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2lp4

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Revision as of 17:45, 24 December 2014

Solution structure of P1-CheY/P2 complex in bacterial chemotaxis

Structural highlights

2lp4 is a 2 chain structure with sequence from Escherichia coli k-12. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1i5n, 1eay
Gene:	cheA, b1888, JW1877 (Escherichia coli K-12), cheY, b1882, JW1871 (Escherichia coli K-12)
Activity:	Histidine kinase, with EC number 2.7.13.3
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[CHEA_ECOLI] Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. CheA is autophosphorylated; it can transfer its phosphate group to either CheB or CheY. [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]

Publication Abstract from PubMed

In the bacterial chemotaxis two-component signaling system, the histidine-containing phosphotransfer domain (the "P1" domain) of CheA receives a phosphoryl group from the catalytic domain (P4) of CheA and transfers it to the cognate response regulator (RR) CheY, which is docked by the P2 domain of CheA. Phosphorylated CheY then diffuses into the cytoplasm and interacts with the FliM moiety of the flagellar motors, thereby modulating the direction of flagellar rotation. Structures of various histidine phosphotransfer domains (HPt) complexed with their cognate RR domains have been reported. Unlike the Escherichia coli chemotaxis system, however, these systems lack the additional domains dedicated to binding to the response regulators, and the interaction of an HPt domain with an RR domain in the presence of such a domain has not been examined on a structural basis. In this study, we used modern nuclear magnetic resonance techniques to construct a model for the interaction of the E. coli CheA P1 domain (HPt) and CheY (RR) in the presence of the CheY-binding domain, P2. Our results indicate that the presence of P2 may lead to a slightly different relative orientation of the HPt and RR domains versus those seen in such complex structures previously reported.

Solution structure of a complex of the histidine autokinase CheA with its substrate CheY.,Mo G, Zhou H, Kawamura T, Dahlquist FW Biochemistry. 2012 May 8;51(18):3786-98. Epub 2012 Apr 26. PMID:22494339^[2]

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

References

↑ 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
↑ Mo G, Zhou H, Kawamura T, Dahlquist FW. Solution structure of a complex of the histidine autokinase CheA with its substrate CheY. Biochemistry. 2012 May 8;51(18):3786-98. Epub 2012 Apr 26. PMID:22494339 doi:10.1021/bi300147m

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2lp4"

@@ Line 8: / Line 8: @@
 <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=2lp4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2lp4 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2lp4 RCSB], [http://www.ebi.ac.uk/pdbsum/2lp4 PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/CHEA_ECOLI CHEA_ECOLI]] Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. CheA is autophosphorylated; it can transfer its phosphate group to either CheB or CheY. [[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>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==

2lp4

From Proteopedia

Revision as of 17:45, 24 December 2014

Solution structure of P1-CheY/P2 complex in bacterial chemotaxis

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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