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| | ==Crystal Structure of the Splicing Factor Cwc2 from yeast== | | ==Crystal Structure of the Splicing Factor Cwc2 from yeast== |
| | <StructureSection load='3tp2' size='340' side='right' caption='[[3tp2]], [[Resolution|resolution]] 2.40Å' scene=''> | | <StructureSection load='3tp2' size='340' side='right' caption='[[3tp2]], [[Resolution|resolution]] 2.40Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3tp2]] is a 2 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=3TP2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3TP2 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3tp2]] is a 2 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=3TP2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3TP2 FirstGlance]. <br> |
| | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CWC2, NTC40, SLC3, YDL209C, D1041 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae])</td></tr> | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CWC2, NTC40, SLC3, YDL209C, D1041 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</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=3tp2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tp2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3tp2 RCSB], [http://www.ebi.ac.uk/pdbsum/3tp2 PDBsum]</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=3tp2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tp2 OCA], [http://pdbe.org/3tp2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3tp2 RCSB], [http://www.ebi.ac.uk/pdbsum/3tp2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3tp2 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
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| | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> |
| | </div> | | </div> |
| | + | <div class="pdbe-citations 3tp2" style="background-color:#fffaf0;"></div> |
| | | | |
| | ==See Also== | | ==See Also== |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Saccharomyces cerevisiae]] | + | [[Category: Atcc 18824]] |
| | [[Category: Schmitzova, J]] | | [[Category: Schmitzova, J]] |
| | [[Category: Ccch zinc finger]] | | [[Category: Ccch zinc finger]] |
| Structural highlights
3tp2 is a 2 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Ligands: | , |
| Gene: | CWC2, NTC40, SLC3, YDL209C, D1041 (ATCC 18824) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[CWC2_YEAST] Involved in the first step of pre-mRNA splicing. Required for cell growth and cell cycle control. Plays a role in the levels of the U1, U4, U5 and U6 snRNAs and the maintenance of the U4/U6 snRNA complex. May provide the link between the "nineteen complex" NTC spliceosome protein complex and the spliceosome through the U6 snRNA. Associates predominantly with U6 snRNAs in assembled active spliceosomes. Binds directly to the internal stem-loop (ISL) domain of the U6 snRNA and to the pre-mRNA intron near the 5' splice site during the activation and catalytic phases of the spliceosome cycle. Binds also to U1, U4, U5 and U6 snRNAs and to pre-mRNAs, in vitro. Is not required for the Prp2-mediated remodeling of the activated spliceosome.[1] [2]
Publication Abstract from PubMed
The yeast splicing factor Cwc2 contacts several catalytically important RNA elements in the active spliceosome, suggesting that Cwc2 is involved in determining their spatial arrangement at the spliceosome's catalytic centre. We have determined the crystal structure of the Cwc2 functional core, revealing how a previously uncharacterized Torus domain, an RNA recognition motif (RRM) and a zinc finger (ZnF) are tightly integrated in a compact folding unit. The ZnF plays a pivotal role in the architecture of the whole assembly. UV-induced crosslinking of Cwc2-U6 snRNA allowed the identification by mass spectrometry of six RNA-contacting sites: four in or close to the RRM domain, one in the ZnF and one on a protruding element connecting the Torus and RRM domains. The three distinct regions contacting RNA are connected by a contiguous and conserved positively charged surface, suggesting an expanded interface for RNA accommodation. Cwc2 mutations confirmed that the connector element plays a crucial role in splicing. We conclude that Cwc2 acts as a multipartite RNA-binding platform to bring RNA elements of the spliceosome's catalytic centre into an active conformation.
Crystal structure of Cwc2 reveals a novel architecture of a multipartite RNA-binding protein.,Schmitzova J, Rasche N, Dybkov O, Kramer K, Fabrizio P, Urlaub H, Luhrmann R, Pena V EMBO J. 2012 Mar 9. doi: 10.1038/emboj.2012.58. PMID:22407296[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ McGrail JC, Krause A, O'Keefe RT. The RNA binding protein Cwc2 interacts directly with the U6 snRNA to link the nineteen complex to the spliceosome during pre-mRNA splicing. Nucleic Acids Res. 2009 Jul;37(13):4205-17. Epub 2009 May 12. PMID:19435883 doi:http://dx.doi.org/gkp341
- ↑ Rasche N, Dybkov O, Schmitzova J, Akyildiz B, Fabrizio P, Luhrmann R. Cwc2 and its human homologue RBM22 promote an active conformation of the spliceosome catalytic centre. EMBO J. 2012 Mar 21;31(6):1591-604. doi: 10.1038/emboj.2011.502. Epub 2012 Jan, 13. PMID:22246180 doi:http://dx.doi.org/10.1038/emboj.2011.502
- ↑ Schmitzova J, Rasche N, Dybkov O, Kramer K, Fabrizio P, Urlaub H, Luhrmann R, Pena V. Crystal structure of Cwc2 reveals a novel architecture of a multipartite RNA-binding protein. EMBO J. 2012 Mar 9. doi: 10.1038/emboj.2012.58. PMID:22407296 doi:10.1038/emboj.2012.58
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