+Open data
-Basic information
Entry | Database: PDB / ID: 6bk8 | ||||||||||||
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Title | S. cerevisiae spliceosomal post-catalytic P complex | ||||||||||||
Components |
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Keywords | RNA BINDING PROTEIN / pre-mRNA splicing / spliceosome / post-catalytic / P complex | ||||||||||||
Function / homology | Function and homology information U2-type post-spliceosomal complex / U2-type post-mRNA release spliceosomal complex / spliceosomal complex disassembly / mRNA branch site recognition / cellular bud site selection / pre-mRNA 3'-splice site binding / post-mRNA release spliceosomal complex / cis assembly of pre-catalytic spliceosome / generation of catalytic spliceosome for first transesterification step / nuclear mRNA surveillance ...U2-type post-spliceosomal complex / U2-type post-mRNA release spliceosomal complex / spliceosomal complex disassembly / mRNA branch site recognition / cellular bud site selection / pre-mRNA 3'-splice site binding / post-mRNA release spliceosomal complex / cis assembly of pre-catalytic spliceosome / generation of catalytic spliceosome for first transesterification step / nuclear mRNA surveillance / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / splicing factor binding / U4/U6 snRNP / 7-methylguanosine cap hypermethylation / pre-mRNA binding / U2-type catalytic step 1 spliceosome / pICln-Sm protein complex / Prp19 complex / spliceosomal tri-snRNP complex / small nuclear ribonucleoprotein complex / SMN-Sm protein complex / mRNA cis splicing, via spliceosome / U2-type spliceosomal complex / U2-type prespliceosome assembly / commitment complex / U2-type catalytic step 2 spliceosome / U4 snRNP / U2 snRNP / poly(U) RNA binding / U1 snRNP / U2-type prespliceosome / precatalytic spliceosome / spliceosomal complex assembly / Dual incision in TC-NER / DNA replication origin binding / generation of catalytic spliceosome for second transesterification step / protein K63-linked ubiquitination / Gap-filling DNA repair synthesis and ligation in TC-NER / mRNA 3'-splice site recognition / mRNA 5'-splice site recognition / DNA replication initiation / spliceosomal tri-snRNP complex assembly / U5 snRNA binding / U5 snRNP / U2 snRNA binding / spliceosomal snRNP assembly / U6 snRNA binding / pre-mRNA intronic binding / positive regulation of cell cycle / U1 snRNA binding / U4/U6 x U5 tri-snRNP complex / catalytic step 2 spliceosome / nuclear periphery / positive regulation of RNA splicing / spliceosomal complex / RING-type E3 ubiquitin transferase / mRNA splicing, via spliceosome / ubiquitin-protein transferase activity / metallopeptidase activity / ubiquitin protein ligase activity / RNA helicase activity / RNA helicase / cell cycle / DNA repair / mRNA binding / GTPase activity / chromatin binding / chromatin / GTP binding / ATP hydrolysis activity / mitochondrion / DNA binding / RNA binding / zinc ion binding / ATP binding / identical protein binding / metal ion binding / nucleus / cytosol / cytoplasm Similarity search - Function | ||||||||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||||||||
Authors | Liu, S. / Li, X. / Zhou, Z.H. / Zhao, R. | ||||||||||||
Funding support | United States, 3items
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Citation | Journal: Science / Year: 2017 Title: Structure of the yeast spliceosomal postcatalytic P complex. Authors: Shiheng Liu / Xueni Li / Lingdi Zhang / Jiansen Jiang / Ryan C Hill / Yanxiang Cui / Kirk C Hansen / Z Hong Zhou / Rui Zhao / Abstract: The spliceosome undergoes dramatic changes in a splicing cycle. Structures of B, B, C, C*, and intron lariat spliceosome complexes revealed mechanisms of 5'-splice site (ss) recognition, branching, ...The spliceosome undergoes dramatic changes in a splicing cycle. Structures of B, B, C, C*, and intron lariat spliceosome complexes revealed mechanisms of 5'-splice site (ss) recognition, branching, and intron release, but lacked information on 3'-ss recognition, exon ligation, and exon release. Here we report a cryo-electron microscopy structure of the postcatalytic P complex at 3.3-angstrom resolution, revealing that the 3' ss is mainly recognized through non-Watson-Crick base pairing with the 5' ss and branch point. Furthermore, one or more unidentified proteins become stably associated with the P complex, securing the 3' exon and potentially regulating activity of the helicase Prp22. Prp22 binds nucleotides 15 to 21 in the 3' exon, enabling it to pull the intron-exon or ligated exons in a 3' to 5' direction to achieve 3'-ss proofreading or exon release, respectively. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 6bk8.cif.gz | 2 MB | Display | PDBx/mmCIF format |
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PDB format | pdb6bk8.ent.gz | 1.5 MB | Display | PDB format |
PDBx/mmJSON format | 6bk8.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/bk/6bk8 ftp://data.pdbj.org/pub/pdb/validation_reports/bk/6bk8 | HTTPS FTP |
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-Related structure data
Related structure data | 7109MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-RNA chain , 5 types, 5 molecules 256ei
#1: RNA chain | Mass: 376267.406 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: GenBank: 536627 |
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#2: RNA chain | Mass: 68643.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: GenBank: 1039024040 |
