View source for 2ntx


==Prone8==
<StructureSection load='2ntx' size='340' side='right'caption='[[2ntx]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2ntx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2NTX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2NTX FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ntx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ntx OCA], [https://pdbe.org/2ntx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ntx RCSB], [https://www.ebi.ac.uk/pdbsum/2ntx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ntx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ROGF8_ARATH ROGF8_ARATH] Guanine-nucleotide exchange factor (GEF) that acts as an activator of Rop (Rho of plants) GTPases by promoting the exchange of GDP for GTP. Active as homodimer.<ref>PMID:17218277</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/nt/2ntx_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <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/main_output.php?pdb_ID=2ntx ConSurf].
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== Publication Abstract from PubMed ==
Rho of plants (Rop) proteins belong to the superfamily of small GTP-binding (G) proteins and are vital regulators of signal transduction in plants. In order to become activated, Rop proteins need to exchange GDP for GTP, an intrinsically slow process catalyzed by guanine nucleotide exchange factors (GEFs). RopGEFs show no homology to animal RhoGEFs, and the catalytic mechanism remains elusive. GEF-catalysed nucleotide exchange proceeds via transient ternary and stable binary complexes. While a number of structural studies have analyzed binary nucleotide-free G protein-GEF complexes, very little is known about the ternary complexes. Here we report the X-ray structure of the catalytic PRONE domain of RopGEF8 from Arabidopsis thaliana, both alone and in a ternary complex with Rop4 and GDP. The features of the latter complex, a transient intermediate of the exchange reaction never directly observed before, suggest a common mechanism of catalyzed nucleotide exchange applicable to small G proteins in general.

Structural evidence for a common intermediate in small G protein-GEF reactions.,Thomas C, Fricke I, Scrima A, Berken A, Wittinghofer A Mol Cell. 2007 Jan 12;25(1):141-9. PMID:17218277<ref>PMID:17218277</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 2ntx" style="background-color:#fffaf0;"></div>

==See Also==
*[[Rho guanine nucleotide exchange factor 3D structures|Rho guanine nucleotide exchange factor 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arabidopsis thaliana]]
[[Category: Large Structures]]
[[Category: Berken A]]
[[Category: Fricke I]]
[[Category: Scrima A]]
[[Category: Thomas C]]
[[Category: Wittinghofer A]]