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{{STRUCTURE_3m1i|  PDB=3m1i  |  SCENE=  }}
==Crystal structure of yeast CRM1 (Xpo1p) in complex with yeast RanBP1 (Yrb1p) and yeast RanGTP (Gsp1pGTP)==
===Crystal structure of yeast CRM1 (Xpo1p) in complex with yeast RanBP1 (Yrb1p) and yeast RanGTP (Gsp1pGTP)===
<StructureSection load='3m1i' size='340' side='right' caption='[[3m1i]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
{{ABSTRACT_PUBMED_20485264}}
== Structural highlights ==
<table><tr><td colspan='2'>[[3m1i]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3M1I OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3M1I FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene><br>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GSP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), YRB1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824]), XPO1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</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=3m1i FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3m1i OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3m1i RCSB], [http://www.ebi.ac.uk/pdbsum/3m1i 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/m1/3m1i_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 ==
The karyopherin CRM1 mediates nuclear export of proteins and ribonucleoproteins bearing a leucine-rich nuclear export signal (NES). To elucidate the precise mechanism by which NES-cargos are dissociated from CRM1 in the cytoplasm, which is important for transport directionality, we determined a 2.0-A resolution crystal structure of yeast CRM1:RanBP1:RanGTP complex, an intermediate in the disassembly of the CRM1 nuclear export complex. The structure shows that on association of Ran-binding domain (RanBD) of RanBP1 with CRM1:NES-cargo:RanGTP complex, RanBD and the C-terminal acidic tail of Ran induce a large movement of the intra-HEAT9 loop of CRM1. The loop moves to the CRM1 inner surface immediately behind the NES-binding site and causes conformational rearrangements in HEAT repeats 11 and 12 so that the hydrophobic NES-binding cleft on the CRM1 outer surface closes, squeezing out the NES-cargo. This allosteric mechanism accelerates dissociation of NES by over two orders of magnitude. Structure-based mutagenesis indicated that the HEAT9 loop also functions as an allosteric autoinhibitor to stabilize CRM1 in a conformation that is unable to bind NES-cargo in the absence of RanGTP.


==Function==
An allosteric mechanism to displace nuclear export cargo from CRM1 and RanGTP by RanBP1.,Koyama M, Matsuura Y EMBO J. 2010 Jun 16;29(12):2002-13. Epub 2010 May 18. PMID:20485264<ref>PMID:20485264</ref>
[[http://www.uniprot.org/uniprot/GSP1_YEAST GSP1_YEAST]] GTP-binding protein involved in nucleocytoplasmic transport. Required for the import of protein into the nucleus and also for RNA export. Essential for cell viability. By analogy with Ras, Ran may be activated when GTP is exchanged for bound GDP by RCC1 and inactivated when GTP is hydrolyzed by Ran upon activation by RanGAP1. [[http://www.uniprot.org/uniprot/XPO1_YEAST XPO1_YEAST]] Receptor for the leucine-rich nuclear export signal (NES). [[http://www.uniprot.org/uniprot/YRB1_YEAST YRB1_YEAST]] Important for the export of protein containing nuclear export signal (NES) out of the nucleus. Stimulates the GTPase activity of GSP1 and GSP2.


==About this Structure==
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
[[3m1i]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3M1I OCA].
</div>
 
== References ==
==Reference==
<references/>
<ref group="xtra">PMID:020485264</ref><references group="xtra"/><references/>
__TOC__
[[Category: Saccharomyces cerevisiae]]
</StructureSection>
[[Category: Atcc 18824]]
[[Category: Koyama, M.]]
[[Category: Koyama, M.]]
[[Category: Matsuura, Y.]]
[[Category: Matsuura, Y.]]
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