#3: RNA chain | Mass: 35883.176 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: GenBank: 1039023280 |
#4: RNA chain | Mass: 10680.198 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
#5: RNA chain | Mass: 18717.949 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
-Pre-mRNA-splicing factor ... , 17 types, 17 molecules ABDFGHIKLNOPRSTUy
#6: Protein | Mass: 279867.469 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P33334 |
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#7: Protein | Mass: 114174.008 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P36048 |
#8: Protein | Mass: 50771.289 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q12417 |
#10: Protein | Mass: 40988.590 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P38241 |
#11: Protein | Mass: 38486.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q12046 |
#12: Protein | Mass: 19975.195 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q03772 |
#13: Protein | Mass: 18484.502 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P25337 |
#14: Protein | Mass: 15793.596 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q03375 |
#15: Protein | Mass: 67386.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P53333 |
#17: Protein | Mass: 28414.391 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P33411 |
#18: Protein | Mass: 44722.875 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q02775 |
#19: Protein | Mass: 130187.359 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P24384, RNA helicase |
#20: Protein | Mass: 24850.719 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P53277 |
#21: Protein | Mass: 67837.773 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q03654 |
#22: Protein | Mass: 82555.859 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q12309 |
#23: Protein | Mass: 100344.016 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q04048 |
#36: Protein | Mass: 20741.455 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q06091 |
-Protein , 4 types, 5 molecules Efkrs
#9: Protein | Mass: 42548.727 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P28004 | ||||
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#30: Protein | Mass: 22426.990 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P40018 #33: Protein | | Mass: 12850.944 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P40567 #34: Protein | | Mass: 27232.252 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q08963 |
-Pre-mRNA-processing factor ... , 2 types, 5 molecules Muvwx
#16: Protein | Mass: 52128.762 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P40968 |
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#35: Protein | Mass: 56629.777 Da / Num. of mol.: 4 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c References: UniProt: P32523, RING-type E3 ubiquitin transferase |
-Unknown protein ... , 2 types, 2 molecules XY
#24: Protein | Mass: 18655.930 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
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#25: Protein/peptide | Mass: 1379.692 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) |
-Small nuclear ribonucleoprotein ... , 6 types, 12 molecules aqbmcldngohp
#26: Protein | Mass: 12876.066 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q06217 #27: Protein | Mass: 9669.945 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P54999 #28: Protein | Mass: 10385.098 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q12330 #29: Protein | Mass: 8490.809 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P40204 #31: Protein | Mass: 11240.139 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: P43321 #32: Protein | Mass: 16296.798 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / References: UniProt: Q02260 |
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-Non-polymers , 4 types, 14 molecules
#37: Chemical | ChemComp-MG / #38: Chemical | ChemComp-IHP / | #39: Chemical | ChemComp-GTP / | #40: Chemical | ChemComp-ZN / |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Spliceosomal P complex / Type: COMPLEX / Entity ID: #1-#36 / Source: NATURAL |
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Source (natural) | Organism: Saccharomyces cerevisiae (brewer's yeast) |
Buffer solution | pH: 7.9 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy |
Image recording | Electron dose: 2 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 212219 / Symmetry type: POINT | ||||||||||||||||||||||||||||
Atomic model building | Details: The author states the following for the pre-mRNA model building: For regions in the intron or exon where no clear sequence preferences were observed (Spingola et al., PMID 10024174), U, A, ...Details: The author states the following for the pre-mRNA model building: For regions in the intron or exon where no clear sequence preferences were observed (Spingola et al., PMID 10024174), U, A, U, and A-U are used to represent a generic nucleotide, purine, pyrimidine, and standard Watson-Crick basepair, respectively, based on the EM density. Nucleotides -7 to +7 in the exon are modeled mostly as the preferred nucleotides in each position (Spingola et al. PMID 10024174) unless the density suggests otherwise. Some nucleotides in the intron seem to form basepairs with defined U2 or U6 snRNA sequence based on EM densities, and are modeled as complementary nucleotides to the corresponding U2 or U6 sequence unless the density suggests otherwise. |