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Yorodumi- PDB-6icz: Cryo-EM structure of a human post-catalytic spliceosome (P comple... -
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Basic information
| Entry | Database: PDB / ID: 6icz | |||||||||
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| Title | Cryo-EM structure of a human post-catalytic spliceosome (P complex) at 3.0 angstrom | |||||||||
Components |
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Keywords | SPLICING / Human Post-catalytic Spliceosome | |||||||||
| Function / homology | Function and homology informationsecond spliceosomal transesterification activity / exon-exon junction subcomplex mago-y14 / negative regulation of selenocysteine incorporation / regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / cellular response to selenite ion / selenocysteine insertion sequence binding / exon-exon junction complex / pre-mRNA 3'-splice site binding / regulation of translation at postsynapse, modulating synaptic transmission / regulation of retinoic acid receptor signaling pathway ...second spliceosomal transesterification activity / exon-exon junction subcomplex mago-y14 / negative regulation of selenocysteine incorporation / regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / cellular response to selenite ion / selenocysteine insertion sequence binding / exon-exon junction complex / pre-mRNA 3'-splice site binding / regulation of translation at postsynapse, modulating synaptic transmission / regulation of retinoic acid receptor signaling pathway / post-mRNA release spliceosomal complex / intracellular mRNA localization / renal system process / 3'-5' RNA helicase activity / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / generation of catalytic spliceosome for first transesterification step / U7 snRNP / Z-decay: degradation of maternal mRNAs by zygotically expressed factors / cis assembly of pre-catalytic spliceosome / histone pre-mRNA 3'end processing complex / regulation of vitamin D receptor signaling pathway / regulation of mRNA processing / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / Deadenylation of mRNA / negative regulation of excitatory postsynaptic potential / nuclear retinoic acid receptor binding / embryonic brain development / oocyte development / embryonic cranial skeleton morphogenesis / protein methylation / alternative mRNA splicing, via spliceosome / U12-type spliceosomal complex / poly(A) binding / 7-methylguanosine cap hypermethylation / U1 snRNP binding / M-decay: degradation of maternal mRNAs by maternally stored factors / U2-type catalytic step 1 spliceosome / RNA splicing, via transesterification reactions / methylosome / pre-mRNA binding / C2H2 zinc finger domain binding / ATP-dependent activity, acting on RNA / pICln-Sm protein complex / positive regulation of mRNA splicing, via spliceosome / regulation of mRNA splicing, via spliceosome / snRNP binding / mRNA 3'-end processing / sno(s)RNA-containing ribonucleoprotein complex / small nuclear ribonucleoprotein complex / Notch binding / SMN-Sm protein complex / spliceosomal tri-snRNP complex / host-mediated activation of viral transcription / mRNA cis splicing, via spliceosome / U2-type precatalytic spliceosome / P granule / positive regulation of vitamin D receptor signaling pathway / commitment complex / telomerase holoenzyme complex / nuclear vitamin D receptor binding / U2-type prespliceosome assembly / U2-type spliceosomal complex / Transport of Mature mRNA derived from an Intron-Containing Transcript / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / telomerase RNA binding / RUNX3 regulates NOTCH signaling / U2-type catalytic step 2 spliceosome / NOTCH4 Intracellular Domain Regulates Transcription / U2 snRNP / U1 snRNP / RNA Polymerase II Transcription Termination / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / U4 snRNP / NOTCH3 Intracellular Domain Regulates Transcription / positive regulation of neurogenesis / U2-type prespliceosome / protein peptidyl-prolyl isomerization / inner cell mass cell proliferation / K63-linked polyubiquitin modification-dependent protein binding / ubiquitin-ubiquitin ligase activity / nuclear androgen receptor binding / cyclosporin A binding / precatalytic spliceosome / WD40-repeat domain binding / Notch-HLH transcription pathway / lipid biosynthetic process / Formation of paraxial mesoderm / regulation of alternative mRNA splicing, via spliceosome / SMAD binding / positive regulation of transforming growth factor beta receptor signaling pathway / mitotic G2 DNA damage checkpoint signaling / spliceosomal complex assembly / mRNA 3'-splice site recognition / mRNA Splicing - Minor Pathway / exploration behavior / protein kinase inhibitor activity Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3 Å | |||||||||
Authors | Zhang, X. / Zhan, X. / Yan, C. / Shi, Y. | |||||||||
| Funding support | China, 2items
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Citation | Journal: Cell Res / Year: 2019Title: Structures of the human spliceosomes before and after release of the ligated exon. Authors: Xiaofeng Zhang / Xiechao Zhan / Chuangye Yan / Wenyu Zhang / Dongliang Liu / Jianlin Lei / Yigong Shi / ![]() Abstract: Pre-mRNA splicing is executed by the spliceosome, which has eight major functional states each with distinct composition. Five of these eight human spliceosomal complexes, all preceding exon ...Pre-mRNA splicing is executed by the spliceosome, which has eight major functional states each with distinct composition. Five of these eight human spliceosomal complexes, all preceding exon ligation, have been structurally characterized. In this study, we report the cryo-electron microscopy structures of the human post-catalytic spliceosome (P complex) and intron lariat spliceosome (ILS) at average resolutions of 3.0 and 2.9 Å, respectively. In the P complex, the ligated exon remains anchored to loop I of U5 small nuclear RNA, and the 3'-splice site is recognized by the junction between the 5'-splice site and the branch point sequence. The ATPase/helicase Prp22, along with the ligated exon and eight other proteins, are dissociated in the P-to-ILS transition. Intriguingly, the ILS complex exists in two distinct conformations, one with the ATPase/helicase Prp43 and one without. Comparison of these three late-stage human spliceosomes reveals mechanistic insights into exon release and spliceosome disassembly. | |||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 6icz.cif.gz | 2.7 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb6icz.ent.gz | 1.9 MB | Display | PDB format |
| PDBx/mmJSON format | 6icz.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ic/6icz ftp://data.pdbj.org/pub/pdb/validation_reports/ic/6icz | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 9645MC ![]() 9646C ![]() 9647C ![]() 6id0C ![]() 6id1C M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Links
