1zc4: Difference between revisions

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New page: left|200px<br /> <applet load="1zc4" size="450" color="white" frame="true" align="right" spinBox="true" caption="1zc4, resolution 2.50Å" /> '''Crystal structure o...
 
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[[Image:1zc4.gif|left|200px]]<br />
<applet load="1zc4" size="450" color="white" frame="true" align="right" spinBox="true"
caption="1zc4, resolution 2.50&Aring;" />
'''Crystal structure of the Ral-binding domain of Exo84 in complex with the active RalA'''<br />


==Overview==
==Crystal structure of the Ral-binding domain of Exo84 in complex with the active RalA==
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.
<StructureSection load='1zc4' size='340' side='right'caption='[[1zc4]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
 
== Structural highlights ==
==About this Structure==
<table><tr><td colspan='2'>[[1zc4]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZC4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZC4 FirstGlance]. <br>
1ZC4 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus] with MG and GNP as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1ZC4 OCA].  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5&#8491;</td></tr>
 
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GNP:PHOSPHOAMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
==Reference==
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1zc4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zc4 OCA], [https://pdbe.org/1zc4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zc4 RCSB], [https://www.ebi.ac.uk/pdbsum/1zc4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zc4 ProSAT]</span></td></tr>
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:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=15920473 15920473]
</table>
== Function ==
[https://www.uniprot.org/uniprot/RALA_HUMAN 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.<ref>PMID:18756269</ref> <ref>PMID:19306925</ref> <ref>PMID:20005108</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/zc/1zc4_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=1zc4 ConSurf].
<div style="clear:both"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Rattus norvegicus]]
[[Category: Brunger, A.T.]]
[[Category: Brunger AT]]
[[Category: Ervin, K.E.]]
[[Category: Ervin KE]]
[[Category: Jin, R.]]
[[Category: Jin R]]
[[Category: Junutula, J.R.]]
[[Category: Junutula JR]]
[[Category: Matern, H.T.]]
[[Category: Matern HT]]
[[Category: Scheller, R.H.]]
[[Category: Scheller RH]]
[[Category: GNP]]
[[Category: MG]]
[[Category: exocytosis]]
[[Category: gtp-binding protein]]
[[Category: small gtpase]]
 
''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 12 20:32:16 2007''

Latest revision as of 12:03, 14 February 2024

Crystal structure of the Ral-binding domain of Exo84 in complex with the active RalACrystal 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 Homo sapiens and Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.5Å
Ligands:,
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]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

References

  1. ↑ 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
  2. ↑ 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
  3. ↑ 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

1zc4, resolution 2.50Å

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