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1zc4

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Revision as of 09:04, 2 May 2018

Crystal structure of the Ral-binding domain of Exo84 in complex with the active RalA

Structural highlights

1zc4 is a 4 chain structure with sequence from Buffalo rat and Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	1zc3
Gene:	RALA, RAL (HUMAN)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[RALA_HUMAN] Multifunctional GTPase involved in a variety of cellular processes including gene expression, cell migration, cell proliferation, oncogenic transformation and membrane trafficking. Accomplishes its multiple functions by interacting with distinct downstream effectors. Acts as a GTP sensor for GTP-dependent exocytosis of dense core vesicles. Plays a role in the early stages of cytokinesis and is required to tether the exocyst to the cytokinetic furrow. The RALA-exocyst complex regulates integrin-dependent membrane raft exocytosis and growth signaling. Key regulator of LPAR1 signaling and competes with ADRBK1 for binding to LPAR1 thus affecting the signaling properties of the receptor. Required for anchorage-independent proliferation of transformed cells.^[1] ^[2] ^[3] [EXOC8_RAT] Component of the exocyst complex involved in the docking of exocytic vesicles with fusion sites on the plasma membrane.

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

The Sec6/8 complex, also known as the exocyst complex, is an octameric protein complex that has been implicated in tethering of secretory vesicles to specific regions on the plasma membrane. Two subunits of the Sec6/8 complex, Exo84 and Sec5, have recently been shown to be effector targets for active Ral GTPases. However, the mechanism by which Ral proteins regulate the Sec6/8 activities remains unclear. Here, we present the crystal structure of the Ral-binding domain of Exo84 in complex with active RalA. The structure reveals that the Exo84 Ral-binding domain adopts a pleckstrin homology domain fold, and that RalA interacts with Exo84 via an extended interface that includes both switch regions. Key residues of Exo84 and RalA were found that determine the specificity of the complex interactions; these interactions were confirmed by mutagenesis binding studies. Structural and biochemical data show that Exo84 and Sec5 competitively bind to active RalA. Taken together, these results further strengthen the proposed role of RalA-regulated assembly of the Sec6/8 complex.

Exo84 and Sec5 are competitive regulatory Sec6/8 effectors to the RalA GTPase.,Jin R, Junutula JR, Matern HT, Ervin KE, Scheller RH, Brunger AT EMBO J. 2005 Jun 15;24(12):2064-74. Epub 2005 May 26. PMID:15920473^[4]

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

References

↑ Cascone I, Selimoglu R, Ozdemir C, Del Nery E, Yeaman C, White M, Camonis J. Distinct roles of RalA and RalB in the progression of cytokinesis are supported by distinct RalGEFs. EMBO J. 2008 Sep 17;27(18):2375-87. doi: 10.1038/emboj.2008.166. Epub 2008 Aug, 28. PMID:18756269 doi:http://dx.doi.org/10.1038/emboj.2008.166
↑ Aziziyeh AI, Li TT, Pape C, Pampillo M, Chidiac P, Possmayer F, Babwah AV, Bhattacharya M. Dual regulation of lysophosphatidic acid (LPA1) receptor signalling by Ral and GRK. Cell Signal. 2009 Jul;21(7):1207-17. doi: 10.1016/j.cellsig.2009.03.011. Epub, 2009 Mar 21. PMID:19306925 doi:10.1016/j.cellsig.2009.03.011
↑ Balasubramanian N, Meier JA, Scott DW, Norambuena A, White MA, Schwartz MA. RalA-exocyst complex regulates integrin-dependent membrane raft exocytosis and growth signaling. Curr Biol. 2010 Jan 12;20(1):75-9. doi: 10.1016/j.cub.2009.11.016. Epub 2009 Dec , 10. PMID:20005108 doi:http://dx.doi.org/10.1016/j.cub.2009.11.016
↑ Jin R, Junutula JR, Matern HT, Ervin KE, Scheller RH, Brunger AT. Exo84 and Sec5 are competitive regulatory Sec6/8 effectors to the RalA GTPase. EMBO J. 2005 Jun 15;24(12):2064-74. Epub 2005 May 26. PMID:15920473

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/1zc4"

@@ Line 1: / Line 1: @@
 ==Crystal structure of the Ral-binding domain of Exo84 in complex with the active RalA==
 <StructureSection load='1zc4' size='340' side='right' caption='[[1zc4]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1zc3|1zc3]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">RALA, RAL ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</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=1zc4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zc4 OCA], [http://pdbe.org/1zc4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zc4 RCSB], [http://www.ebi.ac.uk/pdbsum/1zc4 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=1zc4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zc4 OCA], [http://pdbe.org/1zc4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1zc4 RCSB], [http://www.ebi.ac.uk/pdbsum/1zc4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1zc4 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zc/1zc4_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/zc/1zc4_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1zc4

From Proteopedia

Revision as of 09:04, 2 May 2018

Crystal structure of the Ral-binding domain of Exo84 in complex with the active RalA

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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