1d4z

<table><tr><td colspan='2'>[[1d4z]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D4Z OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1D4Z FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></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=1d4z FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d4z OCA], [http://pdbe.org/1d4z PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1d4z RCSB], [http://www.ebi.ac.uk/pdbsum/1d4z PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1d4z ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/CHEY_ECOLI CHEY_ECOLI]] Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. In its active (phosphorylated or acetylated) form, CheY exhibits enhanced binding to a switch component, FliM, at the flagellar motor which induces a change from counterclockwise to clockwise flagellar rotation. Overexpression of CheY in association with MotA and MotB improves motility of a ycgR disruption, suggesting there is an interaction (direct or indirect) between the c-di-GMP-binding flagellar brake protein and the flagellar stator.<ref>PMID:20346719</ref>

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== Publication Abstract from PubMed ==

In Escherichia coli, swimming behavior is mediated by the phosphorylation state of the response regulator CheY. In its active, phosphorylated form, CheY exhibits enhanced binding to a switch component, FliM, at the flagellar motor, which induces a change from counterclockwise to clockwise flagellar rotation. When Ile(95) of CheY is replaced by a valine, increased clockwise rotation correlates with enhanced binding to FliM. A possible explanation for the hyperactivity of this mutant is that residue 95 affects the conformation of nearby residues that potentially interact with FliM. In order to assess this possibility directly, the crystal structure of CheY95IV was determined. We found that CheY95IV is structurally almost indistinguishable from wild-type CheY. Several other mutants with substitutions at position 95 were characterized to establish the structural requirements for switch binding and clockwise signaling at this position and to investigate a general relationship between the two properties. The various rotational phenotypes of these mutants can be explained solely by the amount of phosphorylated CheY bound to the switch, which was inferred from the phosphorylation properties of the mutant CheY proteins and their binding affinities to FliM. Combined genetic, biochemical, and crystallographic results suggest that residue 95 itself is critical in mediating the surface complementarity between CheY and FliM.

Correlated switch binding and signaling in bacterial chemotaxis.,Schuster M, Zhao R, Bourret RB, Collins EJ J Biol Chem. 2000 Jun 30;275(26):19752-8. PMID:10748173<ref>PMID:10748173</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 1d4z" style="background-color:#fffaf0;"></div>

[[Category: Bacillus coli migula 1895]]

[[Category: Bourret, R B]]

[[Category: Collins, E J]]

[[Category: Schuster, M]]

[[Category: Zhao, R]]

[[Category: Signaling protein]]