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| - | ==Crystal structure of the exportin Cse1p complexed with its cargo (Kap60p) and RanGTP== | + | ==Structure of the Cse1:Imp-alpha:RanGTP complex== |
| | <StructureSection load='1wa5' size='340' side='right'caption='[[1wa5]], [[Resolution|resolution]] 2.00Å' scene=''> | | <StructureSection load='1wa5' size='340' side='right'caption='[[1wa5]], [[Resolution|resolution]] 2.00Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1wa5]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824] and [http://en.wikipedia.org/wiki/Canlf Canlf]. The January 2007 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Importins'' by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2007_1 10.2210/rcsb_pdb/mom_2007_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WA5 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1WA5 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1wa5]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Canis_lupus_familiaris Canis lupus familiaris] and [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. The January 2007 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Importins'' by David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2007_1 10.2210/rcsb_pdb/mom_2007_1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WA5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1WA5 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><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></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]] 2Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1bk5|1bk5]], [[1bk6|1bk6]], [[1ee4|1ee4]], [[1ee5|1ee5]], [[1un0|1un0]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=1wa5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wa5 OCA], [http://pdbe.org/1wa5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1wa5 RCSB], [http://www.ebi.ac.uk/pdbsum/1wa5 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1wa5 ProSAT]</span></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=1wa5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wa5 OCA], [https://pdbe.org/1wa5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1wa5 RCSB], [https://www.ebi.ac.uk/pdbsum/1wa5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1wa5 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/CSE1_YEAST CSE1_YEAST]] Export receptor for importin alpha (SRP1). Mediates importin-alpha re-export from the nucleus to the cytoplasm after import substrates have been released into the nucleoplasm.<ref>PMID:9744791</ref> <ref>PMID:9857050</ref> <ref>PMID:9774694</ref> <ref>PMID:10394916</ref> [[http://www.uniprot.org/uniprot/IMA1_YEAST IMA1_YEAST]] Binds specifically and directly to substrates containing either a simple or bipartite NLS motif. Promotes docking of import substrates to the nuclear envelope. Seems to act as a cytosolic receptor for both simple and bipartite NLS motifs (By similarity).<ref>PMID:7565597</ref> <ref>PMID:10913188</ref> <ref>PMID:21075847</ref> | + | [https://www.uniprot.org/uniprot/CSE1_YEAST CSE1_YEAST] Export receptor for importin alpha (SRP1). Mediates importin-alpha re-export from the nucleus to the cytoplasm after import substrates have been released into the nucleoplasm.<ref>PMID:9744791</ref> <ref>PMID:9857050</ref> <ref>PMID:9774694</ref> <ref>PMID:10394916</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Atcc 18824]] | + | [[Category: Canis lupus familiaris]] |
| - | [[Category: Canlf]]
| + | |
| | [[Category: Importins]] | | [[Category: Importins]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| | [[Category: RCSB PDB Molecule of the Month]] | | [[Category: RCSB PDB Molecule of the Month]] |
| - | [[Category: Matsuura, Y]] | + | [[Category: Saccharomyces cerevisiae]] |
| - | [[Category: Stewart, M]] | + | [[Category: Stewart M]] |
| - | [[Category: Exportin]]
| + | |
| - | [[Category: Importin alpha]]
| + | |
| - | [[Category: Nuclear transport]]
| + | |
| - | [[Category: Nuclear transport-complex]]
| + | |
| - | [[Category: Protein transport]]
| + | |
| - | [[Category: Ran gtpase]]
| + | |
| Structural highlights
Function
CSE1_YEAST Export receptor for importin alpha (SRP1). Mediates importin-alpha re-export from the nucleus to the cytoplasm after import substrates have been released into the nucleoplasm.[1] [2] [3] [4]
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 nuclear import and export of macromolecular cargoes through nuclear pore complexes is mediated primarily by carriers such as importin-beta. Importins carry cargoes into the nucleus, whereas exportins carry cargoes to the cytoplasm. Transport is orchestrated by nuclear RanGTP, which dissociates cargoes from importins, but conversely is required for cargo binding to exportins. Here we present the 2.0 A crystal structure of the nuclear export complex formed by exportin Cse1p complexed with its cargo (Kap60p) and RanGTP, thereby providing a structural framework for understanding nuclear protein export and the different functions of RanGTP in export and import. In the complex, Cse1p coils around both RanGTP and Kap60p, stabilizing the RanGTP-state and clamping the Kap60p importin-beta-binding domain, ensuring that only cargo-free Kap60p is exported. Mutagenesis indicated that conformational changes in exportins couple cargo binding to high affinity for RanGTP, generating a spring-loaded molecule to facilitate disassembly of the export complex following GTP hydrolysis in the cytoplasm.
Structural basis for the assembly of a nuclear export complex.,Matsuura Y, Stewart M Nature. 2004 Dec 16;432(7019):872-7. PMID:15602554[5]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Kunzler M, Hurt EC. Cse1p functions as the nuclear export receptor for importin alpha in yeast. FEBS Lett. 1998 Aug 21;433(3):185-90. PMID:9744791
- ↑ Hood JK, Silver PA. Cse1p is required for export of Srp1p/importin-alpha from the nucleus in Saccharomyces cerevisiae. J Biol Chem. 1998 Dec 25;273(52):35142-6. PMID:9857050
- ↑ Solsbacher J, Maurer P, Bischoff FR, Schlenstedt G. Cse1p is involved in export of yeast importin alpha from the nucleus. Mol Cell Biol. 1998 Nov;18(11):6805-15. PMID:9774694
- ↑ Schroeder AJ, Chen XH, Xiao Z, Fitzgerald-Hayes M. Genetic evidence for interactions between yeast importin alpha (Srp1p) and its nuclear export receptor, Cse1p. Mol Gen Genet. 1999 Jun;261(4-5):788-95. PMID:10394916
- ↑ Matsuura Y, Stewart M. Structural basis for the assembly of a nuclear export complex. Nature. 2004 Dec 16;432(7019):872-7. PMID:15602554 doi:10.1038/nature03144
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