1ymu: Difference between revisions

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[[Image:1ymu.jpg|left|200px]]


{{Structure
==SIGNAL TRANSDUCTION PROTEIN CHEY MUTANT WITH MET 17 REPLACED BY GLY (M17G)==
|PDB= 1ymu |SIZE=350|CAPTION= <scene name='initialview01'>1ymu</scene>, resolution 2.3&Aring;
<StructureSection load='1ymu' size='340' side='right'caption='[[1ymu]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
|SITE=
== Structural highlights ==
|LIGAND=
<table><tr><td colspan='2'>[[1ymu]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YMU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1YMU FirstGlance]. <br>
|ACTIVITY=
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3&#8491;</td></tr>
|GENE=
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ymu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ymu OCA], [https://pdbe.org/1ymu PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ymu RCSB], [https://www.ebi.ac.uk/pdbsum/1ymu PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ymu ProSAT]</span></td></tr>
}}
</table>
 
== Function ==
'''SIGNAL TRANSDUCTION PROTEIN CHEY MUTANT WITH MET 17 REPLACED BY GLY (M17G)'''
[https://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>
 
== Evolutionary Conservation ==
 
[[Image:Consurf_key_small.gif|200px|right]]
==Overview==
Check<jmol>
The three-dimensional crystal structures of the single mutant M17G and the triple mutant F14G-S15G-M17G of the response regulator protein CheY have been determined to 2.3 and 1.9 angstrom, respectively. Both mutants bind the essential Mg2+ cation as determined by the changes in stability, but binding does not cause the intrinsic fluorescence quenching of W58 observed in the wild-type protein. The loop beta4-alpha4 appears to be very flexible in both mutants and helix alpha4, which starts at N94 in the native Mg2+-CheY and at K91 in the native apo-CheY, starts in both mutants at residue K92. The side-chain of K109 appears to be more mobile because of the space freed by the M17G mutation. In the triple mutant the main chain of K109 and adjacent residues (loop beta5-alpha5) is displaced almost by 2 angstrom affecting the main chain at residues T87 to E89 (C terminus of beta4). The triple mutant structure has a Mg2+ bound at the active site, but although the Mg2+ coordination is similar to that of the native Mg2+-CheY, the structural consequences of the metal binding are quite different. It seems that the mutations have disrupted the mechanism of movement transmission observed in the native protein. We suggest that the side-chain of K109, packed between V86, A88 and M17 in the native protein, slides forwards and backwards upon activation and deactivation dragging the main chain at the loop beta5-alpha5 and triggering larger movements at the functional surface of the protein.
  <jmolCheckbox>
 
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ym/1ymu_consurf.spt"</scriptWhenChecked>
==About this Structure==
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
1YMU is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YMU OCA].  
    <text>to colour the structure by Evolutionary Conservation</text>
 
  </jmolCheckbox>
==Reference==
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1ymu ConSurf].
The three-dimensional structure of two mutants of the signal transduction protein CheY suggest its molecular activation mechanism., Bellsolell L, Cronet P, Majolero M, Serrano L, Coll M, J Mol Biol. 1996 Mar 22;257(1):116-28. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8632450 8632450]
<div style="clear:both"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Bellsolell, L.]]
[[Category: Bellsolell L]]
[[Category: Coll, M.]]
[[Category: Coll M]]
[[Category: chemotaxis]]
[[Category: phosphorylation]]
[[Category: sensory transduction]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:24:56 2008''

Latest revision as of 11:58, 14 February 2024

SIGNAL TRANSDUCTION PROTEIN CHEY MUTANT WITH MET 17 REPLACED BY GLY (M17G)SIGNAL TRANSDUCTION PROTEIN CHEY MUTANT WITH MET 17 REPLACED BY GLY (M17G)

Structural highlights

1ymu is a 2 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.3Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

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.[1]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

References

  1. ↑ Paul K, Nieto V, Carlquist WC, Blair DF, Harshey RM. The c-di-GMP binding protein YcgR controls flagellar motor direction and speed to affect chemotaxis by a "backstop brake" mechanism. Mol Cell. 2010 Apr 9;38(1):128-39. doi: 10.1016/j.molcel.2010.03.001. Epub 2010, Mar 25. PMID:20346719 doi:10.1016/j.molcel.2010.03.001

1ymu, resolution 2.30Å

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OCA
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