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==The crystal structure of an activated Thermotoga maritima CheY with N-terminal region of FliM==
<StructureSection load='4iga' size='340' side='right'caption='[[4iga]], [[Resolution|resolution]] 1.73&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4iga]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermotoga_maritima_MSB8 Thermotoga maritima MSB8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4IGA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4IGA 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]] 1.73&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BEF:BERYLLIUM+TRIFLUORIDE+ION'>BEF</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=4iga FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4iga OCA], [https://pdbe.org/4iga PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4iga RCSB], [https://www.ebi.ac.uk/pdbsum/4iga PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4iga ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/FLIM_THEMA FLIM_THEMA] FliM is one of three proteins (FliG, FliN, FliM) that forms the rotor-mounted switch complex (C ring), located at the base of the basal body. This complex interacts with the CheY and CheX chemotaxis proteins, in addition to contacting components of the motor that determine the direction of flagellar rotation (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
In bacterial chemotaxis, the levels of phosphorylated CheY in association with FliM determine the sense of the flagella rotation, which in turn controls the bacterial swimming behavior. We report the 1.7A resolution crystallographic structure of the Thermotoga maritima BeF(3)(-)-activated CheY in complex with the CheY-binding N-terminal region of FliM. Analysis of the structure in comparison to the previously reported Escherichia coli counterpart reveals that similar regions of H4-beta5-H5 in CheY and the helix in FliM are used for the complex interfaces. Our structure also indicates that the correlated movement of Phe101 and Ser82 (F-S coupling) in T. maritima CheY upon phosphorylation and FliM binding, parallels that of Tyr106 and Thr87 (Y-T coupling) demonstrated in E. coli CheY. Furthermore, significant displacements of the beta4-H4 loop in both CheYs impose a crucial role of this loop, which can be related to flagellar switch component binding or to propagating changes that is necessary during the CheY-mediated reversal of the motor.

The crystal structure of an activated Thermotoga maritima CheY with N-terminal region of FliM.,Ahn DR, Song H, Kim J, Lee S, Park S Int J Biol Macromol. 2013 Mar;54:76-83. doi: 10.1016/j.ijbiomac.2012.12.003. Epub, 2012 Dec 10. PMID:23237794<ref>PMID:23237794</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 4iga" style="background-color:#fffaf0;"></div>

==See Also==
*[[Chemotaxis protein 3D structures|Chemotaxis protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermotoga maritima MSB8]]
[[Category: Ahn DR]]
[[Category: Park SY]]