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Assembly
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Components
-Protein , 17 types, 18 molecules vwuxACJLNPRTUXQibY
| #1: Protein | Mass: 17301.799 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q96A72 | ||
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| #2: Protein | Mass: 19925.070 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9Y5S9 | ||
| #3: Protein | Mass: 46930.961 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P38919, RNA helicase | ||
| #4: Protein | Mass: 76381.992 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O15234 | ||
| #5: Protein | Mass: 273974.250 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q6P2Q9 | ||
| #7: Protein | Mass: 109560.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q15029 | ||
| #12: Protein | Mass: 100610.008 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9BZJ0 | ||
| #13: Protein | Mass: 92406.883 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q99459 | ||
| #15: Protein | Mass: 17032.850 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P41223 | ||
| #17: Protein | Mass: 26674.447 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9P013 | ||
| #18: Protein | Mass: 61770.648 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q13573 | ||
| #20: Protein | Mass: 57280.758 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O43660 | ||
| #21: Protein | Mass: 300255.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UQ35 | ||
| #24: Protein | Mass: 21040.176 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9H875 | ||
| #28: Protein | Mass: 171502.453 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O60306, RNA helicase | ||
| #30: Protein | Mass: 23686.004 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q66K91, UniProt: P14678*PLUS#38: Protein | | Mass: 139522.312 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q14562, RNA helicase |
-RNA chain , 4 types, 4 molecules BFGH
| #6: RNA chain | Mass: 37254.855 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 20330981 |
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| #9: RNA chain | Mass: 34404.438 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
| #10: RNA chain | Mass: 87382.422 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) |
| #11: RNA chain | Mass: 60186.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 340097 |
-U5 small nuclear ribonucleoprotein ... , 2 types, 2 molecules ED
| #8: Protein | Mass: 39359.492 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q96DI7 |
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| #41: Protein | Mass: 244823.422 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O75643, RNA helicase |
-Pre-mRNA-splicing factor ... , 6 types, 6 molecules MOVZIK
| #14: Protein | Mass: 28780.518 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O95926 |
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| #16: Protein | Mass: 46959.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9NW64 |
| #22: Protein | Mass: 105646.578 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9HCG8 |
| #25: Protein | Mass: 68510.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O95391 |
| #26: Protein | Mass: 100148.711 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9HCS7 |
| #39: Protein | Mass: 26163.420 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O75934 |
-Peptidyl-prolyl cis-trans ... , 2 types, 2 molecules Sy
| #19: Protein | Mass: 18257.805 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9Y3C6, peptidylprolyl isomerase |
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| #27: Protein | Mass: 33475.773 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: Q9UNP9, peptidylprolyl isomerase |
-Pre-mRNA-processing factor ... , 2 types, 5 molecules Wqrst
| #23: Protein | Mass: 65612.180 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: O60508 |
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| #40: Protein | Mass: 55245.547 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human)References: UniProt: Q9UMS4, RING-type E3 ubiquitin transferase |
-Small nuclear ribonucleoprotein ... , 6 types, 12 molecules hajckdmfleng
| #29: Protein | Mass: 13940.308 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62318#31: Protein | Mass: 13310.653 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62314#32: Protein | Mass: 13551.928 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62316#33: Protein | Mass: 9734.171 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62306#34: Protein | Mass: 10817.601 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62304#35: Protein | Mass: 8508.084 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62308 |
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-U2 small nuclear ribonucleoprotein ... , 2 types, 2 molecules op
| #36: Protein | Mass: 28456.584 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P09661 |
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| #37: Protein | Mass: 25524.367 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P08579 |
-Non-polymers , 5 types, 19 molecules 








| #42: Chemical | ChemComp-IHP / | ||||
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| #43: Chemical | ChemComp-GTP / | ||||
| #44: Chemical | ChemComp-MG / #45: Chemical | ChemComp-ZN / #46: Chemical | ChemComp-ATP / | |
-Details
| Has protein modification | Y |
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| Sequence details | The residue N (unknown nucleotide) between G-1 and G1 is added intentionally to fill in the ...The residue N (unknown nucleotide) between G-1 and G1 is added intentionally to fill in the cleavage by RNA splicing. |
-Experimental details
-Experiment
| Experiment | Method: ELECTRON MICROSCOPY |
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| EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
| Component | Name: Human Post_catalytic Spliceosome / Type: COMPLEX / Entity ID: #1-#41 / Source: NATURAL |
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| Source (natural) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.9 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Vitrification | Cryogen name: ETHANE |
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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 FIELD |
| Image recording | Electron dose: 45 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
| CTF correction | Type: NONE |
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| 3D reconstruction | Resolution: 3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 143320 / Symmetry type: POINT |
| Refinement | Highest resolution: 3 Å |
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About Yorodumi



Homo sapiens (human)
China, 2items
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