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==Crystal structure of Saccharomyces cerevisiae Gle1 CTD-Nup42 GBM complex== | ==Crystal structure of Saccharomyces cerevisiae Gle1 CTD-Nup42 GBM complex== | ||
<StructureSection load='6b4e' size='340' side='right' caption='[[6b4e]], [[Resolution|resolution]] 1.75Å' scene=''> | <StructureSection load='6b4e' size='340' side='right'caption='[[6b4e]], [[Resolution|resolution]] 1.75Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[6b4e]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6B4E OCA]. For a <b>guided tour on the structure components</b> use [ | <table><tr><td colspan='2'>[[6b4e]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae_S288C Saccharomyces cerevisiae S288C]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6B4E OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6B4E FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PRO:PROLINE'>PRO</scene></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.75Å</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PRO:PROLINE'>PRO</scene></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=6b4e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6b4e OCA], [https://pdbe.org/6b4e PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6b4e RCSB], [https://www.ebi.ac.uk/pdbsum/6b4e PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6b4e ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | == Function == | ||
[ | [https://www.uniprot.org/uniprot/GLE1_YEAST GLE1_YEAST] Functions as a component of the nuclear pore complex (NPC). NPC components, collectively referred to as nucleoporins (NUPs), can play the role of both NPC structural components and of docking or interaction partners for transiently associated nuclear transport factors. It is specifically involved in a terminal step of poly(A)+ mRNA transport through the NPC probably by binding the ATP-dependent RNA helicase DBP5 and GFD1 at the cytoplasmic side of the NPC. These interactions are thought to be important for the dissociation of transport proteins such as the heterogeneous nuclear ribonuleoprotein (hnRNP) NAB2 from exported mRNA.<ref>PMID:10523319</ref> <ref>PMID:10610322</ref> <ref>PMID:10684247</ref> <ref>PMID:11336711</ref> <ref>PMID:15208322</ref> | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The nuclear pore complex (NPC) controls the passage of macromolecules between the nucleus and cytoplasm, but how the NPC directly participates in macromolecular transport remains poorly understood. In the final step of mRNA export, the DEAD-box helicase DDX19 is activated by the nucleoporins Gle1, Nup214, and Nup42 to remove Nxf1*Nxt1 from mRNAs. Here, we report crystal structures of Gle1*Nup42 from three organisms that reveal an evolutionarily conserved binding mode. Biochemical reconstitution of the DDX19 ATPase cycle establishes that human DDX19 activation does not require IP6, unlike its fungal homologs, and that Gle1 stability affects DDX19 activation. Mutations linked to motor neuron diseases cause decreased Gle1 thermostability, implicating nucleoporin misfolding as a disease determinant. Crystal structures of human Gle1*Nup42*DDX19 reveal the structural rearrangements in DDX19 from an auto-inhibited to an RNA-binding competent state. Together, our results provide the foundation for further mechanistic analyses of mRNA export in humans. | |||
Structural and functional analysis of mRNA export regulation by the nuclear pore complex.,Lin DH, Correia AR, Cai SW, Huber FM, Jette CA, Hoelz A Nat Commun. 2018 Jun 13;9(1):2319. doi: 10.1038/s41467-018-04459-3. PMID:29899397<ref>PMID:29899397</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 6b4e" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Nucleoporin 3D structures|Nucleoporin 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Saccharomyces cerevisiae S288C]] | ||
[[Category: | [[Category: Cai SW]] | ||
[[Category: | [[Category: Correia AR]] | ||
[[Category: | [[Category: Hoelz A]] | ||
[[Category: | [[Category: Huber FM]] | ||
[[Category: | [[Category: Jette CA]] | ||
[[Category: | [[Category: Lin DH]] | ||
Latest revision as of 17:32, 4 October 2023
Crystal structure of Saccharomyces cerevisiae Gle1 CTD-Nup42 GBM complexCrystal structure of Saccharomyces cerevisiae Gle1 CTD-Nup42 GBM complex
Structural highlights
FunctionGLE1_YEAST Functions as a component of the nuclear pore complex (NPC). NPC components, collectively referred to as nucleoporins (NUPs), can play the role of both NPC structural components and of docking or interaction partners for transiently associated nuclear transport factors. It is specifically involved in a terminal step of poly(A)+ mRNA transport through the NPC probably by binding the ATP-dependent RNA helicase DBP5 and GFD1 at the cytoplasmic side of the NPC. These interactions are thought to be important for the dissociation of transport proteins such as the heterogeneous nuclear ribonuleoprotein (hnRNP) NAB2 from exported mRNA.[1] [2] [3] [4] [5] Publication Abstract from PubMedThe nuclear pore complex (NPC) controls the passage of macromolecules between the nucleus and cytoplasm, but how the NPC directly participates in macromolecular transport remains poorly understood. In the final step of mRNA export, the DEAD-box helicase DDX19 is activated by the nucleoporins Gle1, Nup214, and Nup42 to remove Nxf1*Nxt1 from mRNAs. Here, we report crystal structures of Gle1*Nup42 from three organisms that reveal an evolutionarily conserved binding mode. Biochemical reconstitution of the DDX19 ATPase cycle establishes that human DDX19 activation does not require IP6, unlike its fungal homologs, and that Gle1 stability affects DDX19 activation. Mutations linked to motor neuron diseases cause decreased Gle1 thermostability, implicating nucleoporin misfolding as a disease determinant. Crystal structures of human Gle1*Nup42*DDX19 reveal the structural rearrangements in DDX19 from an auto-inhibited to an RNA-binding competent state. Together, our results provide the foundation for further mechanistic analyses of mRNA export in humans. Structural and functional analysis of mRNA export regulation by the nuclear pore complex.,Lin DH, Correia AR, Cai SW, Huber FM, Jette CA, Hoelz A Nat Commun. 2018 Jun 13;9(1):2319. doi: 10.1038/s41467-018-04459-3. PMID:29899397[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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