5lj5
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==Overall structure of the yeast spliceosome immediately after branching.== | |
| + | <SX load='5lj5' size='340' side='right' viewer='molstar' caption='[[5lj5]], [[Resolution|resolution]] 3.80Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[5lj5]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LJ5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5LJ5 FirstGlance]. <br> | ||
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.8Å</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>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=5lj5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5lj5 OCA], [https://pdbe.org/5lj5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5lj5 RCSB], [https://www.ebi.ac.uk/pdbsum/5lj5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5lj5 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/PRP8_YEAST PRP8_YEAST] Required for pre-spliceosome formation, which is the first step of pre-mRNA splicing. This protein is associated with snRNP U5. Has a role in branch site-3' splice site selection. Associates with the branch site-3' splice 3'-exon region. Also has a role in cell cycle.<ref>PMID:2835658</ref> <ref>PMID:9150140</ref> <ref>PMID:12773561</ref> <ref>PMID:18779563</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Pre-mRNA splicing proceeds by two consecutive trans-esterification reactions via a lariat-intron intermediate. We present the 3.8 A cryo-EM structure of the spliceosome immediately after lariat formation. The 5'-splice site is cleaved but remains close to the catalytic Mg2+ site in the U2/U6 snRNA triplex, and the 5'-phosphate of the intron nucleotide G(+1) is linked to the branch adenosine 2'OH. The 5'-exon is held between the Prp8 amino-terminal and Linker domains, and base-pairs with U5 snRNA loop 1. Non-Watson-Crick interactions between the branch helix and 5'-splice site dock the branch adenosine into the active site, while intron nucleotides +3 to +6 base-pair with the U6 snRNA ACAGAGA sequence. Isy1 and the step one factors Yju2 and Cwc25 stabilise docking of the branch helix. The intron downstream of the branch site emerges between the Prp8 reverse transcriptase (RT) and Linker domains and extends towards the Prp16 helicase, suggesting a plausible mechanism of remodelling before exon ligation. | ||
| - | + | Cryo-EM structure of the spliceosome immediately after branching.,Galej WP, Wilkinson ME, Fica SM, Oubridge C, Newman AJ, Nagai K Nature. 2016 Jul 26. doi: 10.1038/nature19316. PMID:27459055<ref>PMID:27459055</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 5lj5" style="background-color:#fffaf0;"></div> | ||
| + | |||
| + | ==See Also== | ||
| + | *[[Helicase 3D structures|Helicase 3D structures]] | ||
| + | *[[Pre-mRNA splicing factors 3D structures|Pre-mRNA splicing factors 3D structures]] | ||
| + | *[[Sm-like protein|Sm-like protein]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </SX> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Saccharomyces cerevisiae]] | ||
| + | [[Category: Fica SM]] | ||
| + | [[Category: Galej WP]] | ||
| + | [[Category: Nagai K]] | ||
| + | [[Category: Newman AJ]] | ||
| + | [[Category: Oubridge C]] | ||
| + | [[Category: Wilkinson MF]] | ||
Current revision
Overall structure of the yeast spliceosome immediately after branching.
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