2wbl: Difference between revisions
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[[Image: | ==THREE-DIMENSIONAL STRUCTURE OF A BINARY ROP-PRONE COMPLEX== | ||
<StructureSection load='2wbl' size='340' side='right' caption='[[2wbl]], [[Resolution|resolution]] 2.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2wbl]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2WBL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2WBL FirstGlance]. <br> | |||
</td></tr><tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2wbl FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2wbl OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2wbl RCSB], [http://www.ebi.ac.uk/pdbsum/2wbl PDBsum]</span></td></tr> | |||
<table> | |||
== 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/wb/2wbl_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/chain_selection.php?pdb_ID=2ata ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Abstract Guanine nucleotide exchange factors (GEFs) catalyze the activation of GTP-binding proteins (G proteins) in a multi-step reaction comprising intermediary complexes with and without nucleotide. Rho proteins of plants (ROPs) are activated by novel RopGEFs with a catalytic PRONE domain. We have previously characterized structures of GDP-bound ROP and a ternary complex between PRONE and ROP including loosely bound GDP. Now, we complete the molecular snapshots of the RopGEF reaction with the nucleotide-free ROP-PRONE structure at 2.9 A. The binary complex surprisingly closely resembles the preceding ternary intermediate including an unusually intact P-loop in the G protein. A striking difference is the prominent contact of the invariant P-loop lysine to a conserved switch II glutamate in ROP, favoring a key role of this interaction in driving out the nucleotide. The nucleotide-free state is supported by additional interactions involving the essential WW-motif in PRONE. We propose that this GEF region stabilizes the intact P-loop conformation, which facilitates re-association with a new nucleotide and further promotes the overall exchange reaction. With our novel structure we provide further insights into the nucleotide exchange mechanism and present a first example of the complete GEF reaction at a molecular level. | |||
3D structure of a binary ROP-PRONE complex: the final intermediate for a complete set of molecular snapshots of the RopGEF reaction.,Thomas C, Fricke I, Weyand M, Berken A Biol Chem. 2009 Mar 31. PMID:19335195<ref>PMID:19335195</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[GTP-binding protein|GTP-binding protein]] | *[[GTP-binding protein|GTP-binding protein]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Arabidopsis thaliana]] | [[Category: Arabidopsis thaliana]] | ||
[[Category: Berken, A.]] | [[Category: Berken, A.]] | ||
