2pmc

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(Difference between revisions)

Revision as of 09:28, 18 October 2017

Crystal Structure of CheY-Mg(2+) in Complex with CheZ(C15) Peptide solved from a P1 Crystal

Structural highlights

2pmc is a 6 chain structure with sequence from Salty. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2pl9
Gene:	cheY (SALTY)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CHEY_SALTY] 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. Shows autophosphatase activity which is enhanced by CheZ. [CHEZ_SALTY] Plays an important role in bacterial chemotaxis signal transduction pathway by accelerating the dephosphorylation of phosphorylated CheY (CheY-P). Acts on free CheY-P.^[1] ^[2] ^[3] ^[4] ^[5]

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

Chemotaxis, a means for motile bacteria to sense the environment and achieve directed swimming, is controlled by flagellar rotation. The primary output of the chemotaxis machinery is the phosphorylated form of the response regulator CheY (P-CheY). The steady-state level of P-CheY dictates the direction of rotation of the flagellar motor. The chemotaxis signal in the form of P-CheY is terminated by the phosphatase CheZ. Efficient dephosphorylation of CheY by CheZ requires two distinct protein-protein interfaces: one involving the strongly conserved C-terminal helix of CheZ (CheZ(C)) tethering the two proteins together and the other constituting an active site for catalytic dephosphorylation. In a previous work (J. Guhaniyogi, V. L. Robinson, and A. M. Stock, J. Mol. Biol. 359:624-645, 2006), we presented high-resolution crystal structures of CheY in complex with the CheZ(C) peptide that revealed alternate binding modes subject to the conformational state of CheY. In this study, we report biochemical and structural data that support the alternate-binding-mode hypothesis and identify key recognition elements in the CheY-CheZ(C) interaction. In addition, we present kinetic studies of the CheZ(C)-associated effect on CheY phosphorylation with its physiologically relevant phosphodonor, the histidine kinase CheA. Our results indicate mechanistic differences in phosphotransfer from the kinase CheA versus that from small-molecule phosphodonors, explaining a modest twofold increase of CheY phosphorylation with the former, observed in this study, relative to a 10-fold increase previously documented with the latter.

Interaction of CheY with the C-terminal peptide of CheZ.,Guhaniyogi J, Wu T, Patel SS, Stock AM J Bacteriol. 2008 Feb;190(4):1419-28. Epub 2007 Dec 14. PMID:18083806^[6]

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

References

↑ Lukat GS, Lee BH, Mottonen JM, Stock AM, Stock JB. Roles of the highly conserved aspartate and lysine residues in the response regulator of bacterial chemotaxis. J Biol Chem. 1991 May 5;266(13):8348-54. PMID:1902474
↑ Huang C, Stewart RC. CheZ mutants with enhanced ability to dephosphorylate CheY, the response regulator in bacterial chemotaxis. Biochim Biophys Acta. 1993 Oct 6;1202(2):297-304. PMID:8399392
↑ Bren A, Welch M, Blat Y, Eisenbach M. Signal termination in bacterial chemotaxis: CheZ mediates dephosphorylation of free rather than switch-bound CheY. Proc Natl Acad Sci U S A. 1996 Sep 17;93(19):10090-3. PMID:8816756
↑ Blat Y, Gillespie B, Bren A, Dahlquist FW, Eisenbach M. Regulation of phosphatase activity in bacterial chemotaxis. J Mol Biol. 1998 Dec 11;284(4):1191-9. PMID:9837737 doi:http://dx.doi.org/10.1006/jmbi.1998.2224
↑ Wolanin PM, Webre DJ, Stock JB. Mechanism of phosphatase activity in the chemotaxis response regulator CheY. Biochemistry. 2003 Dec 2;42(47):14075-82. PMID:14636076 doi:http://dx.doi.org/10.1021/bi034883t
↑ Guhaniyogi J, Wu T, Patel SS, Stock AM. Interaction of CheY with the C-terminal peptide of CheZ. J Bacteriol. 2008 Feb;190(4):1419-28. Epub 2007 Dec 14. PMID:18083806 doi:10.1128/JB.01414-07

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2pmc"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of CheY-Mg(2+) in Complex with CheZ(C15) Peptide solved from a P1 Crystal==
 <StructureSection load='2pmc' size='340' side='right' caption='[[2pmc]], [[Resolution|resolution]] 2.69&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2pl9|2pl9]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cheY ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=99287 SALTY])</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=2pmc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pmc OCA], [http://pdbe.org/2pmc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2pmc RCSB], [http://www.ebi.ac.uk/pdbsum/2pmc 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=2pmc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2pmc OCA], [http://pdbe.org/2pmc PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2pmc RCSB], [http://www.ebi.ac.uk/pdbsum/2pmc PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2pmc ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
-</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/chain_selection.php?pdb_ID=2ata ConSurf].
+</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=2pmc ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 29: / Line 30: @@
 </div>
 <div class="pdbe-citations 2pmc" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Chemotaxis protein|Chemotaxis protein]]
 == References ==
 <references/>

2pmc

From Proteopedia

Revision as of 09:28, 18 October 2017

Crystal Structure of CheY-Mg(2+) in Complex with CheZ(C15) Peptide solved from a P1 Crystal

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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