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[[ | ==CRYSTAL STRUCTURE OF IMPORTIN 13 - UBC9 COMPLEX== | ||
<StructureSection load='2xwu' size='340' side='right' caption='[[2xwu]], [[Resolution|resolution]] 2.80Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2xwu]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2XWU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2XWU FirstGlance]. <br> | |||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2gro|2gro]], [[2grr|2grr]], [[1kps|1kps]], [[2grp|2grp]], [[1z5s|1z5s]], [[2x19|2x19]], [[2grq|2grq]], [[1a3s|1a3s]], [[2grn|2grn]]</td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ubiquitin--protein_ligase Ubiquitin--protein ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.19 6.3.2.19] </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=2xwu FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2xwu OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2xwu RCSB], [http://www.ebi.ac.uk/pdbsum/2xwu PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Importin13 (Imp13) is an unusual beta-karyopherin that is able to both import and export cargoes in and out of the nucleus. In the cytoplasm, Imp13 associates with different cargoes such as Mago-Y14 and Ubc9, and facilitates their import into the nucleus where RanGTP binding promotes the release of the cargo. In this study, we present the 2.8 A resolution crystal structure of Imp13 in complex with the SUMO E2-conjugating enzyme, Ubc9. The structure shows an uncommon mode of cargo-karyopherin recognition with Ubc9 binding at the N-terminal portion of Imp13, occupying the entire RanGTP-binding site. Comparison of the Imp13-Ubc9 complex with Imp13-Mago-Y14 shows the remarkable plasticity of Imp13, whose conformation changes from a closed ring to an open superhelix when bound to the two different cargoes. The structure also shows that the binding mode is compatible with the sumoylated states of Ubc9. Indeed, we find that Imp13 is able to bind sumoylated Ubc9 in vitro and suppresses autosumoylation activity in the complex. | |||
Structure of Importin13-Ubc9 complex: nuclear import and release of a key regulator of sumoylation.,Grunwald M, Bono F EMBO J. 2010 Dec 7. PMID:21139563<ref>PMID:21139563</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
==See Also== | ==See Also== | ||
*[[Importin|Importin]] | |||
*[[SUMO conjugating enzyme Ubc9|SUMO conjugating enzyme Ubc9]] | *[[SUMO conjugating enzyme Ubc9|SUMO conjugating enzyme Ubc9]] | ||
== References == | |||
== | <references/> | ||
< | __TOC__ | ||
</StructureSection> | |||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Ubiquitin--protein ligase]] | [[Category: Ubiquitin--protein ligase]] | ||
Revision as of 16:16, 22 October 2014
CRYSTAL STRUCTURE OF IMPORTIN 13 - UBC9 COMPLEXCRYSTAL STRUCTURE OF IMPORTIN 13 - UBC9 COMPLEX
Structural highlights
Publication Abstract from PubMedImportin13 (Imp13) is an unusual beta-karyopherin that is able to both import and export cargoes in and out of the nucleus. In the cytoplasm, Imp13 associates with different cargoes such as Mago-Y14 and Ubc9, and facilitates their import into the nucleus where RanGTP binding promotes the release of the cargo. In this study, we present the 2.8 A resolution crystal structure of Imp13 in complex with the SUMO E2-conjugating enzyme, Ubc9. The structure shows an uncommon mode of cargo-karyopherin recognition with Ubc9 binding at the N-terminal portion of Imp13, occupying the entire RanGTP-binding site. Comparison of the Imp13-Ubc9 complex with Imp13-Mago-Y14 shows the remarkable plasticity of Imp13, whose conformation changes from a closed ring to an open superhelix when bound to the two different cargoes. The structure also shows that the binding mode is compatible with the sumoylated states of Ubc9. Indeed, we find that Imp13 is able to bind sumoylated Ubc9 in vitro and suppresses autosumoylation activity in the complex. Structure of Importin13-Ubc9 complex: nuclear import and release of a key regulator of sumoylation.,Grunwald M, Bono F EMBO J. 2010 Dec 7. PMID:21139563[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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