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| | <StructureSection load='5h2w' size='340' side='right'caption='[[5h2w]], [[Resolution|resolution]] 2.50Å' scene=''> | | <StructureSection load='5h2w' size='340' side='right'caption='[[5h2w]], [[Resolution|resolution]] 2.50Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[5h2w]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Baker's_yeast Baker's yeast]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5H2W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5H2W FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[5h2w]] 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=5H2W OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5H2W FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5h2x|5h2x]], [[5h2v|5h2v]]</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]] 2.5Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SRP1, KAP60, YNL189W, N1606 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast]), ULP1, YPL020C, LPB11C ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=559292 Baker's yeast])</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=5h2w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5h2w OCA], [https://pdbe.org/5h2w PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5h2w RCSB], [https://www.ebi.ac.uk/pdbsum/5h2w PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5h2w ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Ulp1_peptidase Ulp1 peptidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.22.68 3.4.22.68] </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=5h2w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5h2w OCA], [http://pdbe.org/5h2w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5h2w RCSB], [http://www.ebi.ac.uk/pdbsum/5h2w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5h2w ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[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> [[http://www.uniprot.org/uniprot/ULP1_YEAST ULP1_YEAST]] Protease that catalyzes two essential functions in the SUMO pathway: processing of full-length SMT3 to its mature form and deconjugation of SMT3 from targeted proteins. Has an essential role in the G2/M phase of the cell cycle.<ref>PMID:10094048</ref> | + | [https://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> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Baker's yeast]] | |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Ulp1 peptidase]] | + | [[Category: Saccharomyces cerevisiae S288C]] |
| - | [[Category: Hirano, H]] | + | [[Category: Hirano H]] |
| - | [[Category: Matsuura, Y]] | + | [[Category: Matsuura Y]] |
| - | [[Category: Nuclear import]]
| + | |
| - | [[Category: Protein transport-hydrolase complex]]
| + | |
| Structural highlights
Function
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).[1] [2] [3]
Publication Abstract from PubMed
The budding yeast small ubiquitin-like modifier (SUMO) protease Ulp1p catalyzes both the processing of newly synthesized SUMO to its mature form and the deconjugation of SUMO from target proteins, thereby regulating a wide range of cellular processes including cell division, DNA repair, DNA replication, transcription, and mRNA quality control. Ulp1p is localized primarily at the nuclear pore complex (NPC) through interactions involving the karyopherins Kap121p and Kap95p-Kap60p heterodimer and a subset of nuclear pore-associated proteins. The sequestration of Ulp1p at the nuclear periphery is crucial for the proper control of protein desumoylation. To gain insights into the role of the karyopherins in regulating the localization of Ulp1p, we have determined the crystal structures of Kap121p and Kap60p bound to the N-terminal non-catalytic domain of Ulp1p that is necessary and sufficient for NPC targeting. Contrary to a previous proposal that Ulp1p is tethered to the transport channel of the NPC through unconventional interactions with the karyopherins, our structures reveal that Ulp1p has canonical nuclear localization signals (NLSs): (1) an isoleucine-lysine-NLS (residues 51-55) that binds to the NLS-binding site of Kap121p, and (2) a classical bipartite NLS (residues 154-172) that binds to the major and minor NLS-binding sites of Kap60p. Ulp1p also binds Kap95p directly, and the Ulp1p-Kap95p binding is enhanced by the importin-beta-binding domain of Kap60p. GTP-bound Gsp1p (the yeast Ran ortholog) and the exportin Cse1p cooperate to release Ulp1p from the karyopherins, indicating that the stable sequestration of Ulp1p to the NPC would require a karyopherin-independent mechanism to anchor Ulp1p at the NPC.
Structures of the Karyopherins Kap121p and Kap60p Bound to the Nuclear Pore-Targeting Domain of the SUMO Protease Ulp1p.,Hirano H, Kobayashi J, Matsuura Y J Mol Biol. 2017 Jan 20;429(2):249-260. doi: 10.1016/j.jmb.2016.11.029. Epub 2016, Dec 6. PMID:27939291[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Kussel P, Frasch M. Yeast Srp1, a nuclear protein related to Drosophila and mouse pendulin, is required for normal migration, division, and integrity of nuclei during mitosis. Mol Gen Genet. 1995 Aug 21;248(3):351-63. PMID:7565597
- ↑ Tabb MM, Tongaonkar P, Vu L, Nomura M. Evidence for separable functions of Srp1p, the yeast homolog of importin alpha (Karyopherin alpha): role for Srp1p and Sts1p in protein degradation. Mol Cell Biol. 2000 Aug;20(16):6062-73. PMID:10913188
- ↑ Chen L, Romero L, Chuang SM, Tournier V, Joshi KK, Lee JA, Kovvali G, Madura K. Sts1 plays a key role in targeting proteasomes to the nucleus. J Biol Chem. 2011 Jan 28;286(4):3104-18. doi: 10.1074/jbc.M110.135863. Epub 2010 , Nov 12. PMID:21075847 doi:10.1074/jbc.M110.135863
- ↑ Hirano H, Kobayashi J, Matsuura Y. Structures of the Karyopherins Kap121p and Kap60p Bound to the Nuclear Pore-Targeting Domain of the SUMO Protease Ulp1p. J Mol Biol. 2017 Jan 20;429(2):249-260. doi: 10.1016/j.jmb.2016.11.029. Epub 2016, Dec 6. PMID:27939291 doi:http://dx.doi.org/10.1016/j.jmb.2016.11.029
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