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| | ==Rop4-GDP-PRONE8== | | ==Rop4-GDP-PRONE8== |
| - | <StructureSection load='2nty' size='340' side='right' caption='[[2nty]], [[Resolution|resolution]] 3.10Å' scene=''> | + | <StructureSection load='2nty' size='340' side='right'caption='[[2nty]], [[Resolution|resolution]] 3.10Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2nty]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Arath Arath]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2NTY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2NTY FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2nty]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Arath Arath]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2NTY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2NTY FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ntx|2ntx]]</td></tr> | + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2ntx|2ntx]]</div></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">At3g24620 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH]), ATU52350 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">At3g24620 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH]), ATU52350 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH])</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=2nty FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nty OCA], [http://pdbe.org/2nty PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2nty RCSB], [http://www.ebi.ac.uk/pdbsum/2nty PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2nty ProSAT]</span></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=2nty FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2nty OCA], [https://pdbe.org/2nty PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2nty RCSB], [https://www.ebi.ac.uk/pdbsum/2nty PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2nty ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://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> [[http://www.uniprot.org/uniprot/RAC5_ARATH RAC5_ARATH]] May be involved in cell polarity control during the actin-dependent tip growth of root hairs.<ref>PMID:11387211</ref> Inactive GDP-bound Rho GTPases reside in the cytosol, are found in a complex with Rho GDP-dissociation inhibitors (Rho GDIs), and are released from the GDI protein in order to translocate to membranes upon activation.<ref>PMID:11387211</ref> | + | [[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> [[https://www.uniprot.org/uniprot/RAC5_ARATH RAC5_ARATH]] May be involved in cell polarity control during the actin-dependent tip growth of root hairs.<ref>PMID:11387211</ref> Inactive GDP-bound Rho GTPases reside in the cytosol, are found in a complex with Rho GDP-dissociation inhibitors (Rho GDIs), and are released from the GDI protein in order to translocate to membranes upon activation.<ref>PMID:11387211</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | ==See Also== | | ==See Also== |
| - | *[[GTP-binding protein|GTP-binding protein]] | + | *[[GTP-binding protein 3D structures|GTP-binding protein 3D structures]] |
| - | *[[Rho guanine nucleotide exchange factor|Rho guanine nucleotide exchange factor]] | + | *[[Rho guanine nucleotide exchange factor 3D structures|Rho guanine nucleotide exchange factor 3D structures]] |
| | == References == | | == References == |
| | <references/> | | <references/> |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Arath]] | | [[Category: Arath]] |
| | + | [[Category: Large Structures]] |
| | [[Category: Berken, A]] | | [[Category: Berken, A]] |
| | [[Category: Fricke, I]] | | [[Category: Fricke, I]] |
| Structural highlights
Function
[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.[1] [RAC5_ARATH] May be involved in cell polarity control during the actin-dependent tip growth of root hairs.[2] Inactive GDP-bound Rho GTPases reside in the cytosol, are found in a complex with Rho GDP-dissociation inhibitors (Rho GDIs), and are released from the GDI protein in order to translocate to membranes upon activation.[3]
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
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[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Thomas C, Fricke I, Scrima A, Berken A, Wittinghofer A. Structural evidence for a common intermediate in small G protein-GEF reactions. Mol Cell. 2007 Jan 12;25(1):141-9. PMID:17218277 doi:http://dx.doi.org/10.1016/j.molcel.2006.11.023
- ↑ Molendijk AJ, Bischoff F, Rajendrakumar CS, Friml J, Braun M, Gilroy S, Palme K. Arabidopsis thaliana Rop GTPases are localized to tips of root hairs and control polar growth. EMBO J. 2001 Jun 1;20(11):2779-88. PMID:11387211 doi:http://dx.doi.org/10.1093/emboj/20.11.2779
- ↑ Molendijk AJ, Bischoff F, Rajendrakumar CS, Friml J, Braun M, Gilroy S, Palme K. Arabidopsis thaliana Rop GTPases are localized to tips of root hairs and control polar growth. EMBO J. 2001 Jun 1;20(11):2779-88. PMID:11387211 doi:http://dx.doi.org/10.1093/emboj/20.11.2779
- ↑ Thomas C, Fricke I, Scrima A, Berken A, Wittinghofer A. Structural evidence for a common intermediate in small G protein-GEF reactions. Mol Cell. 2007 Jan 12;25(1):141-9. PMID:17218277 doi:http://dx.doi.org/10.1016/j.molcel.2006.11.023
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