and MotB comprise the stator element of the flagellar motor complex. Required for the rotation of the flagellar motor. Might be a linker that fastens the torque-generating machinery to the cell wall (By similarity).
| + | [https://www.uniprot.org/uniprot/MOTB_HELPY MOTB_HELPY] MotA and MotB comprise the stator element of the flagellar motor complex. Required for the rotation of the flagellar motor. Might be a linker that fastens the torque-generating machinery to the cell wall (By similarity). |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Campylobacter pylori]] | + | [[Category: Helicobacter pylori 26695]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Roujeinikova, A]] | + | [[Category: Roujeinikova A]] |
| - | [[Category: Bacterial flagellum]]
| + | |
| - | [[Category: Cell inner membrane]]
| + | |
| - | [[Category: Cell membrane]]
| + | |
| - | [[Category: Chemotaxis]]
| + | |
| - | [[Category: Flagellar rotation]]
| + | |
| - | [[Category: Inner membrane]]
| + | |
| - | [[Category: Membrane]]
| + | |
| - | [[Category: Membrane protein]]
| + | |
| - | [[Category: Peptidoglycan binding]]
| + | |
| - | [[Category: Transmembrane]]
| + | |
| Structural highlights
Function
MOTB_HELPY MotA and MotB comprise the stator element of the flagellar motor complex. Required for the rotation of the flagellar motor. Might be a linker that fastens the torque-generating machinery to the cell wall (By similarity).
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
BACKGROUND: The C-terminal domain of MotB (MotB-C) shows high sequence similarity to outer membrane protein A and related peptidoglycan (PG)-binding proteins. It is believed to anchor the power-generating MotA/MotB stator unit of the bacterial flagellar motor to the peptidoglycan layer of the cell wall. We previously reported the first crystal structure of this domain and made a puzzling observation that all conserved residues that are thought to be essential for PG recognition are buried and inaccessible in the crystal structure. In this study, we tested a hypothesis that peptidoglycan binding is preceded by, or accompanied by, some structural reorganization that exposes the key conserved residues. METHODOLOGY/PRINCIPAL FINDINGS: We determined the structure of a new crystalline form (Form B) of Helicobacter pylori MotB-C. Comparisons with the existing Form A revealed conformational variations in the petal-like loops around the carbohydrate binding site near one end of the beta-sheet. These variations are thought to reflect natural flexibility at this site required for insertion into the peptidoglycan mesh. In order to understand the nature of this flexibility we have performed molecular dynamics simulations of the MotB-C dimer. The results are consistent with the crystallographic data and provide evidence that the three loops move in a concerted fashion, exposing conserved MotB residues that have previously been implicated in binding of the peptide moiety of peptidoglycan. CONCLUSION/SIGNIFICANCE: Our structural analysis provides a new insight into the mechanism by which MotB inserts into the peptidoglycan mesh, thus anchoring the power-generating complex to the cell wall.
Crystallographic and Molecular Dynamics Analysis of Loop Motions Unmasking the Peptidoglycan-Binding Site in Stator Protein MotB of Flagellar Motor.,Reboul CF, Andrews DA, Nahar MF, Buckle AM, Roujeinikova A PLoS One. 2011 Apr 20;6(4):e18981. PMID:21533052[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Reboul CF, Andrews DA, Nahar MF, Buckle AM, Roujeinikova A. Crystallographic and Molecular Dynamics Analysis of Loop Motions Unmasking the Peptidoglycan-Binding Site in Stator Protein MotB of Flagellar Motor. PLoS One. 2011 Apr 20;6(4):e18981. PMID:21533052 doi:10.1371/journal.pone.0018981
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