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Open data
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Basic information
Entry | Database: PDB / ID: 8i0s | ||||||
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Title | The cryo-EM structure of human Bact-II complex | ||||||
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![]() | SPLICING / spliceosome / Bact-II complex / RNA splicing / PRP2 / branching | ||||||
Function / homology | ![]() negative regulation of chemokine-mediated signaling pathway / snoRNA splicing / U11/U12 snRNP / post-mRNA release spliceosomal complex / regulation of retinoic acid receptor signaling pathway / 3'-5' RNA helicase activity / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / U7 snRNP ...negative regulation of chemokine-mediated signaling pathway / snoRNA splicing / U11/U12 snRNP / post-mRNA release spliceosomal complex / regulation of retinoic acid receptor signaling pathway / 3'-5' RNA helicase activity / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / U7 snRNP / generation of catalytic spliceosome for first transesterification step / B-WICH complex / regulation of vitamin D receptor signaling pathway / histone pre-mRNA 3'end processing complex / cis assembly of pre-catalytic spliceosome / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / embryonic brain development / splicing factor binding / spliceosome conformational change to release U4 (or U4atac) and U1 (or U11) / protein methylation / U12-type spliceosomal complex / methylosome / nuclear retinoic acid receptor binding / 7-methylguanosine cap hypermethylation / Prp19 complex / positive regulation of androgen receptor activity / poly(A) binding / snRNP binding / U1 snRNP binding / pICln-Sm protein complex / RNA splicing, via transesterification reactions / small nuclear ribonucleoprotein complex / pre-mRNA binding / U2-type catalytic step 1 spliceosome / sno(s)RNA-containing ribonucleoprotein complex / C2H2 zinc finger domain binding / regulation of mRNA splicing, via spliceosome / SMN-Sm protein complex / spliceosomal tri-snRNP complex / P granule / telomerase holoenzyme complex / mRNA cis splicing, via spliceosome / positive regulation by host of viral transcription / telomerase RNA binding / U2-type precatalytic spliceosome / U2-type spliceosomal complex / commitment complex / positive regulation of vitamin D receptor signaling pathway / nuclear vitamin D receptor binding / U2-type prespliceosome assembly / U2-type catalytic step 2 spliceosome / Notch binding / positive regulation of mRNA splicing, via spliceosome / Regulation of gene expression in late stage (branching morphogenesis) pancreatic bud precursor cells / U4 snRNP / RUNX3 regulates NOTCH signaling / U2 snRNP / Basigin interactions / RNA Polymerase II Transcription Termination / SAGA complex / NOTCH4 Intracellular Domain Regulates Transcription / positive regulation of transcription by RNA polymerase III / U1 snRNP / ubiquitin-ubiquitin ligase activity / NOTCH3 Intracellular Domain Regulates Transcription / pattern recognition receptor activity / WD40-repeat domain binding / Cajal body / positive regulation of neurogenesis / U2-type prespliceosome / cyclosporin A binding / nuclear androgen receptor binding / K63-linked polyubiquitin modification-dependent protein binding / positive regulation of G1/S transition of mitotic cell cycle / precatalytic spliceosome / retinoic acid receptor signaling pathway / positive regulation of transcription by RNA polymerase I / Notch-HLH transcription pathway / positive regulation of transforming growth factor beta receptor signaling pathway / Formation of paraxial mesoderm / spliceosomal complex assembly / mRNA Splicing - Minor Pathway / SMAD binding / regulation of RNA splicing / blastocyst development / mRNA 3'-splice site recognition / protein peptidyl-prolyl isomerization / protein localization to nucleus / spliceosomal tri-snRNP complex assembly / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / U5 snRNA binding / U5 snRNP / transcription-coupled nucleotide-excision repair / positive regulation of viral genome replication / U2 snRNA binding / RNA processing / U6 snRNA binding / spliceosomal snRNP assembly / regulation of DNA repair Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.2 Å | ||||||
![]() | Zhan, X. / Lu, Y. / Shi, Y. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Molecular basis for the activation of human spliceosome. Authors: Xiechao Zhan / Yichen Lu / Yigong Shi / ![]() Abstract: The spliceosome executes pre-mRNA splicing through four sequential stages: assembly, activation, catalysis, and disassembly. Activation of the spliceosome, namely remodeling of the pre-catalytic ...The spliceosome executes pre-mRNA splicing through four sequential stages: assembly, activation, catalysis, and disassembly. Activation of the spliceosome, namely remodeling of the pre-catalytic spliceosome (B complex) into the activated spliceosome (B complex) and the catalytically activated spliceosome (B complex), involves major flux of protein components and structural rearrangements. Relying on a splicing inhibitor, we have captured six intermediate states between the B and B complexes: pre-B, B-I, B-II, B-III, B-IV, and post-B. Their cryo-EM structures, together with an improved structure of the catalytic step I spliceosome (C complex), reveal how the catalytic center matures around the internal stem loop of U6 snRNA, how the branch site approaches 5'-splice site, how the RNA helicase PRP2 rearranges to bind pre-mRNA, and how U2 snRNP undergoes remarkable movement to facilitate activation. We identify a previously unrecognized key role of PRP2 in spliceosome activation. Our study recapitulates a molecular choreography of the human spliceosome during its catalytic activation. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 2.9 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 35108MC ![]() 8i0pC ![]() 8i0rC ![]() 8i0tC ![]() 8i0uC ![]() 8i0vC ![]() 8i0wC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
+Protein , 15 types, 16 molecules ACJKLNPQRTU7y9am
+RNA chain , 4 types, 4 molecules BFGH
+U5 small nuclear ribonucleoprotein ... , 2 types, 2 molecules DE
+Pre-mRNA-splicing factor ... , 4 types, 4 molecules IOVX
+Peptidyl-prolyl cis-trans isomerase-like ... , 2 types, 2 molecules SY
+Splicing factor 3B subunit ... , 5 types, 5 molecules 13245
+U2 small nuclear ribonucleoprotein ... , 2 types, 2 molecules po
+Splicing factor 3A subunit ... , 3 types, 3 molecules wvu
+Small nuclear ribonucleoprotein ... , 6 types, 12 molecules bnchdiejfkgl
+Non-polymers , 4 types, 16 molecules ![](data/chem/img/IHP.gif)
![](data/chem/img/GTP.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/ZN.gif)
![](data/chem/img/GTP.gif)
![](data/chem/img/MG.gif)
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+Details
-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: The human Bact-II complex / Type: COMPLEX Entity ID: #1-#3, #5, #21, #11, #6, #8, #24-#25, #10, #12, #15, #26-#27, #16, #9, #28-#31, #17, #19, #32-#33, #7, #14, #13, #20, #34, #4, #22-#23, #18, #35-#43 Source: NATURAL |
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Source (natural) | Organism: ![]() |
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: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1400 nm |
Image recording | Electron dose: 50 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.17.1_3660: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: NONE | ||||||||||||||||||||||||
3D reconstruction | Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 13372 / Symmetry type: POINT | ||||||||||||||||||||||||
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