This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1d5w

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 00:53, 12 September 2015

PHOSPHORYLATED FIXJ RECEIVER DOMAIN

Structural highlights

1d5w is a 3 chain structure with sequence from Atcc 9930. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
NonStd Res:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[FIXJ_RHIME] FixJ, when activated by FixL, induces the expression of both nifA, required for activation of classical nif and fix genes, and fixK, required for FixN activation.

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

BACKGROUND: A variety of bacterial adaptative cellular responses to environmental stimuli are mediated by two-component signal transduction pathways. In these phosphorelay cascades, histidine kinases transphosphorylate a conserved aspartate in the receiver domain, a conserved module in the response regulator superfamily. The main effect of this phosphorylation is to alter the conformation of the response regulator in order to modulate its biological function. The response regulator FixJ displays a typical modular arrangement, with a phosphorylatable N-terminal receiver domain and a C-terminal DNA-binding domain. In the symbiotic bacterium Sinorhizobium meliloti, phosphorylation of this response regulator activates transcription of nitrogen-fixation genes. RESULTS: The crystal structures of the phosphorylated and of the unphosphorylated N-terminal receiver domain of FixJ (FixJN) were solved at 2.3 A and 2.4 A resolution, respectively. They reveal the environment of the phosphoaspartate in the active site and the specific conformational changes leading to activation of the response regulator. Phosphorylation of the conserved aspartate induces major structural changes in the beta 4-alpha 4 loop, and in the signaling surface alpha 4-beta 5 that mediates dimerization of the phosphorylated full-length response regulator. A site-directed mutant at this protein-protein interface decreases the affinity of the phosphorylated response regulator for the fixK promoter tenfold. CONCLUSIONS: The cascade of phosphorylation-induced conformational changes in FixJN illustrates the role of conserved residues in stabilizing the phosphoryl group in the active site, triggering the structural transition and achieving the post-phosphorylation signaling events. We propose that these phosphorylation-induced conformational changes underly the activation of response regulators in general.

Conformational changes induced by phosphorylation of the FixJ receiver domain.,Birck C, Mourey L, Gouet P, Fabry B, Schumacher J, Rousseau P, Kahn D, Samama JP Structure. 1999 Dec 15;7(12):1505-15. PMID:10647181^[1]

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

References

↑ Birck C, Mourey L, Gouet P, Fabry B, Schumacher J, Rousseau P, Kahn D, Samama JP. Conformational changes induced by phosphorylation of the FixJ receiver domain. Structure. 1999 Dec 15;7(12):1505-15. PMID:10647181

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/1d5w"

@@ Line 2: / Line 2: @@
 <StructureSection load='1d5w' size='340' side='right' caption='[[1d5w]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1d5w]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Sinorhizobium_meliloti Sinorhizobium meliloti]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D5W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1D5W FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1d5w]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_9930 Atcc 9930]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1D5W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1D5W 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='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=PHD:ASPARTYL+PHOSPHATE'>PHD</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=1d5w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d5w OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1d5w RCSB], [http://www.ebi.ac.uk/pdbsum/1d5w 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=1d5w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1d5w OCA], [http://pdbe.org/1d5w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1d5w RCSB], [http://www.ebi.ac.uk/pdbsum/1d5w PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1d5w" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Sinorhizobium meliloti]]
+[[Category: Atcc 9930]]
 [[Category: Birck, C]]
 [[Category: Fabry, B]]

1d5w

From Proteopedia

Revision as of 00:53, 12 September 2015

PHOSPHORYLATED FIXJ RECEIVER DOMAIN

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox